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Path: utzoo!utgpu!water!watnot!watmath!clyde!rutgers!lll-lcc!well!abd
From: abd@well.UUCP
Newsgroups: comp.sys.cbm
Subject: Re: 1541 8/9 switch
Message-ID: <2636@well.UUCP>
Date: Mon, 23-Feb-87 16:58:10 EST
Article-I.D.: well.2636
Posted: Mon Feb 23 16:58:10 1987
Date-Received: Thu, 26-Feb-87 19:47:32 EST
References: <2221@mb2c.UUCP>
Reply-To: abd@well.UUCP (AbdulRahman Dennis Lomax)
Organization: Whole Earth 'Lectronic Link, Sausalito, CA
Lines: 16
Keywords: C64, 1541, easy

In article <2221@mb2c.UUCP> jbh@mb2c.UUCP writes:
>I have discovered an interesting method of adding unit eight/nine selection 
to
>a 1541.  My technique does not require any external switches, only a single
>two inch wire inside the case.
> ....
>You have just wired the disk controller address option pad to the write prot
ect
>sensor. .......

Unfortunately, this method will default to drive 9 if a read-only disk
is fully inserted when a drive reset occurs. This will make it unusable
with some commercial copy-protected games which require a drive 8 and
which apparently reset the drive as part of their scheme. The proposed
modification will make it impossible to use this software with the
drive....