0:43Fh                   Diskette Drive Motor Status

Length: 1 byte

This byte indicates which diskette drive is currently selected and
which diskette drive motors are on.


                     Diskette Drive Motor Status

7 6 5 4 3 2 1 0
x . . . . . . .      Read/Write Operation
. x . . . . . .      Reserved
. . x x . . . .      Diskette Drive Select Status (see below)
. . . . x . . .      Diskette Drive 3 Motor On Status
. . . . . x . .      Diskette Drive 2 Motor On Status
. . . . . . x .      Diskette Drive 1 Motor On Status
. . . . . . . x      Diskette Drive 0 Motor On Status


Bits 3 through 0 control the motor status of the different diskette
drives. If set, then the specified drive motor is on.

                 Diskette Drive Select Status (bits 5 and 4)

00 --  Diskette Drive 0 Selected
01 --  Diskette Drive 1 Selected
10 --  Diskette Drive 2 Selected
11 --  Diskette Drive 3 Selected

INT 08h will turn the Motor On bits off (bits 3 - 0) when the motor
counter (0:440h) reaches 0.

See also: INT 08h
See also: 0:440h

0:43Fh Diskette Drive Motor Status