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Digital Research Computers -- 32K EPROM Board
This was a useful ROM board in that it could take RAM or ROM together on the same board.


The board could be used in any one of 4 ways:
As a 32K 2716 EPROM board
As a 32K 2732 EPROM board
As a mixed 32K 2716 EPROM board and an 2K X 8 RAM board
As a 32K static RAM board

The board met all the IEEE-696 specifications and so had 24 bit addressing.  It could be addressed in any two 16K blocks on any 64K boundary. It supported the Cromemco or Northstar bank select feature. It had on-board wait state circuitry for fact CPU's. It did support the S-100 bus Phantom line for input but unfortunately not output (to inactivate othere overlapping RAM on the bus).  It was very useful for MP/M systems.

The manual for this board can be obtained here.


Digital Research Computers S-100 Boards
16K RAM     8K RAM    16K ROM    32K EPROM    Sound Effects Board    Z80 CPU Board   128K RAM/EPROM   LS-100 RAM Disk
64K Static RAM


This page was last modified on 12/01/2013