IMSAI front panel and Cromemco FDC

From: Bill Sudbrink <bills_at_adrenaline.com>
Date: Thu Nov 16 09:59:04 2000

I haven't played with mine in a while, but was reminded
of this by a comment in a current ebay auction. Whenever
I put a Cromemco 16FDC or 64FDC in an IMSAI box, the front
panel stops working (the 4FDC doesn't do this). Looking
at the schematics for the Cromemco boards, I can't see any
reason for this, but watching the behavior of the FP lights,
it looks like the board is driving the data bus whenever a
wait is asserted. Can somebody else with the 16FDC or 64FDC
schematics take a look?

Thanks,
Bill Sudbrink
Received on Thu Nov 16 2000 - 09:59:04 GMT