Quote:
Originally Posted by DeltaAlpha52
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. |
You could just monitor the inputs to the 7445 and the outputs from the LED drivers, and just read the outputs of the drivers whenever the LSBit of the 7445 inputs.