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View Code? Open in Web Editor NEWTest a Z80 8 bits Pseudo-Random Number Generator
Test a Z80 8 bits Pseudo-Random Number Generator
char Random(char mask) __naked
{
mask;
__asm
push IX
ld IX,#0
add IX,SP
ld C,4(ix) ;recoge la mascara
ld A,(_SEED) ;empezamos recogiendo la semilla
ld E,A
ld A,R
and #0x0F ; <--- probar con 0x07 ###########################################
ld B,A
RNDbuc:
add A,A
djnz RNDbuc
add A,E
ld B,A
ld A,R
add A,B ;suma el valor de R a la semilla
rlca
ld (_SEED),A ;guarda la semilla
and C ;aplica la mascara
ld L,A ;return L
pop IX
ret
__endasm;
}
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