Entry
R0 = version indicator
R1 = task handle (or 0 if you don‘t have a task handle)
R2 = features flags
R3 -> name (or 0 if you don‘t have a name)
NB: R0,R2-R3 are not needed if you are passing a task handle.
Exit
R0 = old version indicator
R1 = old task handle (or 0 if the previous user wasn‘t a Wimp task)
R2 = old features flags
R3 -> old name
Informs WimpExtension that a different program wishes to use WimpExtension‘s SWIs. This call is provided so that non-Wimp-tasks can use WimpExtension SWIs. After finishing using the SWIs you should restore the previous user by calling WimpExt_BackgroundTask with the parameters returned from when you claimed it. ie :
SYS "WimpExt_BackgroundTask",17,0,0,"MyPatch" TO R0%,R1%,R2%,R3%
... use WimpExtension SWIs ...
SYS "WimpExt_BackgroundTask",R0%,R1%,R2%,R3%
Only pass a task handle to WimpExt_BackgroundTask if you have called WimpExt_Initialise previously (ie. WimpExt_BackgroundTask will call WimpExt_CurrentTask).
Provided by Kernel
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