summaryrefslogtreecommitdiff
path: root/Documentation/networking/arcnet-hardware.rst
blob: 9822157235823f9af38b843f2b74babc4e14bc61 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
.. SPDX-License-Identifier: GPL-2.0

===============
ARCnet Hardware
===============

.. note::

   1) This file is a supplement to arcnet.txt.  Please read that for general
      driver configuration help.
   2) This file is no longer Linux-specific.  It should probably be moved out
      of the kernel sources.  Ideas?

Because so many people (myself included) seem to have obtained ARCnet cards
without manuals, this file contains a quick introduction to ARCnet hardware,
some cabling tips, and a listing of all jumper settings I can find. Please
e-mail apenwarr@worldvisions.ca with any settings for your particular card,
or any other information you have!


Introduction to ARCnet
======================

ARCnet is a network type which works in a way similar to popular Ethernet
networks but which is also different in some very important ways.

First of all, you can get ARCnet cards in at least two speeds: 2.5 Mbps
(slower than Ethernet) and 100 Mbps (faster than normal Ethernet).  In fact,
there are others as well, but these are less common.  The different hardware
types, as far as I'm aware, are not compatible and so you cannot wire a
100 Mbps card to a 2.5 Mbps card, and so on.  From what I hear, my driver does
work with 100 Mbps cards, but I haven't been able to verify this myself,
since I only have the 2.5 Mbps variety.  It is probably not going to saturate
your 100 Mbps card.  Stop complaining. :)

You also cannot connect an ARCnet card to any kind of Ethernet card and
expect it to work.

There are two "types" of ARCnet - STAR topology and BUS topology.  This
refers to how the cards are meant to be wired together.  According to most
available documentation, you can only connect STAR cards to STAR cards and
BUS cards to BUS cards.  That makes sense, right?  Well, it's not quite
true; see below under "Cabling."

Once you get past these little stumbling blocks, ARCnet is actually quite a
well-designed standard.  It uses something called "modified token passing"
which makes it completely incompatible with so-called "Token Ring" cards,
but which makes transfers much more reliable than Ethernet does.  In fact,
ARCnet will guarantee that a packet arrives safely at the destination, and
even if it can't possibly be delivered properly (ie. because of a cable
break, or because the destination computer does not exist) it will at least
tell the sender about it.

Because of the carefully defined action of the "token", it will always make
a pass around the "ring" within a maximum length of time.  This makes it
useful for realtime networks.

In addition, all known ARCnet cards have an (almost) identical programming
interface.  This means that with one ARCnet driver you can support any
card, whereas with Ethernet each manufacturer uses what is sometimes a
completely different programming interface, leading to a lot of different,
sometimes very similar, Ethernet drivers.  Of course, always using the same
programming interface also means that when high-performance hardware
facilities like PCI bus mastering DMA appear, it's hard to take advantage of
them.  Let's not go into that.

One thing that makes ARCnet cards difficult to program for, however, is the
limit on their packet sizes; standard ARCnet can only send packets that are
up to 508 bytes in length.  This is smaller than the Internet "bare minimum"
of 576 bytes, let alone the Ethernet MTU of 1500.  To compensate, an extra
level of encapsulation is defined by RFC1201, which I call "packet
splitting," that allows "virtual packets" to grow as large as 64K each,
although they are generally kept down to the Ethernet-style 1500 bytes.

For more information on the advantages and disadvantages (mostly the
advantages) of ARCnet networks, you might try the "ARCnet Trade Association"
WWW page:

	http://www.arcnet.com


Cabling ARCnet Networks
=======================

This section was rewritten by

	Vojtech Pavlik     <vojtech@suse.cz>

using information from several people, including:

	- Avery Pennraun     <apenwarr@worldvisions.ca>
	- Stephen A. Wood    <saw@hallc1.cebaf.gov>
	- John Paul Morrison <jmorriso@bogomips.ee.ubc.ca>
	- Joachim Koenig     <jojo@repas.de>

and Avery touched it up a bit, at Vojtech's request.

ARCnet (the classic 2.5 Mbps version) can be connected by two different
types of cabling: coax and twisted pair.  The other ARCnet-type networks
(100 Mbps TCNS and 320 kbps - 32 Mbps ARCnet Plus) use different types of
cabling (Type1, Fiber, C1, C4, C5).

For a coax network, you "should" use 93 Ohm RG-62 cable.  But other cables
also work fine, because ARCnet is a very stable network. I personally use 75
Ohm TV antenna cable.

Cards for coax cabling are shipped in two different variants: for BUS and
STAR network topologies.  They are mostly the same.  The only difference
lies in the hybrid chip installed.  BUS cards use high impedance output,
while STAR use low impedance.  Low impedance card (STAR) is electrically
equal to a high impedance one with a terminator installed.

Usually, the ARCnet networks are built up from STAR cards and hubs.  There
are two types of hubs - active and passive.  Passive hubs are small boxes
with four BNC connectors containing four 47 Ohm resistors::

	   |         | wires
	   R         + junction
	-R-+-R-      R 47 Ohm resistors
	   R
	   |

The shielding is connected together.  Active hubs are much more complicated;
they are powered and contain electronics to amplify the signal and send it
to other segments of the net.  They usually have eight connectors.  Active
hubs come in two variants - dumb and smart.  The dumb variant just
amplifies, but the smart one decodes to digital and encodes back all packets
coming through.  This is much better if you have several hubs in the net,
since many dumb active hubs may worsen the signal quality.

And now to the cabling.  What you can connect together:

1. A card to a card.  This is the simplest way of creating a 2-computer
   network.

2. A card to a passive hub.  Remember that all unused connectors on the hub
   must be properly terminated with 93 Ohm (or something else if you don't
   have the right ones) terminators.

	(Avery's note: oops, I didn't know that.  Mine (TV cable) works
	anyway, though.)

3. A card to an active hub.  Here is no need to terminate the unused
   connectors except some kind of aesthetic feeling.  But, there may not be
   more than eleven active hubs between any two computers.  That of course
   doesn't limit the number of active hubs on the network.

4. An active hub to another.

5. An active hub to passive hub.

Remember that you cannot connect two passive hubs together.  The power loss
implied by such a connection is too high for the net to operate reliably.

An example of a typical ARCnet network::

	   R                     S - STAR type card
    S------H--------A-------S    R - Terminator
	   |        |            H - Hub
	   |        |            A - Active hub
	   |   S----H----S
	   S        |
		    |
		    S

The BUS topology is very similar to the one used by Ethernet.  The only
difference is in cable and terminators: they should be 93 Ohm.  Ethernet
uses 50 Ohm impedance. You use T connectors to put the computers on a single
line of cable, the bus. You have to put terminators at both ends of the
cable. A typical BUS ARCnet network looks like::

    RT----T------T------T------T------TR
     B    B      B      B      B      B

  B - BUS type card
  R - Terminator
  T - T connector

But that is not all! The two types can be connected together.  According to
the official documentation the only way of connecting them is using an active
hub::

	 A------T------T------TR
	 |      B      B      B
     S---H---S
	 |
	 S

The official docs also state that you can use STAR cards at the ends of
BUS network in place of a BUS card and a terminator::

     S------T------T------S
	    B      B

But, according to my own experiments, you can simply hang a BUS type card
anywhere in middle of a cable in a STAR topology network.  And more - you
can use the bus card in place of any star card if you use a terminator. Then
you can build very complicated networks fulfilling all your needs!  An
example::

				  S
				  |
	   RT------T-------T------H------S
	    B      B       B      |
				  |       R
    S------A------T-------T-------A-------H------TR
	   |      B       B       |       |      B
	   |   S                 BT       |
	   |   |                  |  S----A-----S
    S------H---A----S             |       |
	   |   |      S------T----H---S   |
	   S   S             B    R       S

A basically different cabling scheme is used with Twisted Pair cabling. Each
of the TP cards has two RJ (phone-cord style) connectors.  The cards are
then daisy-chained together using a cable connecting every two neighboring
cards.  The ends are terminated with RJ 93 Ohm terminators which plug into
the empty connectors of cards on the ends of the chain.  An example::

	  ___________   ___________
      _R_|_         _|_|_         _|_R_
     |     |       |     |       |     |
     |Card |       |Card |       |Card |
     |_____|       |_____|       |_____|


There are also hubs for the TP topology.  There is nothing difficult
involved in using them; you just connect a TP chain to a hub on any end or
even at both.  This way you can create almost any network configuration.
The maximum of 11 hubs between any two computers on the net applies here as
well.  An example::

    RP-------P--------P--------H-----P------P-----PR
			       |
      RP-----H--------P--------H-----P------PR
	     |                 |
	     PR                PR

    R - RJ Terminator
    P - TP Card
    H - TP Hub

Like any network, ARCnet has a limited cable length.  These are the maximum
cable lengths between two active ends (an active end being an active hub or
a STAR card).

		========== ======= ===========
		RG-62       93 Ohm up to 650 m
		RG-59/U     75 Ohm up to 457 m
		RG-11/U     75 Ohm up to 533 m
		IBM Type 1 150 Ohm up to 200 m
		IBM Type 3 100 Ohm up to 100 m
		========== ======= ===========

The maximum length of all cables connected to a passive hub is limited to 65
meters for RG-62 cabling; less for others.  You can see that using passive
hubs in a large network is a bad idea. The maximum length of a single "BUS
Trunk" is about 300 meters for RG-62. The maximum distance between the two
most distant points of the net is limited to 3000 meters. The maximum length
of a TP cable between two cards/hubs is 650 meters.


Setting the Jumpers
===================

All ARCnet cards should have a total of four or five different settings:

  - the I/O address:  this is the "port" your ARCnet card is on.  Probed
    values in the Linux ARCnet driver are only from 0x200 through 0x3F0. (If
    your card has additional ones, which is possible, please tell me.) This
    should not be the same as any other device on your system.  According to
    a doc I got from Novell, MS Windows prefers values of 0x300 or more,
    eating net connections on my system (at least) otherwise.  My guess is
    this may be because, if your card is at 0x2E0, probing for a serial port
    at 0x2E8 will reset the card and probably mess things up royally.

	- Avery's favourite: 0x300.

  - the IRQ: on  8-bit cards, it might be 2 (9), 3, 4, 5, or 7.
	     on 16-bit cards, it might be 2 (9), 3, 4, 5, 7, or 10-15.

    Make sure this is different from any other card on your system.  Note
    that IRQ2 is the same as IRQ9, as far as Linux is concerned.  You can
    "cat /proc/interrupts" for a somewhat complete list of which ones are in
    use at any given time.  Here is a list of common usages from Vojtech
    Pavlik <vojtech@suse.cz>:

	("Not on bus" means there is no way for a card to generate this
	interrupt)

	======   =========================================================
	IRQ  0   Timer 0 (Not on bus)
	IRQ  1   Keyboard (Not on bus)
	IRQ  2   IRQ Controller 2 (Not on bus, nor does interrupt the CPU)
	IRQ  3   COM2
	IRQ  4   COM1
	IRQ  5   FREE (LPT2 if you have it; sometimes COM3; maybe PLIP)
	IRQ  6   Floppy disk controller
	IRQ  7   FREE (LPT1 if you don't use the polling driver; PLIP)
	IRQ  8   Realtime Clock Interrupt (Not on bus)
	IRQ  9   FREE (VGA vertical sync interrupt if enabled)
	IRQ 10   FREE
	IRQ 11   FREE
	IRQ 12   FREE
	IRQ 13   Numeric Coprocessor (Not on bus)
	IRQ 14   Fixed Disk Controller
	IRQ 15   FREE (Fixed Disk Controller 2 if you have it)
	======   =========================================================


	.. note::

	   IRQ 9 is used on some video cards for the "vertical retrace"
	   interrupt.  This interrupt would have been handy for things like
	   video games, as it occurs exactly once per screen refresh, but
	   unfortunately IBM cancelled this feature starting with the original
	   VGA and thus many VGA/SVGA cards do not support it.  For this
	   reason, no modern software uses this interrupt and it can almost
	   always be safely disabled, if your video card supports it at all.

	If your card for some reason CANNOT disable this IRQ (usually there
	is a jumper), one solution would be to clip the printed circuit
	contact on the board: it's the fourth contact from the left on the
	back side.  I take no responsibility if you try this.

	- Avery's favourite: IRQ2 (actually IRQ9).  Watch that VGA, though.

  - the memory address:  Unlike most cards, ARCnets use "shared memory" for
    copying buffers around.  Make SURE it doesn't conflict with any other
    used memory in your system!

    ::

	A0000		- VGA graphics memory (ok if you don't have VGA)
	B0000		- Monochrome text mode
	C0000		\  One of these is your VGA BIOS - usually C0000.
	E0000		/
	F0000		- System BIOS

    Anything less than 0xA0000 is, well, a BAD idea since it isn't above
    640k.

	- Avery's favourite: 0xD0000

  - the station address:  Every ARCnet card has its own "unique" network
    address from 0 to 255.  Unlike Ethernet, you can set this address
    yourself with a jumper or switch (or on some cards, with special
    software).  Since it's only 8 bits, you can only have 254 ARCnet cards
    on a network.  DON'T use 0 or 255, since these are reserved (although
    neat stuff will probably happen if you DO use them).  By the way, if you
    haven't already guessed, don't set this the same as any other ARCnet on
    your network!

	- Avery's favourite:  3 and 4.  Not that it matters.

