Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!zaphod.mps.ohio-state.edu!van-bc!ubc-cs!scheme.cs.ubc.ca!b3076906
From: b3076906@scheme.cs.ubc.ca (adrian michael boyko)
Newsgroups: comp.lang.scheme
Subject: PC-Scheme serial I/O
Message-ID: <1990Dec7.184210.1106@scheme.cs.ubc.ca>
Date: 7 Dec 90 18:42:10 GMT
Sender: news@scheme.cs.ubc.ca
Organization: Scheme Lab, Computer Science, UBC, Vancouver, B.C., Canada
Lines: 12


I'm hoping for some help with PC-Scheme serial I/O.  I'm having no
trouble with output, but I'm getting results I don't understand when I
use an input-port defined with (define modem-in (open-input-file "com1")).
For example, (read-line modem-in) will often give me an undocumented "[VM
ERROR encountered!] 196".  (char-ready? modem-in) will often go away for
several minutes before returning #\.

The hardware is fine.  Any comments welcome via email.

Adrian_Boyko@cc.sfu.ca
b3076906@scheme.cs.ubc.ca