I tend to lurk rather than post but had a couple of ideas for ADAM upgrades for sharing:
-I got as far as a v1 schematic and layout for a Micro Innovations compatible Dual Serial card
-Internal AY Sound chip upgrade consideration
The dual serial card was intended to have a Pi Zero hangaring off it; primarily to run PiGFX for a HDMI/Composite 80column output for CP/M on the ADAM, along with a secondary serial port for communications. Of course with a Pi inside the machine the options are endless. (see Apple2Pi as an example) The compatibility with a known card because I'm no programmer and wouldn't be up to writing drivers. TTL level only to save on cost, and laziness.
Like the idiot I am I accidentally deleted my Eagle schematic for the board. !!! :-(
I still have the .brd file so could still make gerbers for fabrication with what I have, and I did at least take a screen-shot of my schematic...
...anyway I'm feeling pretty ticked-off at the mo' and it might encourage me to continue if there was any interest or indeed suggestions.
-See attached screen-shots of the board layout and schematic
-Also attached is a .JED file for the GAL - If anyone has the original from the Micro Innovations board that would be great.
As already mentioned I'm no coder and my attempt at reverse-engineering the original may be no good.
-This version is intended for Slot P7, as per the original, but as I've now got a MicroFox IDE card (excellent) in that slot I was going to rework it for P6 or P5 - thoughts? It wasn't my intention to use the external expansion connector for obvious reasons...
...related to that I'm tempted to make a AY-based sound card for the ADAM to allow otherwise ADAM-compatible SGM software to have sound.
If I get round to that I will, of course, share. The plan for now would likely be an internal upgrade, likely plugged in to the Z80 socket. Partly because I don't like having stuff hanging out of my machines, and partly because DIL-40 sockets are easy to source while leaving all the native slots free.