Difference between revisions of "83Plus:BCALLs:4549"
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== Synopsis == | == Synopsis == | ||
| − | '''Official Name:''' | + | '''Official Name:''' ClrScrn |
'''BCALL Address:''' 4549 | '''BCALL Address:''' 4549 | ||
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== Comments == | == Comments == | ||
| − | appTextSave,(IY + appFlags) | + | set appTextSave,(IY + appFlags) if the textShadow is to be cleared also |
G-T and HORIZ split screen modes will affect how this routine maps the | G-T and HORIZ split screen modes will affect how this routine maps the | ||
coordinates specified. To avoid this turn off the split screen modes. | coordinates specified. To avoid this turn off the split screen modes. | ||
| − | grfSplit, (IY + sGrFlags) | + | set grfSplit, (IY + sGrFlags) if horizontal split mode set |
| − | vertSplit, (IY + sGrFlags) | + | set vertSplit, (IY + sGrFlags) if graph-table split mode set |
| − | grfSplitOverride, (IY + sGrFlags) | + | set grfSplitOverride, (IY + sGrFlags) to ignore split modes |
Latest revision as of 12:15, 17 April 2008
Synopsis
Official Name: ClrScrn
BCALL Address: 4549
Clears the display. If textShadow is in use clears it also.
Inputs
None
Outputs
None
Registers Destroyed
- DE,HL
Comments
set appTextSave,(IY + appFlags) if the textShadow is to be cleared also G-T and HORIZ split screen modes will affect how this routine maps the coordinates specified. To avoid this turn off the split screen modes. set grfSplit, (IY + sGrFlags) if horizontal split mode set set vertSplit, (IY + sGrFlags) if graph-table split mode set set grfSplitOverride, (IY + sGrFlags) to ignore split modes