  - There may be ETS1 and ETS2 settings.  These may or may not make a
    difference on your card (many manuals call them "reserved"), but are
    used to change the delays used when powering up a computer on the
    network.  This is only necessary when wiring VERY long range ARCnet
    networks, on the order of 4km or so; in any case, the only real
    requirement here is that all cards on the network with ETS1 and ETS2
    jumpers have them in the same position.  Chris Hindy <chrish@io.org>
    sent in a chart with actual values for this:

	======= ======= =============== ====================
	ET1	ET2	Response Time	Reconfiguration Time
	======= ======= =============== ====================
	open	open	74.7us		840us
	open	closed	283.4us		1680us
	closed	open	561.8us		1680us
	closed	closed	1118.6us	1680us
	======= ======= =============== ====================

    Make sure you set ETS1 and ETS2 to the SAME VALUE for all cards on your
    network.

Also, on many cards (not mine, though) there are red and green LED's.
Vojtech Pavlik <vojtech@suse.cz> tells me this is what they mean:

	=============== =============== =====================================
	GREEN           RED             Status
	=============== =============== =====================================
	OFF             OFF             Power off
	OFF             Short flashes   Cabling problems (broken cable or not
					terminated)
	OFF (short)     ON              Card init
	ON              ON              Normal state - everything OK, nothing
					happens
	ON              Long flashes    Data transfer
	ON              OFF             Never happens (maybe when wrong ID)
	=============== =============== =====================================


The following is all the specific information people have sent me about
their own particular ARCnet cards.  It is officially a mess, and contains
huge amounts of duplicated information.  I have no time to fix it.  If you
want to, PLEASE DO!  Just send me a 'diff -u' of all your changes.

The model # is listed right above specifics for that card, so you should be
able to use your text viewer's "search" function to find the entry you want.
If you don't KNOW what kind of card you have, try looking through the
various diagrams to see if you can tell.

If your model isn't listed and/or has different settings, PLEASE PLEASE
tell me.  I had to figure mine out without the manual, and it WASN'T FUN!

Even if your ARCnet model isn't listed, but has the same jumpers as another
model that is, please e-mail me to say so.

Cards Listed in this file (in this order, mostly):

	=============== ======================= ====
	Manufacturer	Model #			Bits
	=============== ======================= ====
	SMC		PC100			8
	SMC		PC110			8
	SMC		PC120			8
	SMC		PC130			8
	SMC		PC270E			8
	SMC		PC500			16
	SMC		PC500Longboard		16
	SMC		PC550Longboard		16
	SMC		PC600			16
	SMC		PC710			8
	SMC?		LCS-8830(-T)		8/16
	Puredata	PDI507			8
	CNet Tech	CN120-Series		8
	CNet Tech	CN160-Series		16
	Lantech?	UM9065L chipset		8
	Acer		5210-003		8
	Datapoint?	LAN-ARC-8		8
	Topware		TA-ARC/10		8
	Thomas-Conrad	500-6242-0097 REV A	8
	Waterloo?	(C)1985 Waterloo Micro. 8
	No Name		--			8/16
	No Name		Taiwan R.O.C?		8
	No Name		Model 9058		8
	Tiara		Tiara Lancard?		8
	=============== ======================= ====


* SMC = Standard Microsystems Corp.
* CNet Tech = CNet Technology, Inc.

Unclassified Stuff
==================

  - Please send any other information you can find.

  - And some other stuff (more info is welcome!)::

     From: root@ultraworld.xs4all.nl (Timo Hilbrink)
     To: apenwarr@foxnet.net (Avery Pennarun)
     Date: Wed, 26 Oct 1994 02:10:32 +0000 (GMT)
     Reply-To: timoh@xs4all.nl

     [...parts deleted...]

     About the jumpers: On my PC130 there is one more jumper, located near the
     cable-connector and it's for changing to star or bus topology;
     closed: star - open: bus
     On the PC500 are some more jumper-pins, one block labeled with RX,PDN,TXI
     and another with ALE,LA17,LA18,LA19 these are undocumented..

     [...more parts deleted...]

     --- CUT ---

Standard Microsystems Corp (SMC)
================================

PC100, PC110, PC120, PC130 (8-bit cards) and PC500, PC600 (16-bit cards)
------------------------------------------------------------------------

  - mainly from Avery Pennarun <apenwarr@worldvisions.ca>.  Values depicted
    are from Avery's setup.
  - special thanks to Timo Hilbrink <timoh@xs4all.nl> for noting that PC120,
    130, 500, and 600 all have the same switches as Avery's PC100.
    PC500/600 have several extra, undocumented pins though. (?)
  - PC110 settings were verified by Stephen A. Wood <saw@cebaf.gov>
  - Also, the JP- and S-numbers probably don't match your card exactly.  Try
    to find jumpers/switches with the same number of settings - it's
    probably more reliable.

::

	     JP5		       [|]    :    :    :    :
	(IRQ Setting)		      IRQ2  IRQ3 IRQ4 IRQ5 IRQ7
			Put exactly one jumper on exactly one set of pins.


				  1  2   3  4  5  6   7  8  9 10
	     S1                /----------------------------------\
	(I/O and Memory        |  1  1 * 0  0  0  0 * 1  1  0  1  |
	 addresses)            \----------------------------------/
				  |--|   |--------|   |--------|
				  (a)       (b)           (m)

			WARNING.  It's very important when setting these which way
			you're holding the card, and which way you think is '1'!

			If you suspect that your settings are not being made
			correctly, try reversing the direction or inverting the
			switch positions.

			a: The first digit of the I/O address.
				Setting		Value
				-------		-----
				00		0
				01		1
				10		2
				11		3

			b: The second digit of the I/O address.
				Setting		Value
				-------		-----
				0000		0
				0001		1
				0010		2
				...		...
				1110		E
				1111		F

			The I/O address is in the form ab0.  For example, if
			a is 0x2 and b is 0xE, the address will be 0x2E0.

			DO NOT SET THIS LESS THAN 0x200!!!!!


			m: The first digit of the memory address.
				Setting		Value
				-------		-----
				0000		0
				0001		1
				0010		2
				...		...
				1110		E
				1111		F

			The memory address is in the form m0000.  For example, if
			m is D, the address will be 0xD0000.

			DO NOT SET THIS TO C0000, F0000, OR LESS THAN A0000!

				  1  2  3  4  5  6  7  8
	     S2                /--------------------------\
	(Station Address)      |  1  1  0  0  0  0  0  0  |
			       \--------------------------/

				Setting		Value
				-------		-----
				00000000	00
				10000000	01
				01000000	02
				...
				01111111	FE
				11111111	FF

			Note that this is binary with the digits reversed!

			DO NOT SET THIS TO 0 OR 255 (0xFF)!


PC130E/PC270E (8-bit cards)
---------------------------

  - from Juergen Seifert <seifert@htwm.de>

This description has been written by Juergen Seifert <seifert@htwm.de>
using information from the following Original SMC Manual

	     "Configuration Guide for ARCNET(R)-PC130E/PC270 Network
	     Controller Boards Pub. # 900.044A June, 1989"

ARCNET is a registered trademark of the Datapoint Corporation
SMC is a registered trademark of the Standard Microsystems Corporation

The PC130E is an enhanced version of the PC130 board, is equipped with a
standard BNC female connector for connection to RG-62/U coax cable.
Since this board is designed both for point-to-point connection in star
networks and for connection to bus networks, it is downwardly compatible
with all the other standard boards designed for coax networks (that is,
the PC120, PC110 and PC100 star topology boards and the PC220, PC210 and
PC200 bus topology boards).

The PC270E is an enhanced version of the PC260 board, is equipped with two
modular RJ11-type jacks for connection to twisted pair wiring.
It can be used in a star or a daisy-chained network.

::

	 8 7 6 5 4 3 2 1
    ________________________________________________________________
   |   |       S1        |                                          |
   |   |_________________|                                          |
   |    Offs|Base |I/O Addr                                         |
   |     RAM Addr |                                              ___|
   |         ___  ___                                       CR3 |___|
   |        |   \/   |                                      CR4 |___|
   |        |  PROM  |                                           ___|
   |        |        |                                        N |   | 8
   |        | SOCKET |                                        o |   | 7
   |        |________|                                        d |   | 6
   |                   ___________________                    e |   | 5
   |                  |                   |                   A | S | 4
   |       |oo| EXT2  |                   |                   d | 2 | 3
   |       |oo| EXT1  |       SMC         |                   d |   | 2
   |       |oo| ROM   |      90C63        |                   r |___| 1
   |       |oo| IRQ7  |                   |               |o|  _____|
   |       |oo| IRQ5  |                   |               |o| | J1  |
   |       |oo| IRQ4  |                   |              STAR |_____|
   |       |oo| IRQ3  |                   |                   | J2  |
   |       |oo| IRQ2  |___________________|                   |_____|
   |___                                               ______________|
       |                                             |
       |_____________________________________________|

Legend::

  SMC 90C63	ARCNET Controller / Transceiver /Logic
  S1	1-3:	I/O Base Address Select
	4-6:	Memory Base Address Select
	7-8:	RAM Offset Select
  S2	1-8:	Node ID Select
  EXT		Extended Timeout Select
  ROM		ROM Enable Select
  STAR		Selected - Star Topology	(PC130E only)
		Deselected - Bus Topology	(PC130E only)
  CR3/CR4	Diagnostic LEDs
  J1		BNC RG62/U Connector		(PC130E only)
  J1		6-position Telephone Jack	(PC270E only)
  J2		6-position Telephone Jack	(PC270E only)

Setting one of the switches to Off/Open means "1", On/Closed means "0".


Setting the Node ID
^^^^^^^^^^^^^^^^^^^

The eight switches in group S2 are used to set the node ID.
These switches work in a way similar to the PC100-series cards; see that
entry for more information.


Setting the I/O Base Address
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The first three switches in switch group S1 are used to select one
of eight possible I/O Base addresses using the following table::


   Switch | Hex I/O
   1 2 3  | Address
   -------|--------
   0 0 0  |  260
   0 0 1  |  290
   0 1 0  |  2E0  (Manufacturer's default)
   0 1 1  |  2F0
   1 0 0  |  300
   1 0 1  |  350
   1 1 0  |  380
   1 1 1  |  3E0


Setting the Base Memory (RAM) buffer Address
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The memory buffer requires 2K of a 16K block of RAM. The base of this
16K block can be located in any of eight positions.
Switches 4-6 of switch group S1 select the Base of the 16K block.
Within that 16K address space, the buffer may be assigned any one of four
positions, determined by the offset, switches 7 and 8 of group S1.

::

   Switch     | Hex RAM | Hex ROM
   4 5 6  7 8 | Address | Address *)
   -----------|---------|-----------
   0 0 0  0 0 |  C0000  |  C2000
   0 0 0  0 1 |  C0800  |  C2000
   0 0 0  1 0 |  C1000  |  C2000
   0 0 0  1 1 |  C1800  |  C2000
	      |         |
   0 0 1  0 0 |  C4000  |  C6000
   0 0 1  0 1 |  C4800  |  C6000
   0 0 1  1 0 |  C5000  |  C6000
   0 0 1  1 1 |  C5800  |  C6000
	      |         |
   0 1 0  0 0 |  CC000  |  CE000
   0 1 0  0 1 |  CC800  |  CE000
   0 1 0  1 0 |  CD000  |  CE000
   0 1 0  1 1 |  CD800  |  CE000
	      |         |
   0 1 1  0 0 |  D0000  |  D2000  (Manufacturer's default)
   0 1 1  0 1 |  D0800  |  D2000
   0 1 1  1 0 |  D1000  |  D2000
   0 1 1  1 1 |  D1800  |  D2000
	      |         |
   1 0 0  0 0 |  D4000  |  D6000
   1 0 0  0 1 |  D4800  |  D6000
   1 0 0  1 0 |  D5000  |  D6000
   1 0 0  1 1 |  D5800  |  D6000
	      |         |
   1 0 1  0 0 |  D8000  |  DA000
   1 0 1  0 1 |  D8800  |  DA000
   1 0 1  1 0 |  D9000  |  DA000
   1 0 1  1 1 |  D9800  |  DA000
	      |         |
   1 1 0  0 0 |  DC000  |  DE000
   1 1 0  0 1 |  DC800  |  DE000
   1 1 0  1 0 |  DD000  |  DE000
   1 1 0  1 1 |  DD800  |  DE000
	      |         |
   1 1 1  0 0 |  E0000  |  E2000
   1 1 1  0 1 |  E0800  |  E2000
   1 1 1  1 0 |  E1000  |  E2000
   1 1 1  1 1 |  E1800  |  E2000

  *) To enable the 8K Boot PROM install the jumper ROM.
     The default is jumper ROM not installed.


Setting the Timeouts and Interrupt
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The jumpers labeled EXT1 and EXT2 are used to determine the timeout
parameters. These two jumpers are normally left open.

To select a hardware interrupt level set one (only one!) of the jumpers
IRQ2, IRQ3, IRQ4, IRQ5, IRQ7. The Manufacturer's default is IRQ2.


Configuring the PC130E for Star or Bus Topology
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The single jumper labeled STAR is used to configure the PC130E board for
star or bus topology.
When the jumper is installed, the board may be used in a star network, when
it is removed, the board can be used in a bus topology.


