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From: tomb@hplsla.HP.COM (Tom Bruhns)
Newsgroups: comp.sys.amiga
Subject: Re: Pin-out for external drive needed !!!
Message-ID: <5160097@hplsla.HP.COM>
Date: 4 May 90 20:37:27 GMT
References: <1990May4.031413.5552@agate.berkeley.edu>
Organization: HP Lake Stevens, WA
Lines: 21

c60a-2fe@web-2f.berkeley.edu (Jimmy Kuei) writes:

	I have a 3.5 drive pulled from an IBM and would like to
	hook it to the external drive port of the A1000.  If anyone
	has the pin assignment for the external drive port, please
	post them or mail me.

Many BBS's have articles on how to do this.  It requires a latch for
motor drive and a circuit (very simple) to answer back to the Amiga
that it's an 80 track disk at that address (or alternatively, a 40
track disk).  I am assuming that your drive is a 300 RPM drive; if
it's like the 600 RPM ones I picked up, you are probably out of
luck ;-)

If you need more info, mail to me and I'll email some stuff back...
including an iff pic and narrative, for both 5.25 and 3.5 (40 and 80
track) drives.  Includes notes on the pits I fell in on the way ;-)

Cheers,
Tom
tomb%hplsla@hplabs.hp.com