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Modes 1-6 & 8.
_______
Mode 4.
Function: RS232 input to Centronics output interface.
Use:
PSI connects parallel printers to the RS232 port
of a computer.
Example: Parallel plotter or laser printer running from
COM1 port of a PC.
Enables parallel printer to be 50 feet or more
remote from the host computer.
_________
Summary.
The PSI BOX acts as a one way data converter reading
RS232 information from a computer's serial port and passing it
straight through to a parallel printer or plotter. This is often used
as a method of placing parallel printers etc in a remote location
with the data being sent down a twisted pair RS232 line at high
speed.
Data is received according to the RS232 input handshake
and output according to the Centronic output handshake. In this
mode no other sort of data transmission is possible. The IEEE
port is disabled and does not respond to any commands or data.
If the RS232 input buffer of the PSI BOX becomes full
then it will signal unable to receive more RS232 data until the
Centronics device accepts data from the PSI BOX.
In Mode 4 the whole of the PSI BOX ram acts as the
RS232 input buffer.
Chapter 6
PSI BOX Reference
Page 59
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