Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!seismo!husc6!mit-eddie!ll-xn!ames!amdcad!sun!pepper!cmcmanis
From: cmcmanis%pepper@Sun.COM (Chuck McManis)
Newsgroups: comp.sys.amiga
Subject: Re: mount vs. 3.5" drives & diskchange
Message-ID: <24474@sun.uucp>
Date: Wed, 29-Jul-87 21:27:06 EDT
Article-I.D.: sun.24474
Posted: Wed Jul 29 21:27:06 1987
Date-Received: Sat, 1-Aug-87 02:16:00 EDT
References: <13964@watmath.UUCP> <2146@cbmvax.UUCP> <641@neoucom.UUCP>
Sender: news@sun.uucp
Reply-To: cmcmanis@sun.UUCP (Chuck McManis)
Organization: Sun Microsystems, Mountain View
Lines: 16

In article <641@neoucom.UUCP> wtm@neoucom.UUCP (Bill Mayhew) writes:
>
>You can order the Amiga schematics from the C-A people in West Chester, PA. 
>There is a PAL chip on the drive interface board.  It does at least
>three things I know of.

Huh? In my schematics the 3.5" pcb has a 74LS74 and a 7438, whereas the
5.25" drive has these plus a 74LS132 and a PST518B (labeled as Q1) it
acts as a schmidt trigger apparently because it is connected to an RC
bridge which provides a power on reset signal. If you are going to play
with the Amiga hardware I strongly reccomend the schematics _from Commodore_
since they are chock full of info.

--Chuck McManis
uucp: {anywhere}!sun!cmcmanis   BIX: cmcmanis  ARPAnet: cmcmanis@sun.com
These opinions are my own and no one elses, but you knew that didn't you.