On 12/27/2011 01:40 PM, Enrico Lazzerini wrote:
Well this is all i know:
8"
STAT d:DSK:
9600
r: 128 Byte Record Capacity
Thats 1.28mb! Not many system used that and some like DEC RX02, Intel
MDS DD
were not MFM ( both were unique oddbal that most FDCs do not read).
1200
k: Kilobyte Drive Capacity
128
d: 32 Byte Directory Entries
128
c: Checked Directory Entries
128
e: Records/ Extent
16
b: Records/ Block
64
s: Sectors/ Track
What format are you trying to achieve?? Looks vaguely like Morrow DD.
2
t: Reserved 'rracks
2
SIDES
This is that I calculate:
BEGIN SCO2 (1024 bytes/sector) - DSDD 8"
DENSITY MFM ,HIGH
CYLINDERS 77 SIDES 1 SECTORS 8,1024
SIDE1 0 1,2,3,4,5,6,7,8,9
SIDE2 0 1,2,3,4,5,6,7,8,9
Likely does not start with sector 0, that is unlikely due to the bit
pattern and how DD controllers work.
Besides 0 though 9 enumerates 10 objects, not 8.
ORDER CYLINDERS
BSH 4 BLM 15 EXM 3 DSM 599 DRM 127 AL0 0C0H AL1 0 OFS 2
Looks about right.
There is no skew applied as you show it.
If skew is wrong reading the directory is impossible and you get trash
if anything at all.
Allison
END
Here what 22disk tell me:
http://elazzerini.interfree.it/Foto2982.jpg
Where I'm wrong?
Thanks for any suggestion.
Enrico