This is a simple Electron expansion that provides three cartridge slots, with the same pinout as the cartridge slots on the Plus 1 (except for the nROMSTB line, which is unimplemented) using a CPLD for address translation.
I made this after my Plus 1 broke, and it works very well in initial testing.
Tested with:
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Acornsoft Hopper cartridge
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Dave Hitchins (Retro Hardware) Mega Games Cartridge
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My Elk PiTubeDirect cartridge
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My 32kb_flash_cartridge (original and standard)
Discussion on the Stardot forums.
