Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!rice!sun-spots-request
From: gfr@cobra.mitre.org (Glenn Roberts)
Newsgroups: comp.sys.sun
Subject: Re: Experiences with 386i serial ports under DOS
Message-ID: <8902161302.AA02088@cobra.mitre.org>
Date: 28 Feb 89 15:28:45 GMT
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Original-Date: Thu, 16 Feb 89 08:02:04 EST
X-Sun-Spots-Digest: Volume 7, Issue 172, message 14 of 15
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>  We have found that both the 386i serial port and ports on a multi-
>  port card (Comtrol h550) operate fine under Unix, in both directions,
>  upto 9600 baud... <but under DOS> ...When trying to transmit files
>  between two machines, 1200 baud is ok, but any higher causes DOS
>  window to evaporate

There's no question that the place you're most likely to get into trouble
on the DOS side of a 386i is any software that tries to do "real time"
interrupt handling.  This includes communication boards, speech boards,
A/D converters, etc.  Remember that the DOS interrupt handlers aren't
really talking to the hardware directly - they're going through Unix!
Sun's answer to this is likely to be "use the Unix side" (e.g. run Kermit
in a shelltool).  I understand that this isn't always the answer though.

- Glenn Roberts, The MITRE Corp., McLean VA (703) 883-6820
  gfr@cobra.mitre.org