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23 lines
655 B
ArmAsm
23 lines
655 B
ArmAsm
;
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; 2002-11-05, Ullrich von Bassewitz
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; 2015-09-11, Greg King
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;
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; void _randomize (void);
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; /* Initialize the random number generator */
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;
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.export __randomize
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.import _srand
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.include "vic20.inc"
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__randomize:
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lda VIC_LINES ; Get overflow bit
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asl a ; Shift bit 7 into carry
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lda VIC_HLINE ; Get bit 1-8 of rasterline
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rol a ; Use bit 0-7
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tax ; Use VIC rasterline as high byte
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lda TIME+2 ; Use 60HZ clock as low byte
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jmp _srand ; Initialize generator
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