Commander X16

The VERA board (with the SD card slot and the video port) is responsible for the video, the PSG audio, and the SD card interface, so if it isn't working correctly (or maybe not seated properly?), none of that will work. You said your DAC socket (for the YM3012?) was bad, so that eliminates audio fro...

Sorry if this was answered already, but there's been confirmation that the GS will have all 2MB of banked RAM available, right? I remember the original plan was that Gen 1 would be expandable up to 2MB but Gen 2 was going to be 512KB only.

That back view makes me think of Legos for some reason. :P It's pretty neat, but for my tastes personally, I really liked how the Apple IIgs looked, and I'd have loved to put my X16 into something similar, though I might be the only person. Maybe one of these days I'll formally figure out and sketch...

Think about who the GS is for, and it makes sense why they'd remove the IEC port on it. It'll still be on the non-GS though, so just get that one if it has what you want.

I really like how this looks, and also I like how your solution was just to have the keyboard slot into it (though it might be a wee too tall for me), because I don't know any other wedge designs that tried that. (I'm sure there were some, I'm just not aware of them) Is there enough structure to sit...

LED and motors staying permanently on makes me think the CPU isn't running, but I'm not an expert at repairing these.

I have an old 1571 drive thats missing the top cover. Not sure if it works, but if it does, I could possibly remove the drive and controller board and maybe mount it in the case along with the MB since they both have exposed 5.25" bays Now I'm curious, is it possible to mount a 1541 or a 1571 ...

This issue from a year ago is related to the documentation not mentioning the cursor is sprite 0.

I am a little bit confused how you can know if L borrowed from H. The timer is constantly running for each instruction, so while you capture the high byte, the low byte is already "lost" (you lost the count by the amount of cycles it took to read from the high byte). When I think about it...

It doesn't look like the VIA allows you to read the full 16-bit counter at once, so you'll always be at risk of a decrement occurring between reads. The only danger would be if L borrows from H while you're reading, but I think this can be mitigated: ; Read H and L as quickly as possible. lda V_T1_H...