S100 Computers

Home S-100 Boards History New Boards Software Boards For Sale
Forum Other Web Sites News Index    
Cromemco 4PIO  Board   
This is quite a useful board if you wish to have your computer control power line switches or medical devices.

Cromemco 4PIO

The Cromemco 4PI0 was an S-100 bus compatible, four isolated I/O port printed circuit board.  The board was designed to operate reliably in high noise industrial control environments where computer system to terminal device electrical isolation was necessary. See the following block diagram.

4PIO Block Diagram

  summary, the 4PI0  had the following features:-

  computer system  to terminal device electrical isolation.
Three optically   isolated, 8-bit parallel input  ports.
One input port dedicated to 4PI0  software  status  polling.
Two optically isolated, 8-bit  parallel output  ports.
One magnetic relay isolated, 8-bit parallel output port.
output port dedicated to software enabling/disabling the  other  three  output  ports.
isolated handshake  lines on all  three input ports;   optically isolated output strobes on the two opto-output ports.
A 5 Kbytes/second
  opto-isolated   parallel  data  transfer rate.
Slide  switch  assigned  I/O  port  address  assignments.
Optically  isolated  system RSSET/NMI   (jumper selectable).


The manual for the board can be obtained here

Other Cromemco S-100 Boards
ZPU  SBC   4KRAM  16K RAM  64KZ RAM  64KZ-II RAM  256KRAM  8KBytesaver  Bytesaver-II  
16KPROM  32K Bytesaver  4FDC   16FDC  64FDC  WDI  WDI-II   STDC   DPU
4PIO   8PIO   TU-ART  D+7A I/O   Dazzler  PRI   GPIB Board   XMU  XXU  Other Boards


This page was last modified on 10/25/2013