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27 lines
643 B
ArmAsm
27 lines
643 B
ArmAsm
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; 2019-09-22, Greg King
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;
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; void clrscr (void);
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; /* Clear the screen. */
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;
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.export _clrscr
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.import CHROUT
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.include "cx16.inc"
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; An internal Kernal function can't be used because it might be moved in future
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; revisions. Use an official function; but, make sure that it prints
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; to the screen.
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_clrscr:
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ldy OUT_DEV ; Save current output device
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ldx #$03 ; Screen device
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stx OUT_DEV
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lda #$93
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jsr CHROUT ; Print clear-screen character
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sty OUT_DEV ; Restore output device
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rts
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