Following on from my last post on the EMULATOR 1, I spent some time trying to get communication on port #1 of one of the new SIOs I recently...

As a follow-up to my last post, after publishing it, I asked myself the question of whether I had actually tested my five new SIO/2s from Ch...

At the moment, I'm still stuck on what I think is the main problem, which is a supposed malfunction of the SIO/2 which manages data writ...

For some time now, and following all the tests that I have been able to carry out on the EMU 1 motherboard, I have come to the conclusion th...

A month after my last publication on the subject, a little progress... And yes, I spent a lot of time on the EMU1 motherboard which, if it s...

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...