![S100 Computers](../../../Header/S100_Banner.jpg)
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](4PIO.jpg)
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](4PIO block diagram.jpg)
In
summary,
the
4PI0
had the following features:-
Complete
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.
One
output port
dedicated
to
software
enabling/disabling the
other
three
output
ports.
Optically
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
4PIO
8PIO TU-ART
D+7A I/O
Dazzler PRI
GPIB Board
XMU
XXU
Other Boards
This page was last modified
on
01/08/2011