Re: 4.77MHz PC sufficient for 19200 bps modem?

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#11116

From: Chuck Forsberg WA7KGX
Date: Thu, 20 Jun 1991 12:58

28 lines
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A 4.77 MHz PC can keep up with a 9600 bps modem.

A 16550A/AFN UART chip helps; you'll need it to make up for
newer versions of DOS.

A CGA slows things down.  Use an MDA, EGA or VGA for more speed.
Unfortunately, upgrading the display may cost more than the PC
is worth.

Most programs scroll by copying memory.  The alternate approach
(of necessity on 6800 systems) does not work well when scrolling
regions are set.

I would suggest downloading a copy of ZCOMM from TeleGodzilla or
a local BBS.  It is about as quick as they come unless tested by
PC Magazine "experts".  If the computer has a CGA try setting
ZCOMM's "display warpdrive" to speed things up.

Chuck Forsberg WA7KGX          ...!tektronix!reed!omen!caf 
Author of YMODEM, ZMODEM, Professional-YAM, ZCOMM, and DSZ
  Omen Technology Inc    "The High Reliability Software"
17505-V NW Sauvie IS RD   Portland OR 97231   503-621-3406
TeleGodzilla:621-3746 FAX:621-3735 CIS:70007,2304 Genie:CAF
-- 
Chuck Forsberg WA7KGX          ...!tektronix!reed!omen!caf 
Author of YMODEM, ZMODEM, Professional-YAM, ZCOMM, and DSZ
  Omen Technology Inc    "The High Reliability Software"
17505-V NW Sauvie IS RD   Portland OR 97231   503-621-3406

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Message-ID: <1991Jun20.125829.15405@omen.COM>

Path:

arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!samsung!olivea!tardis!tymix!uunet!nowhere!caf

References: <1991Jun18.201125.6198@cs.cmu.edu> <1991Jun20.023034.28929@cynic.wimsey.bc.ca>

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!samsung!olivea!tardis!tymix!uunet!nowhere!caf
From: caf@omen.COM (Chuck Forsberg WA7KGX)
Newsgroups: comp.sys.ibm.pc.misc,comp.dcom.modems
Subject: Re: 4.77MHz PC sufficient for 19200 bps modem?
Keywords: modem, pc
Message-ID: <1991Jun20.125829.15405@omen.COM>
Date: 20 Jun 91 12:58:29 GMT
References: <1991Jun18.201125.6198@cs.cmu.edu> <1991Jun20.023034.28929@cynic.wimsey.bc.ca>
Organization: Omen Technology INC
Lines: 28

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