Difference between revisions of "83Plus:BCALLs:4021"
From WikiTI
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=== Registers Destroyed === | === Registers Destroyed === | ||
| − | * | + | * Doesn't matter because it doesn't return |
== Comments == | == Comments == | ||
Revision as of 07:47, 6 February 2008
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Synopsis
Official Name: MonForceKey
BCALL Address: 4021
Calls the system monitor but allows the programmer to push an initial key through cxMain. This is very much like Mon.
Inputs
- a = initial key press to simulate
- AppAllowContext, (IY + APIFlg) = 1 to allow Mon to pass context keys, like
- kYequ to the cxMain routine.
- CurLock, (IY + curFlags) = 1 to lock the cursor off
Outputs
- none
Registers Destroyed
- Doesn't matter because it doesn't return
Comments
The system NEVER returns from this B_CALL. The programmer should find alternative methods of regaining control and exiting such as hooks, cxMain, etc.
Example
To simulate a key press by the user when first entering the system monitor:
;set up edit buffer ;... ld a,k8 B_CALL MonForceKey ;should see the number 8 appear in the edit buffer
