From: "Dave Dunfield" <dave04a_at_dunfield.com>
Sent: Saturday, February 19, 2005 10:15 AM
>>With my Osborne-1 single density disks, I can only read Id's with
>>MDM (ie: DoubleDensity) selected, and ... I read 5 sectors/track
>
>> ...
>
>>Why do they "appear" to read at FM 1024 byte sectors (with correct
>>1-5 sector numbers/ordering)?
>
> Dave you hack! - Can't you even take the time to proofread your
> postings??? Clearly that should read "MFM" in both cases.
>
> --
> 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
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
Remember most PC disk controllers can't handle FM.
Randy
Received on Sat Feb 19 2005 - 10:31:31 GMT