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From: robertsw@gtephx.UUCP (Wild Rider)
Newsgroups: comp.sys.ibm.pc.misc,comp.dcom.modems
Subject: Re: 4.77MHz PC sufficient for 19200 bps modem?
Keywords: modem, pc
Message-ID: <1991Jun24.180401.372@gtephx.UUCP>
Date: 24 Jun 91 18:04:01 GMT
References: <1991Jun18.201125.6198@cs.cmu.edu> <1991Jun20.023034.28929@cynic.wimsey.bc.ca> <1991Jun20.125829.15405@omen.COM>
Reply-To: robertsw@gtephx.UUCP (Wild Rider)
Organization: AG (formerly GTE) Comm. Sys., Phx, AZ
Lines: 32

In article <1991Jun20.125829.15405@omen.COM> caf@omen.COM
(Chuck Forsberg WA7KGX) writes:
>A 4.77 MHz PC can keep up with a 9600 bps modem.

	as part of a project i was involved in, i wrote a vt100 comm program
	with the requirement that it had to keep up with a dec vt100 terminal
	at 9600 bps, even when running on a 4.77mhz pc.  it did, but just
	barely.  the comm program (called pc100) was (is) written entirely in c,
	yes, even the comm port isr.  ("assembly?  we don't need no steenkin'
	assembly!" :-)  the default receive buffer was 2k, which created an
	"interesting" delay when you pressed ctrl-s to suspend. :-)

	actually, with proper handshaking & buffering, even a plain old pc
	should be able to just keep it's head above water at 19.2kbps.  don't
	expect any background/foreground stuff, though! :-)

>-- 
>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

	i suppose in the presence of a wizard like chuck forsberg, any pc
	would perform well, even at 9600 bps. :-)

	cheers,
	wr (the wild rider)
-- 
Wallace Roberts, AG (formerly GTE) Communication Systems, Phoenix, AZ
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