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From: s1013734@usage.csd.oz (Peter Urbanec,5SK,6621322,6621322)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Disk drives
Message-ID: <1084@usage.csd.unsw.oz.au>
Date: 15 Feb 91 02:30:30 GMT
References: <2238@otc.otca.oz>
Sender: news@usage.csd.unsw.oz.au
Reply-To: s1013734@spectrum.cs.unsw.oz.au (Peter (A2500) Urbanec)
Organization: The Amigans Net at UNSW
Lines: 27

From article <2238@otc.otca.oz>, by elson@otc.otca.oz (Elson Markwick):

> Is it
> possible (via some small hardware hack) to make the machine boot from df1:
> instead of df0:.  I've heard that the Pheonix motherboard for the A1000 has
> this capability via a switch.  Any suggestions anyone?
>

Yes it is.
all that has to be done is crossing two wires coming out of the CIA's .They are
SEL0 and SEL1. All you have to do is connect the SEL0 where SEL1 used to go and
SEL1 where SEL0 should be. You can also wire in a switch like I did and switch
between the drives. The switch can be asily mounted at the extreme right of your
A500 just behind the disk drive. For the correct number of pins for the SELx
lines see your A500 manual. (`Introduction to the Amiga 500') There are schematics
at the back of the manual.


	+------------------------------------------------------+
	|   Peter Urbanec    s1013734@spectrum.cs.unsw.oz.au   |
	|   University of New South Wales, Sydney, Australia   |
	+------------------------------------------------------+
        |         The only sin is stupidity                    |
	|                                   - Unknown.         |
	+------------------------------------------------------+