Macrotech -- 256k Dynamic RAM
This was a very nicely laid out 256K Dynamic RAM board S-100 board. It came out in mid-1982.
The board had 24-bit addressing capability.
It could however they claim operate in any S-100 System (EEE1696 or non
IEEE). DMA operations were fully supported as were 8 or 16 bit data transfer
protocols. Te board would operate up to 6 MHz with no wait states and up to
10 MHz with automatic wait state-assertion.
There was on-board Parity error detection and double parity in the 16-bit
mode of operation.
All memory refresh cycle timing was
generated on board providing easy-CPU independent characterization.
Again it was a 6 layered PC board.
The manual for this board can be obtained
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