The PC-8001mkIISR that I blew up my budget for is working! Kind of. Pushing the reset button makes it act super weird. I'll figure it out. #retrocomputing #pc8001

Forgot to mention that I finally (after way too much money) have a PC-8001mkIISR.

I'm not sure why NEC even made this, as the writing was already on the wall for the 8001 series by this point, but it has a unique screen mode that even the far more advanced 8801 machines can't do.

It needs a lot of work, but I'm looking forward to getting into it. #pc8001 #retrocomputing #pc80mk2

New blog post! It's all about the NEC PC-8001, their 1979 #Z80-based miracle of home computing. I got it working, but that was too easy, so I decided to make a whole new floppy drive adapter for it based on some blurry Japanese photos. Did that turn out okay? Eventually... except the _drives_ were broken, too. Come on in and see the rabbit hole I got myself into this time: https://www.leadedsolder.com/2024/07/02/pc8001-pickup-disk-drive-interface.html

#retrocomputing #nec #pc8001 #retrocomputer #kicad

No shortage of discrete logic in this NEC PC-8031 disk drive. The rusty full-height 5.25" floppies are going to be "fun" to get working again. #retrocomputing #pc8001

Couldn't figure out why the PC-80s31 attached to the homemade floppy disk interface for my PC-8001 was acting up, so I grabbed its older cousin: a PC-8031. Now to start making an adapter. #retrocomputing #pc8001

Last night I got sort of annoyed that I can't test my PC-80s31 floppy drive without a copy of NEC Extended BASIC. I'm annoyed because I need to load that BASIC off a cartridge, and I didn't have one! One was made.

If I hooked up the page switching logic right, we should be able to put four copies of Extended BASIC on here. That's very extended indeed.

#pc6001 #retrocomputing #kicad #pc8001

Well... it probably wasn't the drive's fault after all. Bodged this fix and things are working better but not completely. I suspect the 45-year-old edge connector on the computer stuffed full of dust and mud might be tarnished.

#retrocomputing #pc8001 #kicad

Still trying to figure out why my PC-8001 disk drive interface doesn't work. I've reached the point of blaming the drive itself, but it is rude enough to start working when I test it in isolation. It's gotta be my homemade interface. #retrocomputing #pc8001 #pc80s31

ＰＣ－８００１でＤＭＡＣとＣＲＴＣのレジスタを書き替え、８０桁×５０行を表示して遊んだ方、いらっしゃいましたらフォローさせて下さい。 #PC8001

Couldn't find the composite cable I made five (six?) years ago, so I whacked together another one. My cable-making skills have only moderately improved and I think it's all due to better tools.

Just look at that sharp monochrome output! You'd never have thought this was a dumpster monitor with the world's noisiest cable and an e-wasted PC-8001. More with this system soon when the re-spin of the floppy drive adapter arrives. #retrocomputing #retrocomputer #pc8001 #crt