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Re: Floppy to DOS Master
- Subject: Re: Floppy to DOS Master
- From: "sicklittlemonkey" <Nick.Westgate@gmail.com>
- Date: 2 Mar 2007 08:36:00 -0800
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On Mar 3, 1:10 am, "Guillaume Tello" <houten....@wanadoo.fr> wrote:
> Part of the software still accesses to S6,D1... What sequence should I be
> looking for in assembler? how does a program tell the machine it wants to
> read from a specific drive?
Usually:
BD 8A C0 - LDA $C08A,X ; for drive 1
BD 8B C0 - LDA $C08B,X ; for drive 2
If you can't find that sequence the easiest way to proceed is to use
AppleWin with a memory breakpoint on $C0EA (assuming slot 6). In the
debugger type:
BPM C0EA
G
Cheers,
Nick.