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Intersystem's PROM Card.

This was Ithaca Audio's (later known a Intersystems) EPROM card.

Intersystems -EPROM Card

The card was designed to take sixteen 2708 or 2716 EPROMS, a first at the time (1977). Each ROM  chip on the board could be individually addressed and up to 4 wait states could be added to the bus.  Unused sockets did not block out the memory address space. Fully loaded the board drew about 320mA.  There were voltage regulators for -5V and +12V for Intel 2716 EPEOMS. If 2708 EPROMS are used then only a single regulator (bottom left) is required.

The manual for this board can be obtained here.


Other Intersystem's S-100 Boards
64K Dynamic RAM    8K RAM   EPROM   IA-Display   FDC   IO-Card    Z80-Series-II    Z80
  ADDA Board   EPROM Burner
FPB   256K Dynamic RAM   16-64K EPROM
  HDA   Z80-Series_III   6-SIO  EPROM Emulator   RTC Board



This page was last modified on 10/25/2013