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From: ews00461@uxa.cso.uiuc.edu
Newsgroups: comp.sys.mac.programmer
Subject: Serial print ?
Message-ID: <227700053@uxa.cso.uiuc.edu>
Date: 3 Feb 90 10:36:17 GMT
Lines: 22
Nf-ID: #N:uxa.cso.uiuc.edu:227700053:000:843
Nf-From: uxa.cso.uiuc.edu!ews00461    Jan 30 12:44:00 1990



I simply want to dump a text file to the serial port at
9600 baud or so.  My reading of IM II makes this look
rather simple, but I *think* I'm having overflow errors
on some buffer.  After opening the driver and the
text file, I read a buffer full from the text file.
The number of characters I read here is one parameter
I have tried to vary (any suggestions?).  Then I
FSWrite this buffer to the serial port and go back
through the loop immediately.  Is there some way to
check to see if the port is actually ready for another
block of data ?  My problem manifests itself through a
nasty beep from the printer (a DecWriter) and garbage
text later in the printout.  I opened the Driver
through OpenDriver, not RamSDOpen.  I am using the
modem port.  My program works fine for small files.

Thanks in advance...

Eric W Sink
e-sink@uiuc.edu