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Intersystems ADDA Card.

This was Ithaca Audio's (later known a Intersystem's) Analog to Digital and Digital To Analog Board.


The board has 8 A/D channels and 8 D/A channels all independent with a range of +5 to -5 Volts. A/D sampling up to 20 KHz is possible. The D/A conversion time is typically 2 microseconds.

There is a RTC derived from the bus 2MHz clock.
Ports can be either memory or I/O mapped and can be interrupt triggered.
The board had a wait state generator and can utilize the S-100 bus Phantom line (for Memory mapped ports).

The manual for this board can be obtained here.


Other InterSystems 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