RAM ROM card for the MTU backplane

Update: New corrected and enhanced version

For it to be minimally usable, I need memory for my KIM-1. So, I’ve designed what I believe to be the most flexible KIM-1 memory expansion available:

• Switchable 0000-03FF systen RAM replacement
• Switchable 0400-13FF RAM
• Switchable system ROM replacement (needs a small modification to the MTU boards to disable the DECEN line if not used with my MTU buffered motherboard)
• 4 selectable ROM sets
• Enough room to place a ZIF socket for the ROM
• Switchable 4K RAM/ROM areas from 2000 to FFFF
• Configurable interrupt vectors to the top of any of the 4K chunks.
• Max. 1 TTL load on the bus, so it will work nicely on unbuffered backplanes

Everything available at this GitHub repository