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Path: utzoo!watmath!clyde!cbosgd!ihnp4!houxm!vax135!cornell!uw-beaver!tektronix!reed!omen!caf
From: caf@omen.UUCP (Chuck Forsberg WA7KGX)
Newsgroups: net.micro.pc,net.wanted
Subject: Re: 1200/75 Communications program on IBM PC
Message-ID: <243@omen.UUCP>
Date: Thu, 10-Oct-85 13:26:46 EDT
Article-I.D.: omen.243
Posted: Thu Oct 10 13:26:46 1985
Date-Received: Sat, 12-Oct-85 19:46:24 EDT
References: <557@ark.UUCP>
Reply-To: caf@.UUCP (Chuck Forsberg WA7KGX)
Organization: Omen Technology, Portland
Lines: 13
Xref: watmath net.micro.pc:5565 net.wanted:7342

The standard IBM async comm card would need a hardware modification to
operate split speed.  Break the run between pin 15 and pin 9 on the 8250,
and feed 16x the receive rate to pin 9.  Set the program's speed to the
desired transmit rate and you're in business.

A divide by 96 counter driven by the 1.8432 mHz clock would do the trick.

-- 
  Chuck Forsberg WA7KGX   ...!tektronix!reed!omen!caf   CIS:70715,131
Omen Technology Inc     17505-V NW Sauvie Island Road Portland OR 97231
Home of Professional-YAM, the most powerful COMM program for the IBM PC
Voice: 503-621-3406     Modem: 503-621-3746 (Hit CR's for speed detect)
omen Any ACU 1200 1-503-621-3746 se:--se: link ord: Giznoid in:--in: uucp