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From: guy@ns.network.com (Guy D'Andrea)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Disk drives
Message-ID: <1991Feb5.131924.5981@ns.network.com>
Date: 5 Feb 91 13:19:24 GMT
References: <1384@pdxgate.UUCP> <2256@otc.otca.oz> <38847@cup.portal.com>
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In article <38847@cup.portal.com> FelineGrace@cup.portal.com (Dana B Bourgeois) writes:
>I understood that the designation of which drive is df1 and which is
>df0 or 2 or 3 is in the cable.  Couldn't the cable be changed to select
>a different drive by swapping one of the wires around somehow?  I don't
>have a schematic or I'd look and be able to say for sure.

Actually it depends on the machine you have I believe.  I have a 2000 and there
is a chip (U301) which does the selecting of all the floppy drives.  I did not
want to put a drive in my second bay because I put a 3.5" hard drive there
instead.  But some software wants to see DF0: and DF1: only.  So I pulled U301
and bent pins 14 & 15 up and then replaced the chip back into the socket.
Pin 14 is the select line for DF1: and pin 15 is select DF2:.  I then ran a
wire from pin 14 on the chip to pin 15 on the socket.  Pluged in my external
floppy drive into the external port and LOW AND BEHOLD it was DF1:!
 
I have run this way for about six months without a problem.  This way I 
didn't have to modify the drive since I have a Bridgeboard and sometimes need
to plug the drive into that board.... Gee, I hope this help answer the question... Sorry for getting so long.  Later!!!