Just completed some initial testing of the Video board.  Wrote some code to write and read blocks of VRAM - so far no issues detected.  The code writes to a VRAM location, then reads it back and verifies - there are no NOPS or delays in the reading and writing.

I would like to do a bit more testing on this.  Need to get the chip into one of the higher res modes - to make sure the RAM is being fully tested.

I did not see the WAIT line get activated in the testing, which confused me a bit - I was expecting this line to go low under lots of memory writes - not sure what i am not understanding here.

Also wondering if the writes are impacting other locations?  Need to do lots more testing before i gain confidence that the timing for memory will work.