Showing changes from revision #3 to #4:
Added | Removed | Changed
Entry | |
---|---|
R11 | Bit |
0 => Escape condition is being cleared/acknowledged | |
1 => Escape condition is being set | |
R12 | “workspace” – don’t use the value 1 |
R13 | |
SVC or IRQ mode, IRQs+FIQs undefined |
Exit | |
---|---|
R12 | 1 set callback |
R0-R11 | Preserved |
The This purpose handler of allows this programs call is to clear control the how escape Escape function. events are handled.
This is called whenever an escape condition is detected and the escape event is disabled (except for calls to OS_Byte 125 which always call the handler).
OS_Byte 124 and OS_Byte 126 suggest will that it is also result in the handler being called with R11 bit 6 clear to clear/acknowledge an escape condition.