Autodocs
Devices:
trackdisk.device
CMD_CLEAR
CMD_READ
CMD_UPDATE
CMD_WRITE
TD_ADDCHANGEINT
TD_CHANGENUM
TD_CHANGESTATE
TD_EJECT
TD_FORMAT
TD_GETDRIVETYPE
TD_GETGEOMETRY
TD_GETNUMTRACKS
TD_MOTOR
TD_PROTSTATUS
TD_RAWREAD
TD_RAWWRITE
TD_REMCHANGEINT
TD_SEEK
Include
GuruMeditation
|
Docs » Autodocs » trackdisk.device » TD_MOTOR
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.
If the motor is just being turned on, the device will delay the
proper amount of time to allow the drive to come up to speed. Normally,
turning the drive on is not necessary, the device does this
automatically if it receives a request when the motor is off. However,
turning the motor off is the programmer's responsibility.
In addition, the standard instructions to the user are that it is safe
to remove a disk from a drive if and only if the motor is off (that is,
if the disk light is off).
IO REQUEST INPUT
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 REQUEST RESULT
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.
|
