This project is primarily created to supply a reusable Java disassembler for the AppleCommander project.
$ acdasm --help
Usage: acdasm [-hV] [--[no-]labels] [-a=<startAddress>] [--6502S | --SWEET16 |
--6502X | --65C02 | --6502] <file>
AC Disassembler.
<file> File to disassemble.
Options:
-a, --addr, --origin=<startAddress>
Set start address for application.
-h, --help Show this help message and exit.
--[no-]labels Show/Hide labels.
-V, --version Print version information and exit.
CPU Selection:
--6502 MOS 6502.
--6502S MOS 6502 with SWEET16 switching.
--6502X MOS 6502 + 'illegal' instructions.
--65C02 WDC 65C02.
--SWEET16 SWEET16.
Sample runs:
$ acdasm --6502 -a 0x220 COPY.OBJ1.bin
0220- 88 L0220 DEY
0221- B0 02 BCS L0225
0223- A0 B7 LDY #$B7
0225- A9 89 L0225 LDA #$89
0227- 20 80 02 JSR L0280
...
The 6502/SWEET16 switching mode will switch to SWEET16 mode if a JSR $F689 occurs in code and switch back to 6502 mode when a SWEET16 RTN instruction is encountered:
$ acdasm -a 0x800 --6502S renumber.bin
0800- 20 89 F6 JSR $F689
0803- .SWEET16
0803- 11 CA 00 SET R1,#$00CA
0806- 61 LDD @R1
0807- 31 ST R1
0808- 12 0A 00 SET R2,#$000A
080B- 13 4C 00 SET R3,#$004C
080E- 63 LDD @R3
080F- 33 ST R3
0810- 14 DE 03 SET R4,#$03DE
0813- 21 L0813 LD R1
0814- D3 CPR R3
0815- 03 0E L0825 BC $0825
0817- 41 LD @R1
0818- 35 ST R5
0819- 24 LD R4
081A- A2 ADD R2
081B- 34 ST R4
081C- 71 STD @R1
081D- F1 DCR R1
081E- F1 DCR R1
081F- F1 DCR R1
0820- 21 LD R1
0821- A5 ADD R5
0822- 31 ST R1
0823- 01 EE L0813 BR $0813
0825- 00 L0825 RTN
0826- .6502
0826- 60 RTS
Labels can also be toggled off:
$ acdasm --SWEET16 --no-labels sw16.sample2.bin
0300- 11 00 0A SET R1,#$0A00
0303- 12 80 0A SET R2,#$0A80
0306- 13 23 00 SET R3,#$0023
0309- 41 LD @R1
030A- 52 ST @R2
030B- F3 DCR R3
030C- 07 FB BNZ $0309
030E- 00 RTN