I think using EEPROM is a great idea, but I'd be remiss if I didn't mention that I've got CMOS EPROMs in the store for exactly this reason: http://store.go4retro.com/categories/Electronic-Components/Memory/
They are getting harder to find at reasonable prices, and windowed ones are nearly impossible to find at sane prices.
Jim
They are getting harder to find at reasonable prices, and windowed ones are nearly impossible to find at sane prices.
Jim