Diagnostic LEDs
^^^^^^^^^^^^^^^

Two diagnostic LEDs are visible on the rear bracket of the board.
The green LED monitors the network activity: the red one shows the
board activity::

 Green  | Status               Red      | Status
 -------|-------------------   ---------|-------------------
  on    | normal activity      flash/on | data transfer
  blink | reconfiguration      off      | no data transfer;
  off   | defective board or            | incorrect memory or
	| node ID is zero               | I/O address


PC500/PC550 Longboard (16-bit cards)
------------------------------------

  - from Juergen Seifert <seifert@htwm.de>


  .. note::

      There is another Version of the PC500 called Short Version, which
      is different in hard- and software! The most important differences
      are:

      - The long board has no Shared memory.
      - On the long board the selection of the interrupt is done by binary
	coded switch, on the short board directly by jumper.

[Avery's note: pay special attention to that: the long board HAS NO SHARED
MEMORY.  This means the current Linux-ARCnet driver can't use these cards.
I have obtained a PC500Longboard and will be doing some experiments on it in
the future, but don't hold your breath.  Thanks again to Juergen Seifert for
his advice about this!]

This description has been written by Juergen Seifert <seifert@htwm.de>
using information from the following Original SMC Manual

	 "Configuration Guide for SMC ARCNET-PC500/PC550
	 Series Network Controller Boards Pub. # 900.033 Rev. A
	 November, 1989"

ARCNET is a registered trademark of the Datapoint Corporation
SMC is a registered trademark of the Standard Microsystems Corporation

The PC500 is equipped with a standard BNC female connector for connection
to RG-62/U coax cable.
The board is designed both for point-to-point connection in star networks
and for connection to bus networks.

The PC550 is equipped with two modular RJ11-type jacks for connection
to twisted pair wiring.
It can be used in a star or a daisy-chained (BUS) network.

::

       1
       0 9 8 7 6 5 4 3 2 1     6 5 4 3 2 1
    ____________________________________________________________________
   < |         SW1         | |     SW2     |                            |
   > |_____________________| |_____________|                            |
   <   IRQ    |I/O Addr                                                 |
   >                                                                 ___|
   <                                                            CR4 |___|
   >                                                            CR3 |___|
   <                                                                 ___|
   >                                                              N |   | 8
   <                                                              o |   | 7
   >                                                              d | S | 6
   <                                                              e | W | 5
   >                                                              A | 3 | 4
   <                                                              d |   | 3
   >                                                              d |   | 2
   <                                                              r |___| 1
   >                                                        |o|    _____|
   <                                                        |o|   | J1  |
   >  3 1                                                   JP6   |_____|
   < |o|o| JP2                                                    | J2  |
   > |o|o|                                                        |_____|
   <  4 2__                                               ______________|
   >    |  |                                             |
   <____|  |_____________________________________________|

Legend::

  SW1	1-6:	I/O Base Address Select
	7-10:	Interrupt Select
  SW2	1-6:	Reserved for Future Use
  SW3	1-8:	Node ID Select
  JP2	1-4:	Extended Timeout Select
  JP6		Selected - Star Topology	(PC500 only)
		Deselected - Bus Topology	(PC500 only)
  CR3	Green	Monitors Network Activity
  CR4	Red	Monitors Board Activity
  J1		BNC RG62/U Connector		(PC500 only)
  J1		6-position Telephone Jack	(PC550 only)
  J2		6-position Telephone Jack	(PC550 only)

Setting one of the switches to Off/Open means "1", On/Closed means "0".


Setting the Node ID
^^^^^^^^^^^^^^^^^^^

The eight switches in group SW3 are used to set the node ID. Each node
attached to the network must have an unique node ID which must be
different from 0.
Switch 1 serves as the least significant bit (LSB).

The node ID is the sum of the values of all switches set to "1"
These values are::

    Switch | Value
    -------|-------
      1    |   1
      2    |   2
      3    |   4
      4    |   8
      5    |  16
      6    |  32
      7    |  64
      8    | 128

Some Examples::

    Switch         | Hex     | Decimal
   8 7 6 5 4 3 2 1 | Node ID | Node ID
   ----------------|---------|---------
   0 0 0 0 0 0 0 0 |    not allowed
   0 0 0 0 0 0 0 1 |    1    |    1
   0 0 0 0 0 0 1 0 |    2    |    2
   0 0 0 0 0 0 1 1 |    3    |    3
       . . .       |         |
   0 1 0 1 0 1 0 1 |   55    |   85
       . . .       |         |
   1 0 1 0 1 0 1 0 |   AA    |  170
       . . .       |         |
   1 1 1 1 1 1 0 1 |   FD    |  253
   1 1 1 1 1 1 1 0 |   FE    |  254
   1 1 1 1 1 1 1 1 |   FF    |  255


Setting the I/O Base Address
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The first six switches in switch group SW1 are used to select one
of 32 possible I/O Base addresses using the following table::

   Switch       | Hex I/O
   6 5  4 3 2 1 | Address
   -------------|--------
   0 1  0 0 0 0 |  200
   0 1  0 0 0 1 |  210
   0 1  0 0 1 0 |  220
   0 1  0 0 1 1 |  230
   0 1  0 1 0 0 |  240
   0 1  0 1 0 1 |  250
   0 1  0 1 1 0 |  260
   0 1  0 1 1 1 |  270
   0 1  1 0 0 0 |  280
   0 1  1 0 0 1 |  290
   0 1  1 0 1 0 |  2A0
   0 1  1 0 1 1 |  2B0
   0 1  1 1 0 0 |  2C0
   0 1  1 1 0 1 |  2D0
   0 1  1 1 1 0 |  2E0 (Manufacturer's default)
   0 1  1 1 1 1 |  2F0
   1 1  0 0 0 0 |  300
   1 1  0 0 0 1 |  310
   1 1  0 0 1 0 |  320
   1 1  0 0 1 1 |  330
   1 1  0 1 0 0 |  340
   1 1  0 1 0 1 |  350
   1 1  0 1 1 0 |  360
   1 1  0 1 1 1 |  370
   1 1  1 0 0 0 |  380
   1 1  1 0 0 1 |  390
   1 1  1 0 1 0 |  3A0
   1 1  1 0 1 1 |  3B0
   1 1  1 1 0 0 |  3C0
   1 1  1 1 0 1 |  3D0
   1 1  1 1 1 0 |  3E0
   1 1  1 1 1 1 |  3F0


Setting the Interrupt
^^^^^^^^^^^^^^^^^^^^^

Switches seven through ten of switch group SW1 are used to select the
interrupt level. The interrupt level is binary coded, so selections
from 0 to 15 would be possible, but only the following eight values will
be supported: 3, 4, 5, 7, 9, 10, 11, 12.

::

   Switch   | IRQ
   10 9 8 7 |
   ---------|--------
    0 0 1 1 |  3
    0 1 0 0 |  4
    0 1 0 1 |  5
    0 1 1 1 |  7
    1 0 0 1 |  9 (=2) (default)
    1 0 1 0 | 10
    1 0 1 1 | 11
    1 1 0 0 | 12


Setting the Timeouts
^^^^^^^^^^^^^^^^^^^^

The two jumpers JP2 (1-4) are used to determine the timeout parameters.
These two jumpers are normally left open.
Refer to the COM9026 Data Sheet for alternate configurations.


Configuring the PC500 for Star or Bus Topology
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The single jumper labeled JP6 is used to configure the PC500 board for
star or bus topology.
When the jumper is installed, the board may be used in a star network, when
it is removed, the board can be used in a bus topology.


Diagnostic LEDs
^^^^^^^^^^^^^^^

Two diagnostic LEDs are visible on the rear bracket of the board.
The green LED monitors the network activity: the red one shows the
board activity::

 Green  | Status               Red      | Status
 -------|-------------------   ---------|-------------------
  on    | normal activity      flash/on | data transfer
  blink | reconfiguration      off      | no data transfer;
  off   | defective board or            | incorrect memory or
	| node ID is zero               | I/O address


PC710 (8-bit card)
------------------

  - from J.S. van Oosten <jvoosten@compiler.tdcnet.nl>

Note: this data is gathered by experimenting and looking at info of other
cards. However, I'm sure I got 99% of the settings right.

The SMC710 card resembles the PC270 card, but is much more basic (i.e. no
LEDs, RJ11 jacks, etc.) and 8 bit. Here's a little drawing::

    _______________________________________
   | +---------+  +---------+              |____
   | |   S2    |  |   S1    |              |
   | +---------+  +---------+              |
   |                                       |
   |  +===+    __                          |
   |  | R |   |  | X-tal                 ###___
   |  | O |   |__|                      ####__'|
   |  | M |    ||                        ###
   |  +===+                                |
   |                                       |
   |   .. JP1   +----------+               |
   |   ..       | big chip |               |
   |   ..       |  90C63   |               |
   |   ..       |          |               |
   |   ..       +----------+               |
    -------                     -----------
	   |||||||||||||||||||||

The row of jumpers at JP1 actually consists of 8 jumpers, (sometimes
labelled) the same as on the PC270, from top to bottom: EXT2, EXT1, ROM,
IRQ7, IRQ5, IRQ4, IRQ3, IRQ2 (gee, wonder what they would do? :-) )

S1 and S2 perform the same function as on the PC270, only their numbers
are swapped (S1 is the nodeaddress, S2 sets IO- and RAM-address).

I know it works when connected to a PC110 type ARCnet board.


*****************************************************************************

Possibly SMC
============

LCS-8830(-T) (8 and 16-bit cards)
---------------------------------

  - from Mathias Katzer <mkatzer@HRZ.Uni-Bielefeld.DE>
  - Marek Michalkiewicz <marekm@i17linuxb.ists.pwr.wroc.pl> says the
    LCS-8830 is slightly different from LCS-8830-T.  These are 8 bit, BUS
    only (the JP0 jumper is hardwired), and BNC only.

This is a LCS-8830-T made by SMC, I think ('SMC' only appears on one PLCC,
nowhere else, not even on the few Xeroxed sheets from the manual).

SMC ARCnet Board Type LCS-8830-T::

     ------------------------------------
    |                                    |
    |              JP3 88  8 JP2         |
    |       #####      | \               |
    |       #####    ET1 ET2          ###|
    |                              8  ###|
    |  U3   SW 1                  JP0 ###|  Phone Jacks
    |  --                             ###|
    | |  |                               |
    | |  |   SW2                         |
    | |  |                               |
    | |  |  #####                        |
    |  --   #####                       ####  BNC Connector
    |                                   ####
    |   888888 JP1                       |
    |   234567                           |
     --                           -------
       |||||||||||||||||||||||||||
	--------------------------


  SW1: DIP-Switches for Station Address
  SW2: DIP-Switches for Memory Base and I/O Base addresses

  JP0: If closed, internal termination on (default open)
  JP1: IRQ Jumpers
  JP2: Boot-ROM enabled if closed
  JP3: Jumpers for response timeout

  U3: Boot-ROM Socket


  ET1 ET2     Response Time     Idle Time    Reconfiguration Time

		 78                86               840
   X            285               316              1680
       X        563               624              1680
   X   X       1130              1237              1680

  (X means closed jumper)

  (DIP-Switch downwards means "0")

The station address is binary-coded with SW1.

The I/O base address is coded with DIP-Switches 6,7 and 8 of SW2:

========	========
Switches        Base
678             Address
========	========
000		260-26f
100		290-29f
010		2e0-2ef
110		2f0-2ff
001		300-30f
101		350-35f
011		380-38f
111 		3e0-3ef
========	========


DIP Switches 1-5 of SW2 encode the RAM and ROM Address Range:

========        ============= ================
Switches        RAM           ROM
12345           Address Range  Address Range
========        ============= ================
00000		C:0000-C:07ff	C:2000-C:3fff
10000		C:0800-C:0fff
01000		C:1000-C:17ff
11000		C:1800-C:1fff
00100		C:4000-C:47ff	C:6000-C:7fff
10100		C:4800-C:4fff
01100		C:5000-C:57ff
11100		C:5800-C:5fff
00010		C:C000-C:C7ff	C:E000-C:ffff
10010		C:C800-C:Cfff
01010		C:D000-C:D7ff
11010		C:D800-C:Dfff
00110		D:0000-D:07ff	D:2000-D:3fff
10110		D:0800-D:0fff
01110		D:1000-D:17ff
11110		D:1800-D:1fff
00001		D:4000-D:47ff	D:6000-D:7fff
10001		D:4800-D:4fff
01001		D:5000-D:57ff
11001		D:5800-D:5fff
00101		D:8000-D:87ff	D:A000-D:bfff
10101		D:8800-D:8fff
01101		D:9000-D:97ff
11101		D:9800-D:9fff
00011		D:C000-D:c7ff	D:E000-D:ffff
10011		D:C800-D:cfff
01011		D:D000-D:d7ff
11011		D:D800-D:dfff
00111		E:0000-E:07ff	E:2000-E:3fff
10111		E:0800-E:0fff
01111		E:1000-E:17ff
11111		E:1800-E:1fff
========        ============= ================


PureData Corp
=============

PDI507 (8-bit card)
--------------------

  - from Mark Rejhon <mdrejhon@magi.com> (slight modifications by Avery)
  - Avery's note: I think PDI508 cards (but definitely NOT PDI508Plus cards)
    are mostly the same as this.  PDI508Plus cards appear to be mainly
    software-configured.

Jumpers:

	There is a jumper array at the bottom of the card, near the edge
	connector.  This array is labelled J1.  They control the IRQs and
	something else.  Put only one jumper on the IRQ pins.

