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- ; brainfuck64-small v1.0 BY nINJA/tHE dREAMS IN 2001
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- ; SMALLER VERSION IS EXTREMLY SHORT, INPUT FILE HAS TO
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- ; BE OPENED AND CLOSED IN basic
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- INCLUDE STANDARD.C64
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- SRC_PNT = $7A
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- ARR_PNT = $37
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- FILL_PNT = $2B
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- W_CNT = $33
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- CHRGET = $0073
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- ORG $CF08
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- JSR $A68E
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- LDX $B8
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- JSR $FFC6
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- GET_INP:
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- JSR $FFE4
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- JSR $E419
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- BVC GET_INP
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- DEC $01
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- LSR ARR_PNT+1
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- LDX #$CD
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- CLMEM:
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- JSR $E418
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- CPX FILL_PNT+1
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- BNE CLMEM
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- MAINLOOP:
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- JSR CHRGET
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- TAX
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- BEQ EXIT
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- LDA (ARR_PNT),Y
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- CPY W_CNT
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- BNE NO_PKT
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- CPX #'+'
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- BEQ BEF_PL
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- CPX #'-'
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- BEQ BEF_MI
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- CPX #','
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- BNE NO_KOM
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- JSR $F15B
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- STY $D0
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- BYT $2C
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- BEF_MI:
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- SBC #1
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- BYT $2C
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- BEF_PL:
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- ADC #1-1
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- STA (ARR_PNT),Y
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- NO_KOM:
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- CPX #'>'
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- BNE NO_GR
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- INC ARR_PNT
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- BNE *+4
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- INC ARR_PNT+1
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- NO_GR:
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- CPX #'<'
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- BNE NO_KL
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- LDA ARR_PNT
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- BNE *+4
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- DEC ARR_PNT+1
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- DEC ARR_PNT
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- NO_KL:
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- CPX #'.'
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- BNE NO_PKT
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- JSR $FFD2
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- NO_PKT:
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- CPX #'['
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- BEQ BEF_AUF
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- NO_AUF:
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- CPX #']'
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- BNE MAINLOOP
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- DEC W_CNT
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- BPL MAINLOOP
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- STY W_CNT
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- PLA
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- STA SRC_PNT+1
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- PLA
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- STA SRC_PNT
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- BEF_AUF:
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- LAX (ARR_PNT),Y ; ILLEGAL
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- BEQ SKIP
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- LDA SRC_PNT
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- PHA
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- LDA SRC_PNT+1
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- PHA
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- BYT $2C
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- SKIP:
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- INC W_CNT
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- BCS MAINLOOP
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- EXIT:
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- INC $01
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- JMP $E3BF
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- END $CF08
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