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From: irwin@uiucdcs.cs.uiuc.edu
Newsgroups: net.micro.pc
Subject: X-On/X-Off flow control???
Message-ID: <24700145@uiucdcs>
Date: Thu, 30-Oct-86 11:59:00 EST
Article-I.D.: uiucdcs.24700145
Posted: Thu Oct 30 11:59:00 1986
Date-Received: Sat, 1-Nov-86 02:53:09 EST
Lines: 19
Nf-ID: #N:uiucdcs:24700145:000:834
Nf-From: uiucdcs.cs.uiuc.edu!irwin    Oct 30 10:59:00 1986


I do not usually follow this forum, so if the question that I am
about to ask has been covered before, please excuse my bringing
up the subject again.

I have a friend that has a new PC running PC-DOS. He has connected
a serial interface printer to it that he has been running on another
system. On the previous system, the printer worked fine. The manual
for the printer states clearly that the printer uses X-On/X-Off for
flow control.

When he connects the printer to the PC, it over-runs the printer
buffer (he is running it at 9600 baud). It is clear that PC-DOS
must be using RTS/CTS instead of X-On/X-Off for flow control.
No where in the documentation, can he find any reference on how
to implement the X-On/X-Off protocol in PC-DOS, or in fact, what
is actually being used for flow control.

Does anyone out there know how??