easy6502
easy6502 copied to clipboard
Disassembled code will not reassemble
I attempted to plug the disassembled code back into the assembler, at which point it will not run. Below is the disassembly of snake. it is throwing an error Syntax error line 38: BEQ $0660
JSR $0606
JSR $0638
JSR $060d
JSR $062a
RTS
LDA #$02
STA $02
LDA #$04
STA $03
LDA #$11
STA $10
LDA #$10
STA $12
LDA #$0f
STA $14
LDA #$04
STA $11
STA $13
STA $15
RTS
LDA $fe
STA $00
LDA $fe
AND #$03
CLC
ADC #$02
STA $01
RTS
JSR $064d
JSR $068d
JSR $06c3
JSR $0719
JSR $0720
JSR $072d
JMP $0638
LDA $ff
CMP #$77
BEQ $0660
CMP #$64
BEQ $066b
CMP #$73
BEQ $0676
CMP #$61
BEQ $0681
RTS
LDA #$04
BIT $02
BNE $068c
LDA #$01
STA $02
RTS
LDA #$08
BIT $02
BNE $068c
LDA #$02
STA $02
RTS
LDA #$01
BIT $02
BNE $068c
LDA #$04
STA $02
RTS
LDA #$02
BIT $02
BNE $068c
LDA #$08
STA $02
RTS
RTS
JSR $0694
JSR $06a8
RTS
LDA $00
CMP $10
BNE $06a7
LDA $01
CMP $11
BNE $06a7
INC $03
INC $03
JSR $062a
RTS
LDX $02
LDA $10,X
CMP $10
BNE $06b6
LDA $11,X
CMP $11
BEQ $06bf
INX
INX
CPX $03
BEQ $06c2
JMP $06aa
JMP $0735
RTS
LDX $03
DEX
TXA
LDA $10,X
STA $12,X
DEX
BPL $06c7
LDA $02
LSR A
BCS $06dc
LSR A
BCS $06ef
LSR A
BCS $06f8
LSR A
BCS $070b
LDA $10
SEC
SBC #$20
STA $10
BCC $06e6
RTS
DEC $11
LDA #$01
CMP $11
BEQ $0716
RTS
INC $10
LDA #$1f
BIT $10
BEQ $0716
RTS
LDA $10
CLC
ADC #$20
STA $10
BCS $0702
RTS
INC $11
LDA #$06
CMP $11
BEQ $0716
RTS
DEC $10
LDA $10
AND #$1f
CMP #$1f
BEQ $0716
RTS
JMP $0735
LDY #$00
LDA $fe
STA ($00),Y
RTS
LDX $03
LDA #$00
STA ($10,X)
LDX $00
LDA #$01
STA ($10,X)
RTS
LDX $00
NOP
NOP
DEX
BNE $082f
RTS
I'm not sure, but I think what's happening is that the assembler demands that branches go to labels, not to hex addresses. Probably fixable without too much difficulty. https://github.com/skilldrick/easy6502/blob/df2b89573add05cf8fc988bd6caeadeea83883e3/simulator/assembler.js#L2155
Oops, i don't know how i messed up the title. I am currently working on a 6502 emulator, and i wanted to make sure my disassembler was working properly.