The Coco "Flash2" cartridge is my version of an in-system-programmable flash-based cartridge for the TRS-80 Coco.

You can read a bit more about it here...
[Link]

Tonight I finally got to build a board as we have been waiting on Altera CPLDs for months now.

1st problem I found with the board was the pinout on the 'reset' pushbutton was wrong - so I left it off at this point.

Assembled...