Thanks Randy,
>Going by 22disk:
>
>BEGIN OSB1 Osborne 1 - SSSD 48 tpi 5.25"
>DENSITY FM ,LOW
>CYLINDERS 40 SIDES 1 SECTORS 10,256
>SIDE1 0 1,3,5,7,9,2,4,6,8,10
>BSH 4 BLM 15 EXM 1 DSM 45 DRM 63 AL0 080H AL1 0 OFS 3
>END
I keep forgetting about 22disks database... Thanks for
the reminder.
>Remember most PC disk controllers can't handle FM.
I still haven't figured out what is going on ... I have
other disks which have single-density system tracks with
the rest double-density, and they show as single-density
128-byte sectors when I try and do "read id" on them.
It just some disks (like the Osborne SD) which only "read
id" as DD 1024 byte sectors - I can only assume that there
is some difference in the low-level format structure -
perhaps these are not created in a completely IBM 3740
compatible format...
Regards,
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Collector of vintage computing equipment:
http://www.parse.com/~ddunfield/museum/index.html
Received on Sat Feb 19 2005 - 20:21:54 GMT