Hi this is a cheap gameboy disassembler designed to produce assembly code which can immediatebly be reassembled with wla-gb (my fav gb disassembler, yeahyeah).
Currently doesn't necessarily reassemble ROM headers properly. Workaround: edit gbdisasm and set HEADER_DIRECTIVES=false
Tested with tetris.gb and harvestmoongb.gbc, woohoo
Do this to disassemble tetris:
./gbdisasm tetris.gb > tetris.asm
And (if you have wla-gb) do this to reassemble it real quick for test:
echo "[objects]\ntetris.o" > link && wla-gb -o tetris.o tetris.asm && wlalink link tetris_again.gb && rm link && rm tetris.o
Check and see that it reassembled unaltered if you like (it should say nothing):
diff tetris.gb tetris_again.gb
python3 is needed to generate the instruction parsing code, and gcc is all I've tried compiling it with.
Just running make should build everything, yeah. (But I don't know how to write make files properly so if you're gonna use a different C compiler you gotta edit that.)
gbdisasm this is the program you wanna use. It's a shell script that takes a rom file and spits out a complete disassembled assembly file ready to reassembled with wla-gb.
gbdis is the actual disassembler. It takes in bytes from stdin and spits out mnemonics.
gbinfo is a utility to extract header information from rom files.
gen_instruction_parser.py generates instruction parsing code from mnemonics.txt (taken from wla-gb)
gen_test.py just spits out a bin file including every instruction, for testing purposes of course. :p