[BBC-Micro] Disk fault 0C at 00/00

Sprow info at sprow.co.uk
Fri Apr 25 07:40:37 BST 2008


In article <Pine.WNT.4.64.0804242324090.4012 at zapac>,
   Anders Carlsson <anders.carlsson at sfks.se> wrote:
> Sometimes I get it to report disk fault 0B.

[snip]

> In which manual can I obtain a list of disk errors and what they mean?

Application note 19 details the error numbers:



Support Group Application Note Number: 019 
------------------------------------------
Copyright (C) Acorn Computers Limited 1992
Acorn Computers Limited
Acorn House
Vision Park
Histon
Cambridge       CB4 4AE

DFS Error Messages

Applicable Hardware: BBC B
                     BBC B+
                     BBC Master 128

There have been a number of revisions of the DFS firmware and software
fitted to the various 8 bit machines. The error messages have remained
consistent throughout the revisions and this application note lists the
fault numbers with a description.

Error 08 (clock error)

During a disc read operation a clock bit was missing.

Error 0A (late DMA)

During a disc transfer the processor did not respond fast enough, most
likely due to a faulty disc interface card.

Error 0C (ID Field CRC error)

The cyclic redundancy check derived from the data read back differed from
that stored on the disc.

Error 0E (data CRC error)

The cyclic redundancy check derived form the data read back differed from
that stored on the disc during a disc read.

Error 10 (drive not ready)

During a transfer the disc stopped rotating. Often caused by a badly
inserted disc.

Error 12 (write protect)

Disc in drive has write protect tab covered
 
Error 14 (track zero not found)

Controller failed to find track zero. Often an unformatted disc.

Error 18 (sector not found)

Controller failed to find required sector. Either a corrupted or an
unformatted disc.






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