The avatar for @maddievision
maddie lim ✨
aka DJ Bouche
Published
Low Level Stuff
Edited
Oct 9, 2022
Importers
1 star
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SPC = ({
createState: () => stateView(createState()),

// direct reads
memSlice,
read,
read16,
reg,

// "branch" instructions return true in the case where a branch would happen
beq,
bne,
bpl,
bmi,
bcc,
bcs,

...mutateWrapped
})
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mutateFuncs = ({
// direct writes
write,
write16,

// carry
clc,
sec,

// shifts
asl,
lsr,

rol,
ror,

rolAddr,
rorAddr,

// arithmetic
inc,
inx,
iny,

dec,
dex,
dey,

adc,
addw,

sbc,

mul,
div,

// register transfers
tax,
txa,
tay,
tya,

// mem transfers
lda,
ldaAddr,
ldaAddrX,

ldx,
ldxAddr,

ldy,
ldyAddr,

ldyaAddr,

staAddr,
stxAddr,
styAddr,

styaAddr,

// compare
cmp,
cpx,
cpy,

// loop
bloop
})
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SPC.memSlice(s9, 0x20, 0x20)
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s0 = SPC.createState()
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s1 = SPC.lda(s0, 0x15)
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s2 = SPC.cmp(s1, 0x15)
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SPC.beq(s2)
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s3 = SPC.cmp(s2, 0x12)
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SPC.bcs(s3)
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s4 = SPC.bloop(
s3,
(s) => {
s = SPC.iny(s);
return SPC.dec(s);
},
SPC.bpl
)
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SPC.bmi(s4)
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s5 = SPC.cpy(s4, 0x16)
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SPC.beq(s5)
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s6 = SPC.lda(s5, 0x13)
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s7 = SPC.sec(s6)
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s8 = SPC.sbc(s7, 0x10)
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s9 = SPC.cmp(s8, 0x3)
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SPC.beq(s9)
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