Date   : Mon, 04 Aug 2008 09:24:41 +0100
From   : bbcmailinglist@... (Ian Wolstenholme)
Subject: ADFS disc image interleave?

I know I used to have problems when trying to write ADFS disc images on a PC.
The 640K images never seemed to work, it was putting head 0 track 0 next
to head 1 track 0 etc. so jumbling everything up.  It was probably an incorrect
setting with FDC but as far as I remember, I've been able to do this OK with
Omniflop as I've got things like the FileStore Welcome Disc successfully from
.adf image onto a disc.

BBC ADFS only uses 256-byte sectors.  I think the Archimedes uses 1024
byte sectors, others will know more about this.

Best wishes,



Ian


----- Original Message -----
From: Greg Cook [mailto:debounce@...]
To: bbc-micro@...
Sent: Sat, 2 Aug 2008 19:37:44 +0000 (GMT)
Subject: [BBC-Micro] ADFS disc image interleave?

Hello all,

A couple of basic questions about disc image files:-

1) Is there some documentation for .adl, .add, .ade and .adf files?  I have
dumps of each side of some discs that I'm looking to merge.  A quick glance
at some existing .adls shows lots of texture breaks not necessarily at 4
KB boundaries.
2) What does it mean when there are five 1024 byte sectors in a track numbered
from 1 to 5 instead of 0 to 4?

Thanks for your help

Greg Cook
debounce@...
http://homepages.tesco.net/~rainstorm/


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