Is the backplane used unaltered from the RC2014? How did you find adapting the Z80 bus to the 6502 signals? Is the backplane mostly just straight-through so it's for connecting SIL40s in parallel or do some lines have some extra circuitry?

I'm using it without any alterations - the one I'm using ...

Excellent! It can sometimes take some determination to check things which you don't think are wrong - that's one place where two heads can be better than one.

Nice-looking system too. Seems to be a lot going on there - five boards?

Yep, it's a lot for a system that does almost nothing at all. I ...

Eureka! I found the error, after spending a lot of hours of checking every tiny bit of code, checking everything out using the DSO and programmed a new Arduino sketch in order to sniff out what was going out over the buses. Given that sync toggled as described, clock ticking and R/W alternating here ...

Hmm... I assumed the EEPROM was working as it should since the \ showed up, I believe that was the expected first character the Woz monitor should output. Did swap out the current EEPROM with a fresh one, CAT28C256 this time in order to check if that made any difference - doesn't appear do so, but I ...

Hoping anyone can point me in right direction since I'm stuck, completely stuck and I'm not sure what else to try at this point. Have been hard at work drawing out designs based on the Apple 1 Replica Creation book, so hopefully the errors made are of the patchable kind. I'm using an Arduino Nano to ...