Hayes S100 modem (80-103A) commands

From: Ed Sharpe <esharpe_at_uswest.net>
Date: Wed Oct 1 12:27:39 2003

Thanks Jack!


Ed Sharpe Archivist for SMECC

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----- Original Message -----
From: "Jack Rubin" <jack.rubin_at_ameritech.net>
To: "Classic Computer List" <cctech_at_classiccmp.org>
Sent: Tuesday, September 30, 2003 6:29 PM
Subject: Hayes S100 modem (80-103A) commands

> Sorry - I wasn't paying too much attention to this thread, but I have
> the manual for the Hayes S100 modem (80-103A) which includes a short
> modem control program written in 1977 by Dale Heatherington (the
> co-founder of DC Hayes; guess who was the marketing guy and who was the
> engineer!). Control was by bit-setting a couple of control bytes to
> handle bit (baud) rate (high/low - typically 300/110 bps, but low rate
> could also be set to 75 or 134.5 bps). Other bits set transmit enable
> (on/off), mode select (answer/originate), break, self-test, ring
> indicator, and off hook.
> The manual includes a chapter on "Applications". Section 5.5
> Telecommuting is reproduced here: "The energy situation being what it
> is, more and more people are seriously considering alternatives to
> commuting. If your job consists mostly of slaving over a hot computer
> terminal, the 80-103A may offer an economical way for your job to come
> to you instead of the other way around. Of course you would want to make
> an occasional trip to the office for meetings, but think how much pain
> and energy you could save. You might even be able to move to that
> beautiful valley 'way up there in the mountains..."
> Of course the hot setup was the PMMI modem which could be overclocked to
> 450 baud, but Don Brown died in the late '70s (?) and the company
> disappeared.
> But what the world was really waiting for was a good 1200 baud modem...
> Jack Rubin
> USRobotics 1984-95
Received on Wed Oct 01 2003 - 12:27:39 BST

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