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cc65/libsrc/geos/conio/screensize.s

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;
; Maciej 'YTM/Elysium' Witkowiak
;
; 27.10.2001
; 06.03.2002
; void screensize (unsigned char* x, unsigned char* y);
;
.export _screensize
.import popax
.importzp ptr1, ptr2
.import xsize, ysize
.include "../inc/geossym.inc"
_screensize:
sta ptr1 ; Store the y pointer
stx ptr1+1
jsr popax ; get the x pointer
sta ptr2
stx ptr2+1
lda xsize
sta (ptr2),y
lda ysize
sta (ptr1),y
rts