Bad Track Sector List in CBM DOS 3.0 (8280, 9060 and 9090)

From: Martin Hoffmann-Vetter <>
Date: Mon, 8 Apr 2013 16:34:46 +0200
Message-ID: <00c801ce3466$38031e00$>

at the DISK-DESCRIPTOR block (track 0, sector 1) is at offset 0 a pointer to
a bad track sector list. This points to track 0, sector 2. Is this bad track
sector list only one block or is this a block chain? Does this list starts
at offset 0 (without the chain pointer) or at 2? Is this different at the
floppy disk (8280) and the hard disk (9060 or 9090)?

The hard disks (9060 and 9090) hat an error code while the hd was formated
with to many bad blocks (flash codes 11 or 12). Does this occure if the bad
track sector list is full? What is the maximum entries in this table? (Okay,
if only one block is allowed, the max. count is 128.)

A disk image file for the 9060 and the 9090 ist defined as a d60 and d90
file. Exists there a file definition for the 8280, too?

Thanks and Regards


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Received on 2013-04-08 16:02:00

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