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INT 13h, 17h (23) Set DASD Type for Format many
This service sets the type of diskette for a particular type of drive
in order that the disk is properly formatted. This service can be
performed on diskettes only.
On entry: AH 17h
AL Diskette/drive combination (see below)
DL Drive number (bit 7 must be clear)
Returns: CF Set if error, else cleared
AH Status of operation (see Service 01h)
--------------------------------------------------------------------------
Diskette/Drive Combination
AL Meaning
01h Diskette 320/360K in 360K drive
02h Diskette 360K in 1.2M drive
03h Diskette 1.2M in 1.2M drive
04h Diskette 720K in 720K drive
--------------------------------------------------------------------------
Notes: This service is not available for PCs, PCjrs, and
XTs dated before 1/10/86.
A diskette/drive combination value of 04h is not
valid for ATs before 6/10/85.
For the AT, XT-286, and PC Convertible, the BIOS
executes INT 15h, Service 90h (Device Busy), for the
diskette (Type = 01h) prior to waiting for the
interrupt. INT 15h, Service 91h (Interrupt
Complete), is executed upon completion. Diskette
operations that require the diskette motor to be on
will call INT 15h, Service 90 (Device Busy), with
the type equal to "Diskette Drive Motor Start" (Type
= FDh). This allows the system to perform another
task while the drive motor is waiting to get up to
speed.
See Also:
INT 13h, 01h
INT 13h, 15h
INT 13h, 16h
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