User`s manual

.DSKCFIG
5-20
5
The Disk Packet Parameters are shown in the following table. The
parameters that do not have an exact equivalent CFGA field are
indicated with an asterisk (*).
Attributes
Flags
Equivalent to the IOSATW and IOSEATW Þelds,
with the lower half-word equivalent to IOSATW,
and the upper half-word equivalent to IOSEATW
Parameters The parameters used for device reconÞguration are
speciÞed in this area. Most parameters have an
exact CFGA equivalent.
Table 5-3. Disk Packet Parameters
Parameter
Offset
(Bytes)
Length
(Bytes)
CFGA
Equivalent Description
P_DDS* $10 1 N/A Device descriptor size. For internal use
only, this Þeld does not have an
equivalent CFGA Þeld. It should be set
to 0.
P_DSR $11 1 IOSSR Step rate (encoded). Refer to the IOSSR
Þeld in Table 5-8 for step rate code
values.
P_DSS* $12 1 IOSPSM Sector size, encoded as follows
(IOSPSM is a two-byte Þeld containing
the actual sector size):
$00 128 bytes
$01 256 bytes
$02 512 bytes
$03 1024 bytes
$04
-
$FF
Reserved encodings