0:43Eh                   Diskette Drive Recalibrate Status

Length: 1 byte

This byte indicates whether or not a diskette drive needs to be
recalibrated.


                    Diskette Drive Recalibrate Status

7 6 5 4 3 2 1 0
x . . . . . . .      Interrupt Flag
. x . . . . . .      Reserved
. . x . . . . .      Reserved
. . . x . . . .      Reserved
. . . . x . . .      Recalibrate Drive 3
. . . . . x . .      Recalibrate Drive 2
. . . . . . x .      Recalibrate Drive 1
. . . . . . . x      Recalibrate Drive 0


Note that if bits 0 through 3 are 0, the drive needs calibration.

Recalibration will retract the head to track 0.

If a drive needs recalibration and a seek is requested, then
recalibration will be performed before the seek.

INT 13h, Service 00h, will set bits 0 through 3 to 0, thereby forcing
a recalibration.

See also: INT 13h, 00h

0:43Eh Diskette Drive Recalibrate Status