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While nowhere near as common ExpandoRAM SD Systems also made very practical ROM S-100 board.  The board as you might expect was called the ExpandoROM.

SD Systems ExpandoROM

The SD SALES EXPANDOROM was a high performance PROM board using the industry standard 2708 (1Kx8) EPROM or 2716 (2KX8) EPROMS.   Other notable features of the board included:-
        1) Switch addressing on 16K or 32K boundaries
        2) Each EPROM is  DIP switch selectable on/off.
        3) DIP switch selectable wait states (0, 1 or 2).


The manual can be seen by clicking on the pdf file below.
SD Systems ExpandoROM Manual

Other SD Systems  S-100 Boards
8024 VDB    ExpandoRAM    ExpandoROM     SBC    VersaFloppy I & II   Z8800   PROM-100  
I/O8 Serial Board  4KRAM   Other Boards


This page was last modified on 10/25/2013