User`s manual

.DSKCFIG
5-21
5
P_DBS* $13 1 IOSREC Record (Block) size, encoded as follows
(IOSREC is a two-byte Þeld containing
the actual block size):
$00 128 bytes
$01 256 bytes
$02 512 bytes
$03 1024 bytes
P_DST* $14 2 IOSSPT Sectors per track; P_DST is a two byte
Þeld, IOSSPT is a one-byte Þeld.
P_DIF $16 1 IOSILV Interleave factor
P_DSO $17 1 IOSSOF Spiral offset
P_DSH* $18 1 IOSSHD Starting head; This Þeld is equivalent to
the lower byte of IOSSHD.
P_DNH $19 1 IOSHDS Number of heads
P_DNCYL $1A 2 IOSTRK Number of cylinders
P_DPCYL $1C 2 IOSPCOM Precompensation cylinder
P_DRWCY
L
$1E 2 IOSRWCC Reduced write current cylinder
P_DECCB $20 2 IOSECC ECC data burst length
P_DGAP1 $22 1 IOSGPB1 Gap 1 size
P_DGAP2 $23 1 IOSGPB2 Gap 2 size
P_DGAP3 $24 1 IOSGPB3 Gap 3 size
P_DGAP4 $25 1 IOSGPB4 Gap 4 size
P_DSSC $26 1 IOSSSC Spare sectors count
P_DRUNIT $27 1 IOSRUNIT Reserved area units
P_DRCALT $28 2 IOSRSVC1 Reserved count 1 (for alternate mapping
area)
P_DRCCTR $2A 2 IOSRSVC2 Reserved count 2 (for controller)
Table 5-3. Disk Packet Parameters
Parameter
Offset
(Bytes)
Length
(Bytes)
CFGA
Equivalent Description