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COMMON COMMAND SET AND DISK OPERATION
A-12
A
Mode Select Parameter List: Page 3 Parameters for Winchester drives (cont’d)
8 (Note 4) Alternate tracks per volume (MSB)
9 (Note 4) Alternate tracks per volume (LSB)
A (Note 5) Sectors per track (MSB)
B (Note 5) Sectors per track (LSB)
C (Note 6) Bytes per sector (MSB)
D (Note 6) Bytes per sector (LSB)
E (Note 7) Interleave (MSB)
F (Note 7) Interleave (LSB)
10 (Note 8) Track skew factor (MSB)
11 (Note 8) Track skew factor (LSB)
12 (Note 9) Cylinder skew factor (MSB)
BYTE OFFSET
VALUE COMMENTS
13 (Note 9) Cylinder skew factor (LSB)
14 (Note 10) Drive type field
15 (Note 11) Reserved
16 (Note 11) Reserved
NOTES:
1. Tracks per zone is set to $0001 if bit 11 (track = zone flag) of
the attach packets attribute word (byte offset $10) is = 0.
Tracks per zone is set to the number of heads (attach packet
byte offset $07) if bit 11 (track = zone flag) of the attach
packets attribute word (byte offset $10) is = 1.
2. Alternate sectors per zone is taken from the attach packets
alternate sectors per zone field (byte offset $1E for "old"
attach ($08), or offset $28 for "new" ATTACH ($78)).
3. Alternate tracks per zone field is left as the default value as
returned from the mode sense command.
BYTE OFFSET
VALUE COMMENTS