TD_MOTOR/ETD_MOTOR - control the on/off state of a drive motor.

This command gives control over the disk motor. The motor may be turned on or off. When it is on, the drive light automatically turns on as well.

This command is directly forwarded to the trackdisk.device.

io_Device

preset by the call to OpenDevice()

io_Unit

preset by the call to OpenDevice()

io_Command

TD_MOTOR or ETD_MOTOR

io_Flags

0 or IOF_QUICK

io_Length

the requested state of the motor, 0 to turn the motor off, and 1 to turn the motor on.

iotd_Count

(ETD_MOTOR only) maximum allowable change counter value.

io_Error

0 for success, or an error code as defined in <devices/trackdisk.h>

io_Actual

if io_Error is 0 this contains the previous state of the drive motor.