	ETS1, ETS2 are for timing on very long distance networks.  See the
	more general information near the top of this file.

	There is a J2 jumper on two pins.  A jumper should be put on them,
	since it was already there when I got the card.  I don't know what
	this jumper is for though.

	There is a two-jumper array for J3.  I don't know what it is for,
	but there were already two jumpers on it when I got the card.  It's
	a six pin grid in a two-by-three fashion.  The jumpers were
	configured as follows::

	   .-------.
	 o | o   o |
	   :-------:    ------> Accessible end of card with connectors
	 o | o   o |             in this direction ------->
	   `-------'

Carl de Billy <CARL@carainfo.com> explains J3 and J4:

   J3 Diagram::

	   .-------.
	 o | o   o |
	   :-------:    TWIST Technology
	 o | o   o |
	   `-------'
	   .-------.
	   | o   o | o
	   :-------:    COAX Technology
	   | o   o | o
	   `-------'

  - If using coax cable in a bus topology the J4 jumper must be removed;
    place it on one pin.

  - If using bus topology with twisted pair wiring move the J3
    jumpers so they connect the middle pin and the pins closest to the RJ11
    Connectors.  Also the J4 jumper must be removed; place it on one pin of
    J4 jumper for storage.

  - If using  star topology with twisted pair wiring move the J3
    jumpers so they connect the middle pin and the pins closest to the RJ11
    connectors.


DIP Switches:

	The DIP switches accessible on the accessible end of the card while
	it is installed, is used to set the ARCnet address.  There are 8
	switches.  Use an address from 1 to 254

	==========      =========================
	Switch No.	ARCnet address
	12345678
	==========      =========================
	00000000	FF  	(Don't use this!)
	00000001	FE
	00000010	FD
	...
	11111101	2
	11111110	1
	11111111	0	(Don't use this!)
	==========      =========================

	There is another array of eight DIP switches at the top of the
	card.  There are five labelled MS0-MS4 which seem to control the
	memory address, and another three labelled IO0-IO2 which seem to
	control the base I/O address of the card.

	This was difficult to test by trial and error, and the I/O addresses
	are in a weird order.  This was tested by setting the DIP switches,
	rebooting the computer, and attempting to load ARCETHER at various
	addresses (mostly between 0x200 and 0x400).  The address that caused
	the red transmit LED to blink, is the one that I thought works.

	Also, the address 0x3D0 seem to have a special meaning, since the
	ARCETHER packet driver loaded fine, but without the red LED
	blinking.  I don't know what 0x3D0 is for though.  I recommend using
	an address of 0x300 since Windows may not like addresses below
	0x300.

	=============   ===========
	IO Switch No.   I/O address
	210
	=============   ===========
	111             0x260
	110             0x290
	101             0x2E0
	100             0x2F0
	011             0x300
	010             0x350
	001             0x380
	000             0x3E0
	=============   ===========

	The memory switches set a reserved address space of 0x1000 bytes
	(0x100 segment units, or 4k).  For example if I set an address of
	0xD000, it will use up addresses 0xD000 to 0xD100.

	The memory switches were tested by booting using QEMM386 stealth,
	and using LOADHI to see what address automatically became excluded
	from the upper memory regions, and then attempting to load ARCETHER
	using these addresses.

	I recommend using an ARCnet memory address of 0xD000, and putting
	the EMS page frame at 0xC000 while using QEMM stealth mode.  That
	way, you get contiguous high memory from 0xD100 almost all the way
	the end of the megabyte.

	Memory Switch 0 (MS0) didn't seem to work properly when set to OFF
	on my card.  It could be malfunctioning on my card.  Experiment with
	it ON first, and if it doesn't work, set it to OFF.  (It may be a
	modifier for the 0x200 bit?)

	=============   ============================================
	MS Switch No.
	43210           Memory address
	=============   ============================================
	00001           0xE100  (guessed - was not detected by QEMM)
	00011           0xE000  (guessed - was not detected by QEMM)
	00101           0xDD00
	00111           0xDC00
	01001           0xD900
	01011           0xD800
	01101           0xD500
	01111           0xD400
	10001           0xD100
	10011           0xD000
	10101           0xCD00
	10111           0xCC00
	11001           0xC900 (guessed - crashes tested system)
	11011           0xC800 (guessed - crashes tested system)
	11101           0xC500 (guessed - crashes tested system)
	11111           0xC400 (guessed - crashes tested system)
	=============   ============================================

CNet Technology Inc. (8-bit cards)
==================================

120 Series (8-bit cards)
------------------------
  - from Juergen Seifert <seifert@htwm.de>

This description has been written by Juergen Seifert <seifert@htwm.de>
using information from the following Original CNet Manual

	      "ARCNET USER'S MANUAL for
	      CN120A
	      CN120AB
	      CN120TP
	      CN120ST
	      CN120SBT
	      P/N:12-01-0007
	      Revision 3.00"

ARCNET is a registered trademark of the Datapoint Corporation

- P/N 120A   ARCNET 8 bit XT/AT Star
- P/N 120AB  ARCNET 8 bit XT/AT Bus
- P/N 120TP  ARCNET 8 bit XT/AT Twisted Pair
- P/N 120ST  ARCNET 8 bit XT/AT Star, Twisted Pair
- P/N 120SBT ARCNET 8 bit XT/AT Star, Bus, Twisted Pair

::

    __________________________________________________________________
   |                                                                  |
   |                                                               ___|
   |                                                          LED |___|
   |                                                               ___|
   |                                                            N |   | ID7
   |                                                            o |   | ID6
   |                                                            d | S | ID5
   |                                                            e | W | ID4
   |                     ___________________                    A | 2 | ID3
   |                    |                   |                   d |   | ID2
   |                    |                   |  1 2 3 4 5 6 7 8  d |   | ID1
   |                    |                   | _________________ r |___| ID0
   |                    |      90C65        ||       SW1       |  ____|
   |  JP 8 7            |                   ||_________________| |    |
   |    |o|o|  JP1      |                   |                    | J2 |
   |    |o|o|  |oo|     |                   |         JP 1 1 1   |    |
   |   ______________   |                   |            0 1 2   |____|
   |  |  PROM        |  |___________________|           |o|o|o|  _____|
   |  >  SOCKET      |  JP 6 5 4 3 2                    |o|o|o| | J1  |
   |  |______________|    |o|o|o|o|o|                   |o|o|o| |_____|
   |_____                 |o|o|o|o|o|                   ______________|
	 |                                             |
	 |_____________________________________________|

Legend::

  90C65       ARCNET Probe
  S1  1-5:    Base Memory Address Select
      6-8:    Base I/O Address Select
  S2  1-8:    Node ID Select (ID0-ID7)
  JP1     ROM Enable Select
  JP2     IRQ2
  JP3     IRQ3
  JP4     IRQ4
  JP5     IRQ5
  JP6     IRQ7
  JP7/JP8     ET1, ET2 Timeout Parameters
  JP10/JP11   Coax / Twisted Pair Select  (CN120ST/SBT only)
  JP12        Terminator Select       (CN120AB/ST/SBT only)
  J1      BNC RG62/U Connector        (all except CN120TP)
  J2      Two 6-position Telephone Jack   (CN120TP/ST/SBT only)

Setting one of the switches to Off means "1", On means "0".


Setting the Node ID
^^^^^^^^^^^^^^^^^^^

The eight switches in SW2 are used to set the node ID. Each node attached
to the network must have an unique node ID which must be different from 0.
Switch 1 (ID0) serves as the least significant bit (LSB).

The node ID is the sum of the values of all switches set to "1"
These values are:

   =======  ======  =====
   Switch   Label   Value
   =======  ======  =====
     1      ID0       1
     2      ID1       2
     3      ID2       4
     4      ID3       8
     5      ID4      16
     6      ID5      32
     7      ID6      64
     8      ID7     128
   =======  ======  =====

Some Examples::

    Switch         | Hex     | Decimal
   8 7 6 5 4 3 2 1 | Node ID | Node ID
   ----------------|---------|---------
   0 0 0 0 0 0 0 0 |    not allowed
   0 0 0 0 0 0 0 1 |    1    |    1
   0 0 0 0 0 0 1 0 |    2    |    2
   0 0 0 0 0 0 1 1 |    3    |    3
       . . .       |         |
   0 1 0 1 0 1 0 1 |   55    |   85
       . . .       |         |
   1 0 1 0 1 0 1 0 |   AA    |  170
       . . .       |         |
   1 1 1 1 1 1 0 1 |   FD    |  253
   1 1 1 1 1 1 1 0 |   FE    |  254
   1 1 1 1 1 1 1 1 |   FF    |  255


Setting the I/O Base Address
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The last three switches in switch block SW1 are used to select one
of eight possible I/O Base addresses using the following table::


   Switch      | Hex I/O
    6   7   8  | Address
   ------------|--------
   ON  ON  ON  |  260
   OFF ON  ON  |  290
   ON  OFF ON  |  2E0  (Manufacturer's default)
   OFF OFF ON  |  2F0
   ON  ON  OFF |  300
   OFF ON  OFF |  350
   ON  OFF OFF |  380
   OFF OFF OFF |  3E0


Setting the Base Memory (RAM) buffer Address
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The memory buffer (RAM) requires 2K. The base of this buffer can be
located in any of eight positions. The address of the Boot Prom is
memory base + 8K or memory base + 0x2000.
Switches 1-5 of switch block SW1 select the Memory Base address.

::

   Switch              | Hex RAM | Hex ROM
    1   2   3   4   5  | Address | Address *)
   --------------------|---------|-----------
   ON  ON  ON  ON  ON  |  C0000  |  C2000
   ON  ON  OFF ON  ON  |  C4000  |  C6000
   ON  ON  ON  OFF ON  |  CC000  |  CE000
   ON  ON  OFF OFF ON  |  D0000  |  D2000  (Manufacturer's default)
   ON  ON  ON  ON  OFF |  D4000  |  D6000
   ON  ON  OFF ON  OFF |  D8000  |  DA000
   ON  ON  ON  OFF OFF |  DC000  |  DE000
   ON  ON  OFF OFF OFF |  E0000  |  E2000

  *) To enable the Boot ROM install the jumper JP1

.. note::

      Since the switches 1 and 2 are always set to ON it may be possible
      that they can be used to add an offset of 2K, 4K or 6K to the base
      address, but this feature is not documented in the manual and I
      haven't tested it yet.


Setting the Interrupt Line
^^^^^^^^^^^^^^^^^^^^^^^^^^

To select a hardware interrupt level install one (only one!) of the jumpers
JP2, JP3, JP4, JP5, JP6. JP2 is the default::

   Jumper | IRQ
   -------|-----
     2    |  2
     3    |  3
     4    |  4
     5    |  5
     6    |  7


Setting the Internal Terminator on CN120AB/TP/SBT
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The jumper JP12 is used to enable the internal terminator::

			 -----
       0                |  0  |
     -----   ON         |     |  ON
    |  0  |             |  0  |
    |     |  OFF         -----   OFF
    |  0  |                0
     -----
   Terminator          Terminator
    disabled            enabled


Selecting the Connector Type on CN120ST/SBT
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

::

     JP10    JP11        JP10    JP11
			 -----   -----
       0       0        |  0  | |  0  |
     -----   -----      |     | |     |
    |  0  | |  0  |     |  0  | |  0  |
    |     | |     |      -----   -----
    |  0  | |  0  |        0       0
     -----   -----
     Coaxial Cable       Twisted Pair Cable
       (Default)


Setting the Timeout Parameters
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The jumpers labeled EXT1 and EXT2 are used to determine the timeout
parameters. These two jumpers are normally left open.


CNet Technology Inc. (16-bit cards)
===================================

160 Series (16-bit cards)
-------------------------
  - from Juergen Seifert <seifert@htwm.de>

This description has been written by Juergen Seifert <seifert@htwm.de>
using information from the following Original CNet Manual

	      "ARCNET USER'S MANUAL for
	      CN160A CN160AB CN160TP
	      P/N:12-01-0006 Revision 3.00"

ARCNET is a registered trademark of the Datapoint Corporation

- P/N 160A   ARCNET 16 bit XT/AT Star
- P/N 160AB  ARCNET 16 bit XT/AT Bus
- P/N 160TP  ARCNET 16 bit XT/AT Twisted Pair

::

   ___________________________________________________________________
  <                             _________________________          ___|
  >               |oo| JP2     |                         |    LED |___|
  <               |oo| JP1     |        9026             |    LED |___|
  >                            |_________________________|         ___|
  <                                                             N |   | ID7
  >                                                      1      o |   | ID6
  <                                    1 2 3 4 5 6 7 8 9 0      d | S | ID5
  >         _______________           _____________________     e | W | ID4
  <        |     PROM      |         |         SW1         |    A | 2 | ID3
  >        >    SOCKET     |         |_____________________|    d |   | ID2
  <        |_______________|          | IO-Base   | MEM   |     d |   | ID1
  >                                                             r |___| ID0
  <                                                               ____|
  >                                                              |    |
  <                                                              | J1 |
  >                                                              |    |
  <                                                              |____|
  >                            1 1 1 1                                |
  <  3 4 5 6 7      JP     8 9 0 1 2 3                                |
  > |o|o|o|o|o|           |o|o|o|o|o|o|                               |
  < |o|o|o|o|o| __        |o|o|o|o|o|o|                    ___________|
  >            |  |                                       |
  <____________|  |_______________________________________|

Legend::

  9026            ARCNET Probe
  SW1 1-6:    Base I/O Address Select
      7-10:   Base Memory Address Select
  SW2 1-8:    Node ID Select (ID0-ID7)
  JP1/JP2     ET1, ET2 Timeout Parameters
  JP3-JP13    Interrupt Select
  J1      BNC RG62/U Connector        (CN160A/AB only)
  J1      Two 6-position Telephone Jack   (CN160TP only)
  LED

Setting one of the switches to Off means "1", On means "0".


