But isn't 0xD00 just the display "latches" - reading that address gives the keyboard values - and I'm sure I read some where about reading 0xD00 impacts the values displayed
Mind you I could attach to the address / data lines and extract the values when the D00 address is written to. I'm sure the arduino can run fast enough to do that and the issue vi board has all the address/data lines on the edge connector.