User`s manual

.DSKCFIG
5-22
5
Configuration Area Block CFGA Fields
Attribute Mask -- IOSATM and IOSEATM
The IOSATM field bits are defined in the following table: A 1 in a
particular bit position indicates that the corresponding attribute
from the attributes (or extended attributes) word should be used to
update the configuration. A 0 in a bit position indicates that the
current attribute should be retained.
All IOSEATM bits are undefined and should be set to 0.
Parameter Mask -- IOSPRM and IOSEPRM
The IOSPRM and IOSEPRM bits are defined in the following tables.
A 1 in a particular bit position indicates that the corresponding
parameter from the configuration area (CFGA) should be used to
update the device configuration. A 0 in a bit position indicates that
the parameter value in the current configuration will be retained.
Table 5-4. IOSATM Fields (CFGA)
Label
Bit
Position
Description
IOADDEN 0 Data density
IOATDEN 1 Track density
IOADSIDE 2 Single/double sided
IOAFRMT 3 Floppy disk format
IOARDISC 4 Disk type
IOADDEND 5 Drive data density
IOATDEND 6 Drive track density
IOARIBS 7 Embedded servo drive seek
IOADPCOM 8 Post-read/pre-write precompensation
IOASIZE 9 Floppy disk size
IOATKZD 13 Track zero data density