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From: gwyn@Brl-Vld.ARPA
Newsgroups: net.micro.apple
Subject: more about ProDOS peripheral recognition
Message-ID: <653@sri-arpa.UUCP>
Date: Fri, 11-May-84 21:36:03 EDT
Article-I.D.: sri-arpa.653
Posted: Fri May 11 21:36:03 1984
Date-Received: Mon, 14-May-84 00:55:26 EDT
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From:      Doug Gwyn (VLD/VMB) <gwyn@Brl-Vld.ARPA>

I wasn't entirely correct when I said that ProDOS doesn't care
what peripherals you have but that the STARTUP routine looks at
the signature bytes when you select the S[lots] option.

Actually, ProDOS does look for disk devices and a clock card.
It is things like serial line interfaces, printers, and mice
that it pays no particular attention to until the IN# or PR#.