For the SIMM version, are you going to do 2x1MB parity 30 pin SIMMs and waste 1/4 of the RAM, or use 6x256k parity SIMMs?
Edit: Thinking this over, to work with the three RAS signals without additional logic, you'd need to do the 6x256k SIMM design. Of course, turning those signals into the additional addressing wouldn't be too difficult.
My eyes are going a bit square, but I've tidied up a bunch of footprints and arranged labels and drawings based on the photos. Looks pretty good!
Stock you can get to just over 4 meg with this 1536k card and a 2048k card in a 16 bit ISA slot. That's probably enough for a 286.Yeah, 6x256k w/parity 30-pin simms. However, on the motherboard, there is a signal attached to pin B3, which looks like it should be a tenth address line.
So it's possible that all the logic is already in place to address as much as 6 megabytes, which would be wild.
Yeah, as far as faithful reproductions go, I think I'm ready to let that particular part slide. I definitely could not find one for an acceptable price, so probably just a similar 52p .100 header will have to suffice.That AMP connector also needs some mounting holes. I added some to the file in the repo, but I just realized those aren't just big holes, there's like a rivet that gets soldered in place?. I'll update it again. Speaking of which, this connector might be the hardest part to get a hold of in order to make a faithful reproduction.