Date   : Sun, 12 Dec 2004 01:21:46 +0000
From   : jgh@... (Jonathan Graham Harston)
Subject: ADFS and IDE drives

Hurrah! I've got ADFS working with the IDE interface.
See http://www.mdfs.net/Info/Comp/BBC/IDE/ADFS
I'll start assembling some more interfaces now, and I'll
reply to the various people who have emailed me wanting
to buy one!
 
A few points:
 
In testing ADFS occasionally calculated the Free Space Map
checksum incorrectly, so gave "Bad FS map" errors. It did
this consistantly very occasionally (if you know what I
mean...) So, for version 1.13 of the IDEPatch I have just
disabled the "Bad FS map" error code.
 
The patch currently makes the ADFS file system occupy the
entire hard drive, starting at logical sector zero. I may
change this so that ADFS's sector zero is futher into the
IDE drive. For example, HADFS's sector zero is at IDE
logical sector &100.
 
This way, the drive could have a boot block at the
beginning of the drive that would be recognised by other
systems. I'm going to experiment with drives with other
file systems on them and have a play around. I may even
get around to playig around with a CD-ROM drive :)
 

-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
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