24 lines
513 B
Plaintext
24 lines
513 B
Plaintext
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( https://codebase64.org/doku.php?id=base:16bit_xorshift_random_generator )
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1 var, prngstate
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:asm rand
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MOV AX prngstate @+
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MOV BX AX
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RCR BX 1 #
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XOR AH BL ( high part of x ^= x << 7 )
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MOV BH AH
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RCR BH 1 # ( BH now has x >> 9 and high bit comes from low byte )
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XOR AL BH ( x ^= x >> 9 and the low part of x ^= x << 7 done )
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XOR AH AL ( x ^= x << 8 )
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MOV prngstate @+ AX
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PUSH AX
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NEXT
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:asm ticks
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XOR AX AX
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INT 0x1a #
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PUSH DX
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NEXT
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: reseed! ticks prngstate ! ;
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