Setting the Node ID
^^^^^^^^^^^^^^^^^^^

The eight switches in SW2 are used to set the node ID. Each node attached
to the network must have an unique node ID which must be different from 0.
Switch 1 (ID0) serves as the least significant bit (LSB).

The node ID is the sum of the values of all switches set to "1"
These values are::

   Switch | Label | Value
   -------|-------|-------
     1    | ID0   |   1
     2    | ID1   |   2
     3    | ID2   |   4
     4    | ID3   |   8
     5    | ID4   |  16
     6    | ID5   |  32
     7    | ID6   |  64
     8    | ID7   | 128

Some Examples::

    Switch         | Hex     | Decimal
   8 7 6 5 4 3 2 1 | Node ID | Node ID
   ----------------|---------|---------
   0 0 0 0 0 0 0 0 |    not allowed
   0 0 0 0 0 0 0 1 |    1    |    1
   0 0 0 0 0 0 1 0 |    2    |    2
   0 0 0 0 0 0 1 1 |    3    |    3
       . . .       |         |
   0 1 0 1 0 1 0 1 |   55    |   85
       . . .       |         |
   1 0 1 0 1 0 1 0 |   AA    |  170
       . . .       |         |
   1 1 1 1 1 1 0 1 |   FD    |  253
   1 1 1 1 1 1 1 0 |   FE    |  254
   1 1 1 1 1 1 1 1 |   FF    |  255


Setting the I/O Base Address
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The first six switches in switch block SW1 are used to select the I/O Base
address using the following table::

	     Switch        | Hex I/O
    1   2   3   4   5   6  | Address
   ------------------------|--------
   OFF ON  ON  OFF OFF ON  |  260
   OFF ON  OFF ON  ON  OFF |  290
   OFF ON  OFF OFF OFF ON  |  2E0  (Manufacturer's default)
   OFF ON  OFF OFF OFF OFF |  2F0
   OFF OFF ON  ON  ON  ON  |  300
   OFF OFF ON  OFF ON  OFF |  350
   OFF OFF OFF ON  ON  ON  |  380
   OFF OFF OFF OFF OFF ON  |  3E0

Note: Other IO-Base addresses seem to be selectable, but only the above
      combinations are documented.


Setting the Base Memory (RAM) buffer Address
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The switches 7-10 of switch block SW1 are used to select the Memory
Base address of the RAM (2K) and the PROM::

   Switch          | Hex RAM | Hex ROM
    7   8   9  10  | Address | Address
   ----------------|---------|-----------
   OFF OFF ON  ON  |  C0000  |  C8000
   OFF OFF ON  OFF |  D0000  |  D8000 (Default)
   OFF OFF OFF ON  |  E0000  |  E8000

.. note::

      Other MEM-Base addresses seem to be selectable, but only the above
      combinations are documented.


Setting the Interrupt Line
^^^^^^^^^^^^^^^^^^^^^^^^^^

To select a hardware interrupt level install one (only one!) of the jumpers
JP3 through JP13 using the following table::

   Jumper | IRQ
   -------|-----------------
     3    |  14
     4    |  15
     5    |  12
     6    |  11
     7    |  10
     8    |   3
     9    |   4
    10    |   5
    11    |   6
    12    |   7
    13    |   2 (=9) Default!

.. note::

       - Do not use JP11=IRQ6, it may conflict with your Floppy Disk
	 Controller
       - Use JP3=IRQ14 only, if you don't have an IDE-, MFM-, or RLL-
	 Hard Disk, it may conflict with their controllers


Setting the Timeout Parameters
------------------------------

The jumpers labeled JP1 and JP2 are used to determine the timeout
parameters. These two jumpers are normally left open.


Lantech
=======

8-bit card, unknown model
-------------------------
  - from Vlad Lungu <vlungu@ugal.ro> - his e-mail address seemed broken at
    the time I tried to reach him.  Sorry Vlad, if you didn't get my reply.

::

   ________________________________________________________________
   |   1         8                                                 |
   |   ___________                                               __|
   |   |   SW1    |                                         LED |__|
   |   |__________|                                                |
   |                                                            ___|
   |                _____________________                       |S | 8
   |                |                   |                       |W |
   |                |                   |                       |2 |
   |                |                   |                       |__| 1
   |                |      UM9065L      |     |o|  JP4         ____|____
   |                |                   |     |o|              |  CN    |
   |                |                   |                      |________|
   |                |                   |                          |
   |                |___________________|                          |
   |                                                               |
   |                                                               |
   |      _____________                                            |
   |      |            |                                           |
   |      |    PROM    |        |ooooo|  JP6                       |
   |      |____________|        |ooooo|                            |
   |_____________                                             _   _|
		|____________________________________________| |__|


UM9065L : ARCnet Controller

SW 1    : Shared Memory Address and I/O Base

::

	ON=0

	12345|Memory Address
	-----|--------------
	00001|  D4000
	00010|  CC000
	00110|  D0000
	01110|  D1000
	01101|  D9000
	10010|  CC800
	10011|  DC800
	11110|  D1800

It seems that the bits are considered in reverse order.  Also, you must
observe that some of those addresses are unusual and I didn't probe them; I
used a memory dump in DOS to identify them.  For the 00000 configuration and
some others that I didn't write here the card seems to conflict with the
video card (an S3 GENDAC). I leave the full decoding of those addresses to
you.

::

	678| I/O Address
	---|------------
	000|    260
	001|    failed probe
	010|    2E0
	011|    380
	100|    290
	101|    350
	110|    failed probe
	111|    3E0

  SW 2  : Node ID (binary coded)

  JP 4  : Boot PROM enable   CLOSE - enabled
			     OPEN  - disabled

  JP 6  : IRQ set (ONLY ONE jumper on 1-5 for IRQ 2-6)


Acer
====

8-bit card, Model 5210-003
--------------------------

  - from Vojtech Pavlik <vojtech@suse.cz> using portions of the existing
    arcnet-hardware file.

This is a 90C26 based card.  Its configuration seems similar to the SMC
PC100, but has some additional jumpers I don't know the meaning of.

::

	       __
	      |  |
   ___________|__|_________________________
  |         |      |                       |
  |         | BNC  |                       |
  |         |______|                    ___|
  |  _____________________             |___
  | |                     |                |
  | | Hybrid IC           |                |
  | |                     |       o|o J1   |
  | |_____________________|       8|8      |
  |                               8|8 J5   |
  |                               o|o      |
  |                               8|8      |
  |__                             8|8      |
 (|__| LED                        o|o      |
  |                               8|8      |
  |                               8|8 J15  |
  |                                        |
  |                    _____               |
  |                   |     |   _____      |
  |                   |     |  |     |  ___|
  |                   |     |  |     | |
  |  _____            | ROM |  | UFS | |
  | |     |           |     |  |     | |
  | |     |     ___   |     |  |     | |
  | |     |    |   |  |__.__|  |__.__| |
  | | NCR |    |XTL|   _____    _____  |
  | |     |    |___|  |     |  |     | |
  | |90C26|           |     |  |     | |
  | |     |           | RAM |  | UFS | |
  | |     | J17 o|o   |     |  |     | |
  | |     | J16 o|o   |     |  |     | |
  | |__.__|           |__.__|  |__.__| |
  |  ___                               |
  | |   |8                             |
  | |SW2|                              |
  | |   |                              |
  | |___|1                             |
  |  ___                               |
  | |   |10           J18 o|o          |
  | |   |                 o|o          |
  | |SW1|                 o|o          |
  | |   |             J21 o|o          |
  | |___|1                             |
  |                                    |
  |____________________________________|


Legend::

  90C26       ARCNET Chip
  XTL         20 MHz Crystal
  SW1 1-6     Base I/O Address Select
      7-10    Memory Address Select
  SW2 1-8     Node ID Select (ID0-ID7)
  J1-J5       IRQ Select
  J6-J21      Unknown (Probably extra timeouts & ROM enable ...)
  LED1        Activity LED
  BNC         Coax connector (STAR ARCnet)
  RAM         2k of SRAM
  ROM         Boot ROM socket
  UFS         Unidentified Flying Sockets


Setting the Node ID
^^^^^^^^^^^^^^^^^^^

The eight switches in SW2 are used to set the node ID. Each node attached
to the network must have an unique node ID which must not be 0.
Switch 1 (ID0) serves as the least significant bit (LSB).

Setting one of the switches to OFF means "1", ON means "0".

The node ID is the sum of the values of all switches set to "1"
These values are::

   Switch | Value
   -------|-------
     1    |   1
     2    |   2
     3    |   4
     4    |   8
     5    |  16
     6    |  32
     7    |  64
     8    | 128

Don't set this to 0 or 255; these values are reserved.


Setting the I/O Base Address
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The switches 1 to 6 of switch block SW1 are used to select one
of 32 possible I/O Base addresses using the following tables::

	  | Hex
   Switch | Value
   -------|-------
     1    | 200
     2    | 100
     3    |  80
     4    |  40
     5    |  20
     6    |  10

The I/O address is sum of all switches set to "1". Remember that
the I/O address space below 0x200 is RESERVED for mainboard, so
switch 1 should be ALWAYS SET TO OFF.


Setting the Base Memory (RAM) buffer Address
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The memory buffer (RAM) requires 2K. The base of this buffer can be
located in any of sixteen positions. However, the addresses below
A0000 are likely to cause system hang because there's main RAM.

Jumpers 7-10 of switch block SW1 select the Memory Base address::

   Switch          | Hex RAM
    7   8   9  10  | Address
   ----------------|---------
   OFF OFF OFF OFF |  F0000 (conflicts with main BIOS)
   OFF OFF OFF ON  |  E0000
   OFF OFF ON  OFF |  D0000
   OFF OFF ON  ON  |  C0000 (conflicts with video BIOS)
   OFF ON  OFF OFF |  B0000 (conflicts with mono video)
   OFF ON  OFF ON  |  A0000 (conflicts with graphics)


Setting the Interrupt Line
^^^^^^^^^^^^^^^^^^^^^^^^^^

Jumpers 1-5 of the jumper block J1 control the IRQ level. ON means
shorted, OFF means open::

    Jumper              |  IRQ
    1   2   3   4   5   |
   ----------------------------
    ON  OFF OFF OFF OFF |  7
    OFF ON  OFF OFF OFF |  5
    OFF OFF ON  OFF OFF |  4
    OFF OFF OFF ON  OFF |  3
    OFF OFF OFF OFF ON  |  2


Unknown jumpers & sockets
^^^^^^^^^^^^^^^^^^^^^^^^^

I know nothing about these. I just guess that J16&J17 are timeout
jumpers and maybe one of J18-J21 selects ROM. Also J6-J10 and
J11-J15 are connecting IRQ2-7 to some pins on the UFSs. I can't
guess the purpose.

Datapoint?
==========

LAN-ARC-8, an 8-bit card
------------------------

  - from Vojtech Pavlik <vojtech@suse.cz>

This is another SMC 90C65-based ARCnet card. I couldn't identify the
manufacturer, but it might be DataPoint, because the card has the
original arcNet logo in its upper right corner.

::

	  _______________________________________________________
	 |                         _________                     |
	 |                        |   SW2   | ON      arcNet     |
	 |                        |_________| OFF             ___|
	 |  _____________         1 ______  8                |   | 8
	 | |             | SW1     | XTAL | ____________     | S |
	 | > RAM (2k)    |         |______||            |    | W |
	 | |_____________|                 |      H     |    | 3 |
	 |                        _________|_____ y     |    |___| 1
	 |  _________            |         |     |b     |        |
	 | |_________|           |         |     |r     |        |
	 |                       |     SMC |     |i     |        |
	 |                       |    90C65|     |d     |        |
	 |  _________            |         |     |      |        |
	 | |   SW1   | ON        |         |     |I     |        |
	 | |_________| OFF       |_________|_____/C     |   _____|
	 |  1       8                      |            |  |     |___
	 |  ______________                 |            |  | BNC |___|
	 | |              |                |____________|  |_____|
	 | > EPROM SOCKET |              _____________           |
	 | |______________|             |_____________|          |
	 |                                         ______________|
	 |                                        |
	 |________________________________________|

Legend::

  90C65       ARCNET Chip
  SW1 1-5:    Base Memory Address Select
      6-8:    Base I/O Address Select
  SW2 1-8:    Node ID Select
  SW3 1-5:    IRQ Select
      6-7:    Extra Timeout
      8  :    ROM Enable
  BNC         Coax connector
  XTAL        20 MHz Crystal


Setting the Node ID
^^^^^^^^^^^^^^^^^^^

The eight switches in SW3 are used to set the node ID. Each node attached
to the network must have an unique node ID which must not be 0.
Switch 1 serves as the least significant bit (LSB).

Setting one of the switches to Off means "1", On means "0".

