To be fair, youtube tries its hardest to make people NOT read the info on a video (text hidden, unhide button very discreet, emphasize on what other video you should zap to). Most of the time, I unhide the details only to get a link (to a product, github repository or a reference, generally mention...

Indeed similar topics (maybe in passing even) have mentioned that Facebook is a terrible place to store information. I think people flood to FB as it's convenient for them. But information soon gets lost. Doesn't exactly have a search feature. Don't think it gets archived on archive.org etc. When I ...

I can only assume that when you adapted my core to your hardware, the core modifications you implemented messed with the timing and cycle accuracy got broken. From the timing difference sounds like an extra cycle was introduced at the DMA handshake. Send me the Quartus project folder with my modifi...

Also did you countinuety check all ROM pins back to the CPU ? Do with ROM chips in place..

OK.. So put back shifter and MMU. Holding down reset should make all address pins high... Then when you let reset out, all CPU pins should be low on the first cycle when reset goes high..

Exactly, the address pins have gone high since I removed the MMU, SHADOW, C103663-001 RTC #1679 and the SHIFTER. I don't know which one actually caused this, because I did it by removing all of them together. It must be said that if I put all the chips back in their sockets (all I mean ROMs and all...

So all address pins are now high now all chips removed and wasn't before ?

Likely kyroflux is your only option then I assume

nothing is happening. for all addresses, by pressing (and holding down) the reset button, they remain like this. They should all be high. I can only assume at this point the CPU is duff. You could remove all chips in sockets just to make sure nothing else is shorting the bus. Do the LS224 LS373 Chi...

Does it use a standard DOS type format for starters ?