Im late to the party. Really really late. What are the chances of a kit?
Also my deco is fully untested. So i will need some help to sort it out at some point. This is a deco cassette replacement i suspect?
In case anyone gets a 2732 BIOS EPROM and has a -3 (PHAT) machine and doesn't want (or can't) split it onto two 2716s:
A 74(LS/HC/??)08. (I tried a Diode-AND, didn't work, but I also had PSU issues as well as some intermittent contact on the dongle and didn't know, so maybe now it works) (the God of Unused Gates wouldn't grant me a wish there sadly - on Scramble bootlegs basically anything goes because it feels like every chip has unused gates on those)
The /OE (Pin 1 of the left (Designation 0) ROM goes to A11. The /OEs from both (0 and 1) original EPROMs get ANDed and the result goes to the 2732s /OE.
Works on my machine. It's a PHAT that's so early, it actually has BLACK dip switches.
Date codes on most ICs are mid 80 (10th-30th week) and there isn't a lot of fluctuation even across different brands. At least those that have legible (for me) datecodes.
Not many Fujitsus though. Still says -3 on all the boards. Lots of bodge wires.
Ah and "Pin 1 of the left" that means Pin eighteen, stupid auto-emojis.