GPD_READEVENT

Return the next game port event.

Read game port events from the game port and put them in the data area of the iORequest. If there are no pending game port events, this command will not be satisfied, but if there are some events, but not as many as can fill IO_LENGTH, the request will be satisfied with those currently available.

io_Message

mn_ReplyPort set if quick I/O is not possible

io_Device

preset by the call to OpenDevice

io_Unit

preset by the call to OpenDevice

io_Command

GPD_READEVENT

io_Flags

IOB_QUICK set if quick I/O is possible

io_Length

the size of the io_Data area in bytes: there

are sizeof(inputEvent) bytes per input event.

io_Data

a buffer area to fill with input events. The fields of the input event are:

ie_NextEvent

links the events returned

ie_Class

is IECLASS_RAWMOUSE

ie_SubClass

is 0 for the left, 1 for the right game port

ie_Code

contains any gameport button reports. No report is indicated by the value 0xff.

ie_Qualifier

only the relative and button bits are set

ie_X

see next

ie_Y

the x and y values for this report, in either relative or absolute device dependent units.

ie_TimeStamp

the delta time since the last report, given not as a standard timestamp, but as the frame count in the TV_SECS field.

This function sets the error field in the iORequest, and fills the iORequest with the next game port events (but not partial events).

gameport.device/SetCType, gameport.device/SetTrigger