The node ID is the sum of the values of all switches set to "1"
These values are::

   Switch | Value
   -------|-------
     1    |   1
     2    |   2
     3    |   4
     4    |   8
     5    |  16
     6    |  32
     7    |  64
     8    | 128


Setting the I/O Base Address
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The last three switches in switch block SW1 are used to select one
of eight possible I/O Base addresses using the following table::


   Switch      | Hex I/O
    6   7   8  | Address
   ------------|--------
   ON  ON  ON  |  260
   OFF ON  ON  |  290
   ON  OFF ON  |  2E0  (Manufacturer's default)
   OFF OFF ON  |  2F0
   ON  ON  OFF |  300
   OFF ON  OFF |  350
   ON  OFF OFF |  380
   OFF OFF OFF |  3E0


Setting the Base Memory (RAM) buffer Address
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The memory buffer (RAM) requires 2K. The base of this buffer can be
located in any of eight positions. The address of the Boot Prom is
memory base + 0x2000.

Jumpers 3-5 of switch block SW1 select the Memory Base address.

::

   Switch              | Hex RAM | Hex ROM
    1   2   3   4   5  | Address | Address *)
   --------------------|---------|-----------
   ON  ON  ON  ON  ON  |  C0000  |  C2000
   ON  ON  OFF ON  ON  |  C4000  |  C6000
   ON  ON  ON  OFF ON  |  CC000  |  CE000
   ON  ON  OFF OFF ON  |  D0000  |  D2000  (Manufacturer's default)
   ON  ON  ON  ON  OFF |  D4000  |  D6000
   ON  ON  OFF ON  OFF |  D8000  |  DA000
   ON  ON  ON  OFF OFF |  DC000  |  DE000
   ON  ON  OFF OFF OFF |  E0000  |  E2000

  *) To enable the Boot ROM set the switch 8 of switch block SW3 to position ON.

The switches 1 and 2 probably add 0x0800 and 0x1000 to RAM base address.


Setting the Interrupt Line
^^^^^^^^^^^^^^^^^^^^^^^^^^

Switches 1-5 of the switch block SW3 control the IRQ level::

    Jumper              |  IRQ
    1   2   3   4   5   |
   ----------------------------
    ON  OFF OFF OFF OFF |  3
    OFF ON  OFF OFF OFF |  4
    OFF OFF ON  OFF OFF |  5
    OFF OFF OFF ON  OFF |  7
    OFF OFF OFF OFF ON  |  2


Setting the Timeout Parameters
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The switches 6-7 of the switch block SW3 are used to determine the timeout
parameters.  These two switches are normally left in the OFF position.


Topware
=======

8-bit card, TA-ARC/10
---------------------

  - from Vojtech Pavlik <vojtech@suse.cz>

This is another very similar 90C65 card. Most of the switches and jumpers
are the same as on other clones.

::

   _____________________________________________________________________
  |  ___________   |                         |            ______        |
  | |SW2 NODE ID|  |                         |           | XTAL |       |
  | |___________|  |  Hybrid IC              |           |______|       |
  |  ___________   |                         |                        __|
  | |SW1 MEM+I/O|  |_________________________|                   LED1|__|)
  | |___________|           1 2                                         |
  |                     J3 |o|o| TIMEOUT                          ______|
  |     ______________     |o|o|                                 |      |
  |    |              |  ___________________                     | RJ   |
  |    > EPROM SOCKET | |                   \                    |------|
  |J2  |______________| |                    |                   |      |
  ||o|                  |                    |                   |______|
  ||o| ROM ENABLE       |        SMC         |    _________             |
  |     _____________   |       90C65        |   |_________|       _____|
  |    |             |  |                    |                    |     |___
  |    > RAM (2k)    |  |                    |                    | BNC |___|
  |    |_____________|  |                    |                    |_____|
  |                     |____________________|                          |
  | ________ IRQ 2 3 4 5 7                  ___________                 |
  ||________|   |o|o|o|o|o|                |___________|                |
  |________   J1|o|o|o|o|o|                               ______________|
	   |                                             |
	   |_____________________________________________|

Legend::

  90C65       ARCNET Chip
  XTAL        20 MHz Crystal
  SW1 1-5     Base Memory Address Select
      6-8     Base I/O Address Select
  SW2 1-8     Node ID Select (ID0-ID7)
  J1          IRQ Select
  J2          ROM Enable
  J3          Extra Timeout
  LED1        Activity LED
  BNC         Coax connector (BUS ARCnet)
  RJ          Twisted Pair Connector (daisy chain)


Setting the Node ID
^^^^^^^^^^^^^^^^^^^

The eight switches in SW2 are used to set the node ID. Each node attached to
the network must have an unique node ID which must not be 0.  Switch 1 (ID0)
serves as the least significant bit (LSB).

Setting one of the switches to Off means "1", On means "0".

The node ID is the sum of the values of all switches set to "1"
These values are::

   Switch | Label | Value
   -------|-------|-------
     1    | ID0   |   1
     2    | ID1   |   2
     3    | ID2   |   4
     4    | ID3   |   8
     5    | ID4   |  16
     6    | ID5   |  32
     7    | ID6   |  64
     8    | ID7   | 128

Setting the I/O Base Address
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The last three switches in switch block SW1 are used to select one
of eight possible I/O Base addresses using the following table::


   Switch      | Hex I/O
    6   7   8  | Address
   ------------|--------
   ON  ON  ON  |  260  (Manufacturer's default)
   OFF ON  ON  |  290
   ON  OFF ON  |  2E0
   OFF OFF ON  |  2F0
   ON  ON  OFF |  300
   OFF ON  OFF |  350
   ON  OFF OFF |  380
   OFF OFF OFF |  3E0


Setting the Base Memory (RAM) buffer Address
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The memory buffer (RAM) requires 2K. The base of this buffer can be
located in any of eight positions. The address of the Boot Prom is
memory base + 0x2000.

Jumpers 3-5 of switch block SW1 select the Memory Base address.

::

   Switch              | Hex RAM | Hex ROM
    1   2   3   4   5  | Address | Address *)
   --------------------|---------|-----------
   ON  ON  ON  ON  ON  |  C0000  |  C2000
   ON  ON  OFF ON  ON  |  C4000  |  C6000  (Manufacturer's default)
   ON  ON  ON  OFF ON  |  CC000  |  CE000
   ON  ON  OFF OFF ON  |  D0000  |  D2000
   ON  ON  ON  ON  OFF |  D4000  |  D6000
   ON  ON  OFF ON  OFF |  D8000  |  DA000
   ON  ON  ON  OFF OFF |  DC000  |  DE000
   ON  ON  OFF OFF OFF |  E0000  |  E2000

   *) To enable the Boot ROM short the jumper J2.

The jumpers 1 and 2 probably add 0x0800 and 0x1000 to RAM address.


Setting the Interrupt Line
^^^^^^^^^^^^^^^^^^^^^^^^^^

Jumpers 1-5 of the jumper block J1 control the IRQ level.  ON means
shorted, OFF means open::

    Jumper              |  IRQ
    1   2   3   4   5   |
   ----------------------------
    ON  OFF OFF OFF OFF |  2
    OFF ON  OFF OFF OFF |  3
    OFF OFF ON  OFF OFF |  4
    OFF OFF OFF ON  OFF |  5
    OFF OFF OFF OFF ON  |  7


Setting the Timeout Parameters
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The jumpers J3 are used to set the timeout parameters. These two
jumpers are normally left open.

Thomas-Conrad
=============

Model #500-6242-0097 REV A (8-bit card)
---------------------------------------

  - from Lars Karlsson <100617.3473@compuserve.com>

::

     ________________________________________________________
   |          ________   ________                           |_____
   |         |........| |........|                            |
   |         |________| |________|                         ___|
   |            SW 3       SW 1                           |   |
   |         Base I/O   Base Addr.                Station |   |
   |                                              address |   |
   |    ______                                    switch  |   |
   |   |      |                                           |   |
   |   |      |                                           |___|
   |   |      |                                 ______        |___._
   |   |______|                                |______|         ____| BNC
   |                                            Jumper-        _____| Connector
   |   Main chip                                block  _    __|   '
   |                                                  | |  |    RJ Connector
   |                                                  |_|  |    with 110 Ohm
   |                                                       |__  Terminator
   |    ___________                                         __|
   |   |...........|                                       |    RJ-jack
   |   |...........|    _____                              |    (unused)
   |   |___________|   |_____|                             |__
   |  Boot PROM socket IRQ-jumpers                            |_  Diagnostic
   |________                                       __          _| LED (red)
	    | | | | | | | | | | | | | | | | | | | |  |        |
	    | | | | | | | | | | | | | | | | | | | |  |________|
							      |
							      |

And here are the settings for some of the switches and jumpers on the cards.

::

	    I/O

	   1 2 3 4 5 6 7 8

  2E0----- 0 0 0 1 0 0 0 1
  2F0----- 0 0 0 1 0 0 0 0
  300----- 0 0 0 0 1 1 1 1
  350----- 0 0 0 0 1 1 1 0

"0" in the above example means switch is off "1" means that it is on.

::

      ShMem address.

	1 2 3 4 5 6 7 8

  CX00--0 0 1 1 | |   |
  DX00--0 0 1 0       |
  X000--------- 1 1   |
  X400--------- 1 0   |
  X800--------- 0 1   |
  XC00--------- 0 0
  ENHANCED----------- 1
  COMPATIBLE--------- 0

::

	 IRQ


     3 4 5 7 2
     . . . . .
     . . . . .


There is a DIP-switch with 8 switches, used to set the shared memory address
to be used. The first 6 switches set the address, the 7th doesn't have any
function, and the 8th switch is used to select "compatible" or "enhanced".
When I got my two cards, one of them had this switch set to "enhanced". That
card didn't work at all, it wasn't even recognized by the driver. The other
card had this switch set to "compatible" and it behaved absolutely normally. I
guess that the switch on one of the cards, must have been changed accidentally
when the card was taken out of its former host. The question remains
unanswered, what is the purpose of the "enhanced" position?

[Avery's note: "enhanced" probably either disables shared memory (use IO
ports instead) or disables IO ports (use memory addresses instead).  This
varies by the type of card involved.  I fail to see how either of these
enhance anything.  Send me more detailed information about this mode, or
just use "compatible" mode instead.]

Waterloo Microsystems Inc. ??
=============================

8-bit card (C) 1985
-------------------
  - from Robert Michael Best <rmb117@cs.usask.ca>

[Avery's note: these don't work with my driver for some reason.  These cards
SEEM to have settings similar to the PDI508Plus, which is
software-configured and doesn't work with my driver either.  The "Waterloo
chip" is a boot PROM, probably designed specifically for the University of
Waterloo.  If you have any further information about this card, please
e-mail me.]

The probe has not been able to detect the card on any of the J2 settings,
and I tried them again with the "Waterloo" chip removed.

::

   _____________________________________________________________________
  | \/  \/              ___  __ __                                      |
  | C4  C4     |^|     | M ||  ^  ||^|                                  |
  | --  --     |_|     | 5 ||     || | C3                               |
  | \/  \/      C10    |___||     ||_|                                  |
  | C4  C4             _  _ |     |                 ??                  |
  | --  --            | \/ ||     |                                     |
  |                   |    ||     |                                     |
  |                   |    ||  C1 |                                     |
  |                   |    ||     |  \/                            _____|
  |                   | C6 ||     |  C9                           |     |___
  |                   |    ||     |  --                           | BNC |___|
  |                   |    ||     |          >C7|                 |_____|
  |                   |    ||     |                                     |
  | __ __             |____||_____|       1 2 3     6                   |
  ||  ^  |     >C4|                      |o|o|o|o|o|o| J2    >C4|       |
  ||     |                               |o|o|o|o|o|o|                  |
  || C2  |     >C4|                                          >C4|       |
  ||     |                                   >C8|                       |
  ||     |       2 3 4 5 6 7  IRQ                            >C4|       |
  ||_____|      |o|o|o|o|o|o| J3                                        |
  |_______      |o|o|o|o|o|o|                            _______________|
	  |                                             |
	  |_____________________________________________|

  C1 -- "COM9026
	 SMC 8638"
	In a chip socket.

  C2 -- "@Copyright
	 Waterloo Microsystems Inc.
	 1985"
	In a chip Socket with info printed on a label covering a round window
	showing the circuit inside. (The window indicates it is an EPROM chip.)

  C3 -- "COM9032
	 SMC 8643"
	In a chip socket.

  C4 -- "74LS"
	9 total no sockets.

  M5 -- "50006-136
	 20.000000 MHZ
	 MTQ-T1-S3
	 0 M-TRON 86-40"
	Metallic case with 4 pins, no socket.

  C6 -- "MOSTEK@TC8643
	 MK6116N-20
	 MALAYSIA"
	No socket.

  C7 -- No stamp or label but in a 20 pin chip socket.

  C8 -- "PAL10L8CN
	 8623"
	In a 20 pin socket.

  C9 -- "PAl16R4A-2CN
	 8641"
	In a 20 pin socket.

  C10 -- "M8640
	    NMC
	  9306N"
	 In an 8 pin socket.

  ?? -- Some components on a smaller board and attached with 20 pins all
	along the side closest to the BNC connector.  The are coated in a dark
	resin.

On the board there are two jumper banks labeled J2 and J3. The
manufacturer didn't put a J1 on the board. The two boards I have both
came with a jumper box for each bank.

::

  J2 -- Numbered 1 2 3 4 5 6.
	4 and 5 are not stamped due to solder points.

