Re: D9090 back to life !

From: A. Fachat <>
Date: Mon, 27 Jan 2014 12:37:33 +0100
Message-ID: <>
The Track number starts at zero? But there can't be any data blocks there 
as track 0 says "end of file block"....

Btw the file extension d90 should be free for use, but d60 might be used 
for the (even more scarce?) 8060 8" floppy drives...


Am 27. Januar 2014 12:11:17 schrieb Rob Clarke <>:

> >> I'd now like to extract a complete image of the drive to see if there is 
> any deleted files that may be of interest. I was going to use the 
> WMUTIL.PRG basic/ml program written by Andre Fachet and Bo Zimmerman to 
> pull an image but does the concept of a .D90 image exist?
> > Why not, it should just be an image in ascending order of
> > (track,sector), 256 bytes per sector.
> > The cbmlink software by me includes a disk image reader, which
> > basically increments the sector and track counters until an illegal
> > track or sector is reported, and then steps to sector 0 on the next
> > track, or ends copying when the track number becomes invalid.
> > I hope that the WMUTIL.PRG does the same.
> Yes, it does (only I spelt it wrong, it's EMUTIL). The only gotcha is that 
> the track numbers run from 0 on the D9060/D9090 and 1 on the floppy drives.
> > It should not be too hard to modify cbmconvert to support D9090
> > images.  There is only a single directory, right? And the maximum file
> > system size is 255 tracks, 256 sectors per track, 256 bytes per
> > sector, right?  That would be a bit under 16 megabytes (16 MiB - 64
> > KiB).
> > I could actually be interested to do this; it has been a while since I
> > updated the tool. :)
> Sounds olike an excellent plan! I'm not yet familiar with the detailed 
> internals for the HD's but yes, I think so. As I said above the tracks go 
> from 0-152 and the sector numbers run from 0-127 on the D9060 and 0-195 on 
> the D9090.
> Rob
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Received on 2014-01-27 12:02:06

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