GPD_SETTRIGGER

Set the conditions for a game port report

This command sets what conditions must be met by a game port unit before a pending Read request will be satisfied. These conditions, called triggers, are independent. That any one occurs is sufficient to queue a game port report to the Read queue. These conditions are inquired with AskTrigger.

This command always executes immediately.

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_SETTRIGGER

io_Flags

IOB_QUICK set if quick I/O is possible

io_Length

sizeof(gamePortTrigger)

io_Data

a structure of type GamePortTrigger, which has the following elements

gpt_Keys

GPTB_DOWNKEYS set if button down transitions trigger a report, and GPTB_UPKEYS set if button up transitions trigger a report

gpt_Timeout

a time which, if exceeded, triggers a report; measured in vertical blank units (60/sec)

gpt_XDelta

a distance in x which, if exceeded, triggers a report

gpt_YDelta

a distance in y which, if exceeded, triggers a report