A commented disassembly of Nemesis / Gradius, Konami's RC-742 for the MSX: a 128 KB MegaROM with the Konami mapper without SCC. It reassembles into the exact ROM, byte for byte, all sixteen banks, and every one of its 131,072 bytes is accounted for.
No repository ships the game. Put your own dump in the root as nemesis.rom, 131072 bytes, sha256
3210f8a0f2309dd4b9a89fc2b24d0f178ce4393a0a1f2854fbce545c361261bcmake comprueba checks it.
make trace the flow, build the listing, reassemble it, run the tests
make verify the test that decides: reassembling has to give the ROM back
make sanity that not one byte is left unexplained, and no data reads as code
make densidad how much is commented, routine by routine, bank by bank
make reconoce measures the mapper on the bytes: Konami4, no SCC
make marca the hidden Konami mark at the end of bank 3
make web rebuild this website from the ROM and the notesA 16 KB cartridge is one listing. This one is not. Bank 0 is fixed at 0x4000-0x5FFF and the other three windows are chosen by writing the bank number to 0x6000, 0x8000 and 0xA000, so the same address means different code depending on what is mapped. tools/paginas.py fixes the one org each bank actually executes at, and everything else is done bank by bank:
src/pNN.entries — the entry points the tracer cannot deduce: the interrupt hook, the inline dispatch tables and the return addresses this cartridge pushes on the stack instead of calling. Each one has its reason next to it.src/pNN.nocode — the word tables glued right behind their call. A tracer that walks straight through them eats them as instructions.src/pNN.notes — one line per annotation: L names a routine, C comments an instruction, B a block, D a data range and F the width of a record.A D range only counts for the bank whose notes it is in: 0x6000 is the start of bank 1, of bank 4 and of bank 7.
make sanity prints the budget: 25,471 bytes of traced code and 105,601 bytes of data in named ranges, 0 unexplained, 131,072 in total. make densidad prints the comment density per bank: 12,959 instructions, 3,027 line comments, 23.4%, and not one routine below 10% out of 1,540.
Every figure on this site comes from those two commands, not from an estimate.
There is no emulator capture on this site. tools/graficos.py runs the cartridge's own routines in Python — the run-length decompressor at 0x49B9, the character loader at 0x42FC, the mirror lists, and the column builder at 0x46AE — and draws the twelve stage maps and the title screen straight from the bytes. make web regenerates them.