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cc65/libsrc/plus4/get_tv.s

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;
; Ullrich von Bassewitz, 2002-12-03
;
; unsigned char __fastcall__ get_tv (void);
; /* Return the video mode the machine is using */
;
.export _get_tv
.include "plus4.inc"
;--------------------------------------------------------------------------
; _get_tv
.proc _get_tv
ldx #$01 ; Assume PAL
bit TED_MULTI1 ; Test bit 6
bvc pal
dex ; NTSC
pal: txa
ldx #0
rts
.endproc