HP Vectra Technical Reference Manual page 263

F13_SET_DASD (AH
=
017H), which sets the DASD type, must be called prior to
calling the
F13_FORMAT_FLEX function. The Set DASD type function will ensure that the internal tables
are correctly setup for the media/drive combination desired.
The programmer is also responsible for setting two values in the diskette parameter table. In
formatting either 320KB or 360KB media the programmer must set the format gap length to
SOH. The End of Track (EOn value must be set to eight (8) for 320KB media or nine (9) for
360KB media. When the format is complete the programmer should restore the two locations to
their original values. The diskette parameter table is described in table 8.2.
On Entry: AH
=
F13_FORMAT_FLEX (OSH)
AL
=
number of sectors to create
For flexible discs the following formats are standard:
Media Total Sectors
320KB 8
360KB 9
1.2MB 15
DL
=
device number (0-1)
DH
=
head number (0-1 not verified)
CH
=
track number (not verified)
For the flexible discs the valid ranges are:
Media Track Range
320KB 0-39
360KB 0-39
1.2MB 0-79
CL
=
sector number (not verified)
For the flexible disc the values in the Sector Range column are also the valid
input values for this parameter.
Media Sector Range
320KB 1-8
360KB 1-9
1.2MB 1-15
254 Disc