Legacy Document

Important: The information in this document is obsolete and should not be used for new development.

Chapter 4 - Vertical Retrace Manager / Vertical Retrace Manager Reference

Vertical Retrace Manager Routines / Slot-Based Installation and Removal Routines

SlotVRemove
You can use the SlotVRemove function to remove a task record from a slot-based vertical retrace queue.
FUNCTION SlotVRemove (vblTaskPtr: QElemPtr; theSlot: Integer): 
                      OSErr;
vblTaskPtr
A pointer to the task record to remove from its queue.
theSlot
The slot number of the video device from whose vertical retrace queue the task record is removed.

DESCRIPTION
The SlotVRemove function removes the task record specified by the vblTaskPtr parameter from the vertical retrace queue associated with the video device specified by the theSlot parameter.
To disable a slot-based VBL task temporarily, you can set the vblCount field of the task record to 0.

ASSEMBLY-LANGUAGE INFORMATION
The registers on entry and exit for SlotVRemove are
Registers on entry
A0 Pointer to the task record
D0 Slot number of the device associated with the vertical retrace queue

Registers on exit
D0 Result code

RESULT CODES
noErr 0 No error
qErr -1 Task record isn't in the queue
vTypErr -2 Invalid qType value (must be ORD(vType))
slotNumErr -360 Invalid slot number

Registers on entry
A0	Pointer to the task record
D0	Slot number of the device associated with the vertical retrace queue

noErr	0	No error
qErr	-1	Task record isn't in the queue
vTypErr	-2	Invalid `qType` value (must be `ORD(vType)`)
slotNumErr	-360	Invalid slot number

Legacy Document

SlotVRemove

DESCRIPTION

ASSEMBLY-LANGUAGE INFORMATION

RESULT CODES noErr0No error qErr-1Task record isn't in the queue vTypErr-2Invalid qType value (must be ORD(vType)) slotNumErr-360Invalid slot number

RESULT CODES
noErr 0 No error
qErr -1 Task record isn't in the queue
vTypErr -2 Invalid `qType` value (must be `ORD(vType)`)
slotNumErr -360 Invalid slot number