Xref: utzoo comp.sys.ibm.pc.misc:10582 comp.dcom.modems:10486
Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!van-bc!cynic!curt
From: curt@cynic.wimsey.bc.ca (Curt Sampson)
Newsgroups: comp.sys.ibm.pc.misc,comp.dcom.modems
Subject: Re: 4.77MHz PC sufficient for 19200 bps modem?
Keywords: modem, pc
Message-ID: <1991Jun20.023034.28929@cynic.wimsey.bc.ca>
Date: 20 Jun 91 02:30:34 GMT
References: <1991Jun18.201125.6198@cs.cmu.edu>
Organization: Mad Artists' Technological Hangout
Lines: 24

In article <1991Jun18.201125.6198@cs.cmu.edu>
  jch+@cs.cmu.edu (Jonathan Hardwick) writes:

> Is the PC
> going to be able to keep up with 19200 bps?  How about 9600 bps?
> 
> Oh, and if the PC *can't* keep up, what sort of motherboard upgrade
> would we need?  10 MHz 8086?  80286?

I've got a similar question, actually.  I'm runing SCO Xenix 2.3.2 on
a 12 MHz 80286.  When testing with a V.32 modem and the FAS driver
(using a 16550 with the buffer turned on) I'm only getting about 450
cps.  Things seem to be configured correctly, so I'm at a loss to see
what could be causing this.  Could it be that my CPU just doesn't have
enough oomph to work faster?

I'd appreciate any comments or experiences that anyone can share.

cjs
-- 
                        | "I suspect the principle difference between us is
                        |  that I spend a lot of time walking around the tree
                        |  trying to find the best way to shake it while you
Curt Sampson            |  are more concerned with whether an axe or a chain-