64K Dynamic RAM Card.
This was a later Intersystem's EPROM
Board. It is possibly one of the best S-100 EPROM boards made. It was
extremely powerful with all the requirements of the IEEE-696 standard
implemented. The only other comparable EPROM board would be the DRC
128K ROM/RAM Board.
The Ithaca Intersystem's EPROM Memory board was a versatile
microcomputer memory module designed for 8-bit or 16-bit S-100 bus systems. It
provided up to 64 Kbytes, or as little as 1 Kbyte, of non-volatile EPROM storage
in any S-10O system. There were two assembled versions of the EPROM Memory
The EP64 accommodated any of the following EPROMs: 2508,
2758, 2516, 2716, 2532, and 2732.
The EP16 accepted the old 2708 EPROMs and with hardware
modification by the user, T.I. 2716 EPROMs.
Modification of the EP 16 board is described in section 3.0
of the manual.
Board Features include the following:-
16 EPROM capacity; arranged as two banks of eight EPROMs.
Each bank of the EP64 is independently configurable to accept
2716, 2532, 2732, or 2758 EPROMs or compatible ROMs.
Each bank was independently addressable to any bank-sized
boundary in the 16 Byte memory address space.
The phantom facility allowed the board to overlap
EPROMs may be accessed in pairs for 16-bit data transfer.
EPROMs may be disabled in
From 0 to 4 wait states are jumper selectable,
allowing operation in 6 MHz systems.
The EP64 board may be configured for either fast access
time or low power consumption.
The manual for this board (with schematic) can be obtained
Other Intersystem's S-100 Boards
64K Dynamic RAM
256K Dynamic RAM
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