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28 lines
491 B
ArmAsm
28 lines
491 B
ArmAsm
;
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; Written by Groepaz <groepaz@gmx.net>
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;
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; void waitvsync (void);
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;
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.export _waitvsync
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.include "vic20.inc"
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; FIXME
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; this flag doesnt work on vic20!!!
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; it will have to be filled by a get_tv() constructor or so
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PALFLAG = $2A6 ; $01 = PAL, $00 = NTSC
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_waitvsync:
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lda PALFLAG
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beq @ntsc
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ldx #(312-8)/2
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.byte $2c
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@ntsc:
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ldx #(262-8)/2
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@l2:
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cpx VIC_HLINE
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bcs @l2
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rts
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