dis - Statically Tracing 6502 Disassembler
dis creates XASM/MADS-compatible assembly code from a memory dump or an executable. dis statically traces execution paths starting from code entry points to mark which memory locations contain code. All other memory is treated as data. dis traces through JMP, JSR and BXX branch instructions. It stops at RTS, RTI and illegal instructions.
dis automatically determines code entry points when disassembling Atari XEX/SAP files and Commodore 64 PRG files.
Usage
Usage: dis [options] file...
-c L=XXXX Code entry point(s)
-d L=XXXX Data location(s) - Disallow tracing as code
-C L=XXXX Constant value(s)
-v L=XXXX Vector(s), e.g. FFFA
-o L=XXXX Origin for raw files
-l Create labels
-i Emit illegal opcodes
-t TYPE Dissasseble as TYPE
xex - Atari executable (-x)
sap - Atari SAP file
prg - Commodore 64 executable (-p)
raw - raw memory
-comment Emit comments
-call Emit callers
-access Emit accessors
-extern Emit labels for out-of-range addresses
-rangelabels Emit labels for ranges instead of base+offset
-verbose Print info to STDERR
-dump Print options in format for -a
-a FILE Read options from FILE. Lines are: OPTION VALUE
Addresses may include a range, e.g. table=$300+F
Addresses may include xex segment number, e.g. 3:1FAE
Examples
Disassemble as pure data:
dis data.mem > data.asm
Disassemble 64K memory dump. Trace code starting at hex $1000:
dis -e 1000 game.mem > game.asm
Disassamble 64K memory dump. Trace code starting at $1000 and $9006. Trace code that is vectored from $FFFE. Mark $9101 as data, e.g. data after an always-taken branch:
dis -e 1000 -e 9006 -v FFFE -d 9101 game.mem > game.asm
Disassemble partial memory dump as if it started at $1000:
dis -o 1000 -e 1000 game.mem > game.asm
Disassemble Atari XEX file with segment-specific user-defined labels:
dis -x -l -c intro=1:2000 -c game=3:2000 game.xex > game.asm
Disassemble Commodore 64 PRG file with labels and an additional entry point:
dis -p -l -e 1000 game.prg > game.asm
Disassemble Atari SAP file with option files:
dis -t sap -l -a hardware.dop -a sys.dop A_Type.sap > A_Type.asm
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