Added some new photos of the populated PCB for the Commodore Amiga A501 memory replacement card.
Find them on the main project page here.
Latest articles
Sweet success, card works 100% in different DUT(Amiga)
So I think the Amiga 500 I was testing with has problems. I’m not sure precisely what or why but Today, I dropped my new A501 replacement card into a known-working Commodore Amiga 500. It fired up immediately no...
Stress testing the memory board
So I’ve written some assembly in the monitor software I’ve been using, and I’ve just created a large loop to see if I can get the card to fail. I’m still having plenty of problems on bootup, but...
RTC Progress
RTC appears to be working and keeping the date and time across cold-starts. I picked the Epson RTC-72423 which is about a $6 chip, but is obviously directly compatible with the OKI Semiconductor MSM6242B. The design...
Populated PCB with fix for unneeded inverter
Lots of progress but little time to talk about it. Here’s the fully populated card installed. There were two issues identified so far with the PCB design. One, the battery holder silkscreen was upside...
PCB ordered from Seeed Studio
I placed the order late last night for the PCB! The PCB design is obviously finished, fully passes the kicad DRC checks, the problems with the footprints were solved. I’ve decided to go with Seeed Studio’s...
