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34 lines
798 B
ArmAsm
34 lines
798 B
ArmAsm
;
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; Ullrich von Bassewitz, 2009-09-07
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;
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; unsigned char __fastcall__ videomode (unsigned char Mode);
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; /* Set the video mode, return the old mode */
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;
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.export _videomode
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.import SWAPPER, BSOUT
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.include "c128.inc"
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.proc _videomode
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cmp MODE ; Do we have this mode already?
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beq @L9
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lda MODE ; Get current mode ...
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pha ; ... and save it
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jsr SWAPPER ; Toggle the mode
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lda #14
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jsr BSOUT ; Switch to lower case chars
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pla ; Get old mode into A
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; Done, old mode is in A
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@L9: ldx #$00 ; Clear high byte
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rts
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.endproc
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