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cc65/libsrc/c64/color.s

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;
; Ullrich von Bassewitz, 06.08.1998
;
; unsigned char __fastcall__ textcolor (unsigned char color);
; unsigned char __fastcall__ bgcolor (unsigned char color);
;
.export _textcolor, _bgcolor
.include "c64.inc"
_textcolor:
ldx CHARCOLOR ; get old value
sta CHARCOLOR ; set new value
txa
rts
_bgcolor:
ldx VIC_BG_COLOR0 ; get old value
sta VIC_BG_COLOR0 ; set new value
txa
rts