Subject: Re: Floppy driver
To: None <>
From: David Jones <>
List: amiga-dev
Date: 02/28/1994 13:49:45
> I think I know how to do it. There will be a bit or two in the minor #
> which tells the driver what type of disk it is. Then the code that does
> the track decoding can be different. What I'm not sure of though is if
> the MSDOS disk ca be handled in the same way as the amiga (on a track
> basis - not by sector).

Best to do the following with minor device #:


	D = density: 0=low (720/880) 1=high (1.44/1.76)
	P = PC? 0=amiga (880/1.76) 1=pc (720/1.44)
	U = unit (0-3)

PC and Amiga formats both use MFM with 0x4489 as the sync pattern.  The
track I/O code can be shared.  The sector decode code cannot.

David Jones, M.A.Sc student, Electronics Group (VLSI), University of Toronto
email:, finger for more info/PGP public key