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I was lucky enough to recently acquire a new-in-box Basis 108, a German-made Apple II clone with a Z80 coprocessor for CP/M. It's a big, heavy beast with a metal case and high-quality keyboard. The original owner was a Kaypro dealer who bought it for evaluation purposes and never used it. My original intent was to get it working and use it, but once I saw it, I realized that it needs to be preserved as is. 

I was lucky enough to recently acquire a new-in-box Basis 108, a German-made Apple II clone with a Z80 coprocessor for CP/M. It's a big, heavy beast with a metal case and high-quality keyboard. The original owner was a Kaypro dealer who bought it for evaluation purposes and never used it. My original intent was to get it working and use it, but once I saw it, I realized that it needs to be preserved as is. 

I replaced the HAL with a GAL I programmed and it made absolutely no difference.  That lead me to suspect he MMU (344-0010-B) of being fauklty and I was able to get hold of a replacement MMU temporarily.  I swapped the MMU over and it sprang to life!  The only remaining fault is thet the keyboard input is garbled, however as I have not replaced he Keyboard ROM and the original gets pretty hot, I think I can guess what the problem is.  My attention now is on how to replave the MMU.