  J3 -- IRQ 2 3 4 5 6 7

The board itself has a maple leaf stamped just above the irq jumpers
and "-2 46-86" beside C2. Between C1 and C6 "ASS 'Y 300163" and "@1986
CORMAN CUSTOM ELECTRONICS CORP." stamped just below the BNC connector.
Below that "MADE IN CANADA"

No Name
=======

8-bit cards, 16-bit cards
-------------------------

  - from Juergen Seifert <seifert@htwm.de>

I have named this ARCnet card "NONAME", since there is no name of any
manufacturer on the Installation manual nor on the shipping box. The only
hint to the existence of a manufacturer at all is written in copper,
it is "Made in Taiwan"

This description has been written by Juergen Seifert <seifert@htwm.de>
using information from the Original

		    "ARCnet Installation Manual"

::

    ________________________________________________________________
   | |STAR| BUS| T/P|                                               |
   | |____|____|____|                                               |
   |                            _____________________               |
   |                           |                     |              |
   |                           |                     |              |
   |                           |                     |              |
   |                           |        SMC          |              |
   |                           |                     |              |
   |                           |       COM90C65      |              |
   |                           |                     |              |
   |                           |                     |              |
   |                           |__________-__________|              |
   |                                                           _____|
   |      _______________                                     |  CN |
   |     | PROM          |                                    |_____|
   |     > SOCKET        |                                          |
   |     |_______________|         1 2 3 4 5 6 7 8  1 2 3 4 5 6 7 8 |
   |                               _______________  _______________ |
   |           |o|o|o|o|o|o|o|o|  |      SW1      ||      SW2      ||
   |           |o|o|o|o|o|o|o|o|  |_______________||_______________||
   |___         2 3 4 5 7 E E R        Node ID       IOB__|__MEM____|
       |        \ IRQ   / T T O                      |
       |__________________1_2_M______________________|

Legend::

  COM90C65:       ARCnet Probe
  S1  1-8:    Node ID Select
  S2  1-3:    I/O Base Address Select
      4-6:    Memory Base Address Select
      7-8:    RAM Offset Select
  ET1, ET2    Extended Timeout Select
  ROM     ROM Enable Select
  CN              RG62 Coax Connector
  STAR| BUS | T/P Three fields for placing a sign (colored circle)
		  indicating the topology of the card

Setting one of the switches to Off means "1", On means "0".


Setting the Node ID
^^^^^^^^^^^^^^^^^^^

The eight switches in group SW1 are used to set the node ID.
Each node attached to the network must have an unique node ID which
must be different from 0.
Switch 8 serves as the least significant bit (LSB).

The node ID is the sum of the values of all switches set to "1"
These values are::

    Switch | Value
    -------|-------
      8    |   1
      7    |   2
      6    |   4
      5    |   8
      4    |  16
      3    |  32
      2    |  64
      1    | 128

Some Examples::

    Switch         | Hex     | Decimal
   1 2 3 4 5 6 7 8 | Node ID | Node ID
   ----------------|---------|---------
   0 0 0 0 0 0 0 0 |    not allowed
   0 0 0 0 0 0 0 1 |    1    |    1
   0 0 0 0 0 0 1 0 |    2    |    2
   0 0 0 0 0 0 1 1 |    3    |    3
       . . .       |         |
   0 1 0 1 0 1 0 1 |   55    |   85
       . . .       |         |
   1 0 1 0 1 0 1 0 |   AA    |  170
       . . .       |         |
   1 1 1 1 1 1 0 1 |   FD    |  253
   1 1 1 1 1 1 1 0 |   FE    |  254
   1 1 1 1 1 1 1 1 |   FF    |  255


Setting the I/O Base Address
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The first three switches in switch group SW2 are used to select one
of eight possible I/O Base addresses using the following table::

   Switch      | Hex I/O
    1   2   3  | Address
   ------------|--------
   ON  ON  ON  |  260
   ON  ON  OFF |  290
   ON  OFF ON  |  2E0  (Manufacturer's default)
   ON  OFF OFF |  2F0
   OFF ON  ON  |  300
   OFF ON  OFF |  350
   OFF OFF ON  |  380
   OFF OFF OFF |  3E0


Setting the Base Memory (RAM) buffer Address
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The memory buffer requires 2K of a 16K block of RAM. The base of this
16K block can be located in any of eight positions.
Switches 4-6 of switch group SW2 select the Base of the 16K block.
Within that 16K address space, the buffer may be assigned any one of four
positions, determined by the offset, switches 7 and 8 of group SW2.

::

   Switch     | Hex RAM | Hex ROM
   4 5 6  7 8 | Address | Address *)
   -----------|---------|-----------
   0 0 0  0 0 |  C0000  |  C2000
   0 0 0  0 1 |  C0800  |  C2000
   0 0 0  1 0 |  C1000  |  C2000
   0 0 0  1 1 |  C1800  |  C2000
	      |         |
   0 0 1  0 0 |  C4000  |  C6000
   0 0 1  0 1 |  C4800  |  C6000
   0 0 1  1 0 |  C5000  |  C6000
   0 0 1  1 1 |  C5800  |  C6000
	      |         |
   0 1 0  0 0 |  CC000  |  CE000
   0 1 0  0 1 |  CC800  |  CE000
   0 1 0  1 0 |  CD000  |  CE000
   0 1 0  1 1 |  CD800  |  CE000
	      |         |
   0 1 1  0 0 |  D0000  |  D2000  (Manufacturer's default)
   0 1 1  0 1 |  D0800  |  D2000
   0 1 1  1 0 |  D1000  |  D2000
   0 1 1  1 1 |  D1800  |  D2000
	      |         |
   1 0 0  0 0 |  D4000  |  D6000
   1 0 0  0 1 |  D4800  |  D6000
   1 0 0  1 0 |  D5000  |  D6000
   1 0 0  1 1 |  D5800  |  D6000
	      |         |
   1 0 1  0 0 |  D8000  |  DA000
   1 0 1  0 1 |  D8800  |  DA000
   1 0 1  1 0 |  D9000  |  DA000
   1 0 1  1 1 |  D9800  |  DA000
	      |         |
   1 1 0  0 0 |  DC000  |  DE000
   1 1 0  0 1 |  DC800  |  DE000
   1 1 0  1 0 |  DD000  |  DE000
   1 1 0  1 1 |  DD800  |  DE000
	      |         |
   1 1 1  0 0 |  E0000  |  E2000
   1 1 1  0 1 |  E0800  |  E2000
   1 1 1  1 0 |  E1000  |  E2000
   1 1 1  1 1 |  E1800  |  E2000

   *) To enable the 8K Boot PROM install the jumper ROM.
      The default is jumper ROM not installed.


Setting Interrupt Request Lines (IRQ)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

To select a hardware interrupt level set one (only one!) of the jumpers
IRQ2, IRQ3, IRQ4, IRQ5 or IRQ7. The manufacturer's default is IRQ2.


Setting the Timeouts
^^^^^^^^^^^^^^^^^^^^

The two jumpers labeled ET1 and ET2 are used to determine the timeout
parameters (response and reconfiguration time). Every node in a network
must be set to the same timeout values.

::

   ET1 ET2 | Response Time (us) | Reconfiguration Time (ms)
   --------|--------------------|--------------------------
   Off Off |        78          |          840   (Default)
   Off On  |       285          |         1680
   On  Off |       563          |         1680
   On  On  |      1130          |         1680

On means jumper installed, Off means jumper not installed


16-BIT ARCNET
-------------

The manual of my 8-Bit NONAME ARCnet Card contains another description
of a 16-Bit Coax / Twisted Pair Card. This description is incomplete,
because there are missing two pages in the manual booklet. (The table
of contents reports pages ... 2-9, 2-11, 2-12, 3-1, ... but inside
the booklet there is a different way of counting ... 2-9, 2-10, A-1,
(empty page), 3-1, ..., 3-18, A-1 (again), A-2)
Also the picture of the board layout is not as good as the picture of
8-Bit card, because there isn't any letter like "SW1" written to the
picture.

Should somebody have such a board, please feel free to complete this
description or to send a mail to me!

This description has been written by Juergen Seifert <seifert@htwm.de>
using information from the Original

		    "ARCnet Installation Manual"

::

   ___________________________________________________________________
  <                    _________________  _________________           |
  >                   |       SW?       ||      SW?        |          |
  <                   |_________________||_________________|          |
  >                       ____________________                        |
  <                      |                    |                       |
  >                      |                    |                       |
  <                      |                    |                       |
  >                      |                    |                       |
  <                      |                    |                       |
  >                      |                    |                       |
  <                      |                    |                       |
  >                      |____________________|                       |
  <                                                               ____|
  >                       ____________________                   |    |
  <                      |                    |                  | J1 |
  >                      |                    <                  |    |
  <                      |____________________|  ? ? ? ? ? ?     |____|
  >                                             |o|o|o|o|o|o|         |
  <                                             |o|o|o|o|o|o|         |
  >                                                                   |
  <             __                                         ___________|
  >            |  |                                       |
  <____________|  |_______________________________________|


Setting one of the switches to Off means "1", On means "0".


Setting the Node ID
^^^^^^^^^^^^^^^^^^^

The eight switches in group SW2 are used to set the node ID.
Each node attached to the network must have an unique node ID which
must be different from 0.
Switch 8 serves as the least significant bit (LSB).

The node ID is the sum of the values of all switches set to "1"
These values are::

    Switch | Value
    -------|-------
      8    |   1
      7    |   2
      6    |   4
      5    |   8
      4    |  16
      3    |  32
      2    |  64
      1    | 128

Some Examples::

    Switch         | Hex     | Decimal
   1 2 3 4 5 6 7 8 | Node ID | Node ID
   ----------------|---------|---------
   0 0 0 0 0 0 0 0 |    not allowed
   0 0 0 0 0 0 0 1 |    1    |    1
   0 0 0 0 0 0 1 0 |    2    |    2
   0 0 0 0 0 0 1 1 |    3    |    3
       . . .       |         |
   0 1 0 1 0 1 0 1 |   55    |   85
       . . .       |         |
   1 0 1 0 1 0 1 0 |   AA    |  170
       . . .       |         |
   1 1 1 1 1 1 0 1 |   FD    |  253
   1 1 1 1 1 1 1 0 |   FE    |  254
   1 1 1 1 1 1 1 1 |   FF    |  255


Setting the I/O Base Address
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The first three switches in switch group SW1 are used to select one
of eight possible I/O Base addresses using the following table::

   Switch      | Hex I/O
    3   2   1  | Address
   ------------|--------
   ON  ON  ON  |  260
   ON  ON  OFF |  290
   ON  OFF ON  |  2E0  (Manufacturer's default)
   ON  OFF OFF |  2F0
   OFF ON  ON  |  300
   OFF ON  OFF |  350
   OFF OFF ON  |  380
   OFF OFF OFF |  3E0


Setting the Base Memory (RAM) buffer Address
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The memory buffer requires 2K of a 16K block of RAM. The base of this
16K block can be located in any of eight positions.
Switches 6-8 of switch group SW1 select the Base of the 16K block.
Within that 16K address space, the buffer may be assigned any one of four
positions, determined by the offset, switches 4 and 5 of group SW1::

   Switch     | Hex RAM | Hex ROM
   8 7 6  5 4 | Address | Address
   -----------|---------|-----------
   0 0 0  0 0 |  C0000  |  C2000
   0 0 0  0 1 |  C0800  |  C2000
   0 0 0  1 0 |  C1000  |  C2000
   0 0 0  1 1 |  C1800  |  C2000
	      |         |
   0 0 1  0 0 |  C4000  |  C6000
   0 0 1  0 1 |  C4800  |  C6000
   0 0 1  1 0 |  C5000  |  C6000
   0 0 1  1 1 |  C5800  |  C6000
	      |         |
   0 1 0  0 0 |  CC000  |  CE000
   0 1 0  0 1 |  CC800  |  CE000
   0 1 0  1 0 |  CD000  |  CE000
   0 1 0  1 1 |  CD800  |  CE000
	      |         |
   0 1 1  0 0 |  D0000  |  D2000  (Manufacturer's default)
   0 1 1  0 1 |  D0800  |  D2000
   0 1 1  1 0 |  D1000  |  D2000
   0 1 1  1 1 |  D1800  |  D2000
	      |         |
   1 0 0  0 0 |  D4000  |  D6000
   1 0 0  0 1 |  D4800  |  D6000
   1 0 0  1 0 |  D5000  |  D6000
   1 0 0  1 1 |  D5800  |  D6000
	      |         |
   1 0 1  0 0 |  D8000  |  DA000
   1 0 1  0 1 |  D8800  |  DA000
   1 0 1  1 0 |  D9000  |  DA000
   1 0 1  1 1 |  D9800  |  DA000
	      |         |
   1 1 0  0 0 |  DC000  |  DE000
   1 1 0  0 1 |  DC800  |  DE000
   1 1 0  1 0 |  DD000  |  DE000
   1 1 0  1 1 |  DD800  |  DE000
	      |         |
   1 1 1  0 0 |  E0000  |  E2000
   1 1 1  0 1 |  E0800  |  E2000
   1 1 1  1 0 |  E1000  |  E2000
   1 1 1  1 1 |  E1800  |  E2000


Setting Interrupt Request Lines (IRQ)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

??????????????????????????????????????


Setting the Timeouts
^^^^^^^^^^^^^^^^^^^^

??????????????????????????????????????


