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cc65/libsrc/conio/scrsize.s

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;
; Ullrich von Bassewitz, 08.08.1998
;
; void screensize (unsigned char* x, unsigned char* y);
;
.export _screensize
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.import popptr1
.import screensize
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.importzp ptr1, ptr2
.macpack cpu
.proc _screensize
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sta ptr2 ; Store the y pointer
stx ptr2+1
jsr popptr1 ; Get the x pointer into ptr1
jsr screensize ; Get screensize into X/Y
tya ; Get Y size into A
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.if (.cpu .bitand ::CPU_ISET_65SC02)
sta (ptr2)
txa
sta (ptr1)
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.else
ldy #0
sta (ptr2),y
txa
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sta (ptr1),y
.endif
rts
.endproc