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43 lines
654 B
Plaintext
43 lines
654 B
Plaintext
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import random
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#if not(ARCH_6502)
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#warn random_6502 module should be only used on 6502-compatible targets
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#endif
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asm byte rand() {
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? ldx #8
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? lda rand_seed+0
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__rand_loop:
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asl
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? rol rand_seed+1
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bcc __no_eor
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eor #$2D
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__no_eor:
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dex
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bne __rand_loop
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? sta rand_seed+0
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? rts
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}
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#if CBM_64
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void init_rand_seed() {
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poke($D40E, $ff)
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poke($D40F, $ff)
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poke($D412, $80)
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while vic_raster != $70 {}
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rand_seed.hi = peek($D41B)
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while vic_raster != $40 {}
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rand_seed.lo = peek($D41B)
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}
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#else
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inline void init_rand_seed() {
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// TODO: find a better source of randomness
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rand_seed = 1
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}
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#endif |