8-bit cards ("Made in Taiwan R.O.C.")
-------------------------------------

  - from Vojtech Pavlik <vojtech@suse.cz>

I have named this ARCnet card "NONAME", since I got only the card with
no manual at all and the only text identifying the manufacturer is
"MADE IN TAIWAN R.O.C" printed on the card.

::

	  ____________________________________________________________
	 |                 1 2 3 4 5 6 7 8                            |
	 | |o|o| JP1       o|o|o|o|o|o|o|o| ON                        |
	 |  +              o|o|o|o|o|o|o|o|                        ___|
	 |  _____________  o|o|o|o|o|o|o|o| OFF         _____     |   | ID7
	 | |             | SW1                         |     |    |   | ID6
	 | > RAM (2k)    |        ____________________ |  H  |    | S | ID5
	 | |_____________|       |                    ||  y  |    | W | ID4
	 |                       |                    ||  b  |    | 2 | ID3
	 |                       |                    ||  r  |    |   | ID2
	 |                       |                    ||  i  |    |   | ID1
	 |                       |       90C65        ||  d  |    |___| ID0
	 |      SW3              |                    ||     |        |
	 | |o|o|o|o|o|o|o|o| ON  |                    ||  I  |        |
	 | |o|o|o|o|o|o|o|o|     |                    ||  C  |        |
	 | |o|o|o|o|o|o|o|o| OFF |____________________||     |   _____|
	 |  1 2 3 4 5 6 7 8                            |     |  |     |___
	 |  ______________                             |     |  | BNC |___|
	 | |              |                            |_____|  |_____|
	 | > EPROM SOCKET |                                           |
	 | |______________|                                           |
	 |                                              ______________|
	 |                                             |
	 |_____________________________________________|

Legend::

  90C65       ARCNET Chip
  SW1 1-5:    Base Memory Address Select
      6-8:    Base I/O Address Select
  SW2 1-8:    Node ID Select (ID0-ID7)
  SW3 1-5:    IRQ Select
      6-7:    Extra Timeout
      8  :    ROM Enable
  JP1         Led connector
  BNC         Coax connector

Although the jumpers SW1 and SW3 are marked SW, not JP, they are jumpers, not
switches.

Setting the jumpers to ON means connecting the upper two pins, off the bottom
two - or - in case of IRQ setting, connecting none of them at all.

Setting the Node ID
^^^^^^^^^^^^^^^^^^^

The eight switches in SW2 are used to set the node ID. Each node attached
to the network must have an unique node ID which must not be 0.
Switch 1 (ID0) serves as the least significant bit (LSB).

Setting one of the switches to Off means "1", On means "0".

The node ID is the sum of the values of all switches set to "1"
These values are::

   Switch | Label | Value
   -------|-------|-------
     1    | ID0   |   1
     2    | ID1   |   2
     3    | ID2   |   4
     4    | ID3   |   8
     5    | ID4   |  16
     6    | ID5   |  32
     7    | ID6   |  64
     8    | ID7   | 128

Some Examples::

    Switch         | Hex     | Decimal
   8 7 6 5 4 3 2 1 | Node ID | Node ID
   ----------------|---------|---------
   0 0 0 0 0 0 0 0 |    not allowed
   0 0 0 0 0 0 0 1 |    1    |    1
   0 0 0 0 0 0 1 0 |    2    |    2
   0 0 0 0 0 0 1 1 |    3    |    3
       . . .       |         |
   0 1 0 1 0 1 0 1 |   55    |   85
       . . .       |         |
   1 0 1 0 1 0 1 0 |   AA    |  170
       . . .       |         |
   1 1 1 1 1 1 0 1 |   FD    |  253
   1 1 1 1 1 1 1 0 |   FE    |  254
   1 1 1 1 1 1 1 1 |   FF    |  255


Setting the I/O Base Address
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The last three switches in switch block SW1 are used to select one
of eight possible I/O Base addresses using the following table::


   Switch      | Hex I/O
    6   7   8  | Address
   ------------|--------
   ON  ON  ON  |  260
   OFF ON  ON  |  290
   ON  OFF ON  |  2E0  (Manufacturer's default)
   OFF OFF ON  |  2F0
   ON  ON  OFF |  300
   OFF ON  OFF |  350
   ON  OFF OFF |  380
   OFF OFF OFF |  3E0


Setting the Base Memory (RAM) buffer Address
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The memory buffer (RAM) requires 2K. The base of this buffer can be
located in any of eight positions. The address of the Boot Prom is
memory base + 0x2000.

Jumpers 3-5 of jumper block SW1 select the Memory Base address.

::

   Switch              | Hex RAM | Hex ROM
    1   2   3   4   5  | Address | Address *)
   --------------------|---------|-----------
   ON  ON  ON  ON  ON  |  C0000  |  C2000
   ON  ON  OFF ON  ON  |  C4000  |  C6000
   ON  ON  ON  OFF ON  |  CC000  |  CE000
   ON  ON  OFF OFF ON  |  D0000  |  D2000  (Manufacturer's default)
   ON  ON  ON  ON  OFF |  D4000  |  D6000
   ON  ON  OFF ON  OFF |  D8000  |  DA000
   ON  ON  ON  OFF OFF |  DC000  |  DE000
   ON  ON  OFF OFF OFF |  E0000  |  E2000

  *) To enable the Boot ROM set the jumper 8 of jumper block SW3 to position ON.

The jumpers 1 and 2 probably add 0x0800, 0x1000 and 0x1800 to RAM adders.

Setting the Interrupt Line
^^^^^^^^^^^^^^^^^^^^^^^^^^

Jumpers 1-5 of the jumper block SW3 control the IRQ level::

    Jumper              |  IRQ
    1   2   3   4   5   |
   ----------------------------
    ON  OFF OFF OFF OFF |  2
    OFF ON  OFF OFF OFF |  3
    OFF OFF ON  OFF OFF |  4
    OFF OFF OFF ON  OFF |  5
    OFF OFF OFF OFF ON  |  7


Setting the Timeout Parameters
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The jumpers 6-7 of the jumper block SW3 are used to determine the timeout
parameters. These two jumpers are normally left in the OFF position.



(Generic Model 9058)
--------------------
  - from Andrew J. Kroll <ag784@freenet.buffalo.edu>
  - Sorry this sat in my to-do box for so long, Andrew! (yikes - over a
    year!)

::

								      _____
								     |    <
								     | .---'
    ________________________________________________________________ | |
   |                           |     SW2     |                      |  |
   |   ___________             |_____________|                      |  |
   |  |           |              1 2 3 4 5 6                     ___|  |
   |  >  6116 RAM |         _________                         8 |   |  |
   |  |___________|        |20MHzXtal|                        7 |   |  |
   |                       |_________|       __________       6 | S |  |
   |    74LS373                             |          |-     5 | W |  |
   |   _________                            |      E   |-     4 |   |  |
   |   >_______|              ______________|..... P   |-     3 | 3 |  |
   |                         |              |    : O   |-     2 |   |  |
   |                         |              |    : X   |-     1 |___|  |
   |   ________________      |              |    : Y   |-           |  |
   |  |      SW1       |     |      SL90C65 |    :     |-           |  |
   |  |________________|     |              |    : B   |-           |  |
   |    1 2 3 4 5 6 7 8      |              |    : O   |-           |  |
   |                         |_________o____|..../ A   |-    _______|  |
   |    ____________________                |      R   |-   |       |------,
   |   |                    |               |      D   |-   |  BNC  |   #  |
   |   > 2764 PROM SOCKET   |               |__________|-   |_______|------'
   |   |____________________|              _________                |  |
   |                                       >________| <- 74LS245    |  |
   |                                                                |  |
   |___                                               ______________|  |
       |H H H H H H H H H H H H H H H H H H H H H H H|               | |
       |U_U_U_U_U_U_U_U_U_U_U_U_U_U_U_U_U_U_U_U_U_U_U|               | |
								      \|

Legend::

  SL90C65 	ARCNET Controller / Transceiver /Logic
  SW1	1-5:	IRQ Select
	  6:	ET1
	  7:	ET2
	  8:	ROM ENABLE
  SW2	1-3:    Memory Buffer/PROM Address
	3-6:	I/O Address Map
  SW3	1-8:	Node ID Select
  BNC		BNC RG62/U Connection
		*I* have had success using RG59B/U with *NO* terminators!
		What gives?!

SW1: Timeouts, Interrupt and ROM
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

To select a hardware interrupt level set one (only one!) of the dip switches
up (on) SW1...(switches 1-5)
IRQ3, IRQ4, IRQ5, IRQ7, IRQ2. The Manufacturer's default is IRQ2.

The switches on SW1 labeled EXT1 (switch 6) and EXT2 (switch 7)
are used to determine the timeout parameters. These two dip switches
are normally left off (down).

   To enable the 8K Boot PROM position SW1 switch 8 on (UP) labeled ROM.
   The default is jumper ROM not installed.


Setting the I/O Base Address
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The last three switches in switch group SW2 are used to select one
of eight possible I/O Base addresses using the following table::


   Switch | Hex I/O
   4 5 6  | Address
   -------|--------
   0 0 0  |  260
   0 0 1  |  290
   0 1 0  |  2E0  (Manufacturer's default)
   0 1 1  |  2F0
   1 0 0  |  300
   1 0 1  |  350
   1 1 0  |  380
   1 1 1  |  3E0


Setting the Base Memory Address (RAM & ROM)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The memory buffer requires 2K of a 16K block of RAM. The base of this
16K block can be located in any of eight positions.
Switches 1-3 of switch group SW2 select the Base of the 16K block.
(0 = DOWN, 1 = UP)
I could, however, only verify two settings...


::

   Switch| Hex RAM | Hex ROM
   1 2 3 | Address | Address
   ------|---------|-----------
   0 0 0 |  E0000  |  E2000
   0 0 1 |  D0000  |  D2000  (Manufacturer's default)
   0 1 0 |  ?????  |  ?????
   0 1 1 |  ?????  |  ?????
   1 0 0 |  ?????  |  ?????
   1 0 1 |  ?????  |  ?????
   1 1 0 |  ?????  |  ?????
   1 1 1 |  ?????  |  ?????


Setting the Node ID
^^^^^^^^^^^^^^^^^^^

The eight switches in group SW3 are used to set the node ID.
Each node attached to the network must have an unique node ID which
must be different from 0.
Switch 1 serves as the least significant bit (LSB).
switches in the DOWN position are OFF (0) and in the UP position are ON (1)

The node ID is the sum of the values of all switches set to "1"
These values are::

    Switch | Value
    -------|-------
      1    |   1
      2    |   2
      3    |   4
      4    |   8
      5    |  16
      6    |  32
      7    |  64
      8    | 128

Some Examples::

      Switch#     |   Hex   | Decimal
  8 7 6 5 4 3 2 1 | Node ID | Node ID
  ----------------|---------|---------
  0 0 0 0 0 0 0 0 |    not allowed  <-.
  0 0 0 0 0 0 0 1 |    1    |    1    |
  0 0 0 0 0 0 1 0 |    2    |    2    |
  0 0 0 0 0 0 1 1 |    3    |    3    |
      . . .       |         |         |
  0 1 0 1 0 1 0 1 |   55    |   85    |
      . . .       |         |         + Don't use 0 or 255!
  1 0 1 0 1 0 1 0 |   AA    |  170    |
      . . .       |         |         |
  1 1 1 1 1 1 0 1 |   FD    |  253    |
  1 1 1 1 1 1 1 0 |   FE    |  254    |
  1 1 1 1 1 1 1 1 |   FF    |  255  <-'


Tiara
=====

(model unknown)
---------------

  - from Christoph Lameter <christoph@lameter.com>


Here is information about my card as far as I could figure it out::


  ----------------------------------------------- tiara
  Tiara LanCard of Tiara Computer Systems.

  +----------------------------------------------+
  !           ! Transmitter Unit !               !
  !           +------------------+             -------
  !          MEM                              Coax Connector
  !  ROM    7654321 <- I/O                     -------
  !  :  :   +--------+                           !
  !  :  :   ! 90C66LJ!                         +++
  !  :  :   !        !                         !D  Switch to set
  !  :  :   !        !                         !I  the Nodenumber
  !  :  :   +--------+                         !P
  !                                            !++
  !         234567 <- IRQ                      !
  +------------!!!!!!!!!!!!!!!!!!!!!!!!--------+
	       !!!!!!!!!!!!!!!!!!!!!!!!

- 0 = Jumper Installed
- 1 = Open

Top Jumper line Bit 7 = ROM Enable 654=Memory location 321=I/O

Settings for Memory Location (Top Jumper Line)

===     ================
456     Address selected
===     ================
000	C0000
001     C4000
010     CC000
011     D0000
100     D4000
101     D8000
110     DC000
111     E0000
===     ================

Settings for I/O Address (Top Jumper Line)

===     ====
123     Port
===     ====
000	260
001	290
010	2E0
011	2F0
100	300
101	350
110	380
111	3E0
===     ====

Settings for IRQ Selection (Lower Jumper Line)

====== =====
234567
====== =====
011111 IRQ 2
101111 IRQ 3
110111 IRQ 4
111011 IRQ 5
111110 IRQ 7
====== =====

Other Cards
===========

I have no information on other models of ARCnet cards at the moment.  Please
send any and all info to:

	apenwarr@worldvisions.ca

Thanks.