This was Macrotech's version of a RAM disk. This was a 5 layer PC
board with a further 4 layer adaptor board attached on top.
The board had 512K of static RAM. The board use (8K X 8) HM6264L-120 RAM
chips. Unfortunately the chips are not socketed. It could be
configured a a "normal RAM board" or as a memory disk. It was IEEE-696
compatible. It worked with 8 bit or 16 bit data paths.
As a memory board it could be set on any 64K boundary in the 16MG address
space of the S-100 bus. As a memory disk it worked unmodified with the
software for the then popular CompuPro
M-Drive board. There was a
battery backup circuit (and battery) also on board that required minimal
power. The battery would recharge when the power was restored. A
full battery would last ~150 days!
There was a good review of this board in the S-100 Journal (Vol 1, #3, 1986)
see
here.
I do not have a copy of the manual for this board. If you can share one
please let me know.
