Recent content by arnold.exe

Not to resurrect very old threads needlessly, but I had these boards made from the gerbers on Github (before noticing there was an OSHPark shared project already, oops) and neither the +12V or +5V grounds were actually connected to ATX ground. I was surprised, enough that I pulled in the Eagle...

I think I'm going to temper my ambitions and just go for NOS 8002s off ebay...got one and it worked right off the bat. But I doubt any of these will last forever.

I'll say this is probably beyond my abilities to come up with, but it's a fascinating read. Thanks for mentioning it. http://elm-chan.org/works/crtc/report.html

I'm working on repairing a couple of BigBoard II systems, and they both have busted CRT8002 chips, broken in wildly different ways. I checked all the signals, they look pretty good, they're just displaying the wrong characters or glyphs that aren't even in any of the character sets. And they're...

I got a hold of a Micro-Link build inside a Heath H19, and the main board is a STD147, a Z80 CPU card, but unfortunately I don't have a manual or any way to decipher device addresses since I'm not great with disassembly. I also have a STD207 I bought off ebay, which as a 68k chip for its main...