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cc65/libsrc/tgi/tgi_setcolor.s
2020-06-04 12:58:05 -04:00

23 lines
568 B
ArmAsm

;
; 2002-06-21, Ullrich von Bassewitz
; 2020-06-04, Greg King
;
; void __fastcall__ tgi_setcolor (unsigned char color);
; /* Set the current drawing color */
.include "tgi-kernel.inc"
.proc _tgi_setcolor
cmp _tgi_colorcount ; Compare to available colors
bcs @L1
@L0: sta _tgi_color ; Remember the drawing color
jmp tgi_setcolor ; Call the driver
@L1: ldx _tgi_colorcount
beq @L0 ; Zero means 256 colors
jmp tgi_inv_arg ; Invalid argument
.endproc