rnndb: add base context states for vg

Add xml file with basic context registers; no register
meanings figured out yet.

1 files changed, 18 insertions, 2 deletions

diff --git a/doc/2d.md b/doc/2d.md
index ec26693..960720f 100644
--- a/doc/2d.md
+++ b/doc/2d.md
@@ -4,8 +4,24 @@
 Make sure to set the PIPE to 2D before using the 2D engine.
 
 As the complete state footprint is pretty small, it is recommended to program all relevant
-2D engine state for an operation at once before a command instead of relying on a context as with 
-3D rendering.
+2D engine state for an operation (before flusing) at once before a command instead 
+of relying on a context being maintained as with 3D rendering.
+
+2D commands
+-----------------
+
+- Clear
+- Line
+- Bit blit
+- Stretch blit
+- Multi source blit
+
+Video rasterizer
+-----------------
+
+- Horizontal filter blit
+- Vertical filter blit
+- One-pass filter blit
 
 Monochrome blits
 -----------------