Since my last post about trying to repair the EMU1, I've done a whole bunch of new tests. I also replaced a few integrated circuits. The...

Same title as the previous post? Indeed, the chain of discoveries continues... In fact, after discovering a faulty memory component and repl...

Since my last post, I have finalized the EMU1 motherboard DRAM test program. The problem that arose when testing a 64KB bank and then the ot...

I think I finally found the problem of adapting the EPROM emulator. It must be said that it is not particularly easy to adapt an emulator th...

As I indicated in my previous post, I now need to know if the DRAM on the EMU1 motherboard is fully functional or not. As a reminder, when I...

I'm currently waiting for some printed circuit boards, and since I'm on the Drumulator topic, I decided to try to troubleshoot anoth...