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27 lines
387 B
ArmAsm
27 lines
387 B
ArmAsm
;
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; Christian Groessler, July 2004
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;
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; unsigned char get_tv(void)
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;
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; returns the TV system the machine is using
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; 0 - NTSC
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; 1 - PAL
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;
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.include "atari.inc"
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.include "get_tv.inc"
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.proc _get_tv
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ldx #TV::NTSC ; Assume NTSC
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lda PAL ; use hw register, PALNTS is only supported on XL/XE ROM
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and #$0e
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bne @NTSC
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inx ; = TV::PAL
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@NTSC: txa
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ldx #0 ; Expand to int
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rts
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.endproc
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