1992 · Ocean Software
Every byte of the C64's 64 KB, one pixel each, 512 to a row. Lit pixels are what this game is: its code, graphics, level data, sound, text, tables and variables, exactly where they sit in memory. Dim areas are screen and working memory; dark is unused.
This game is in 3 parts, and the map is of one of them: The title screen and character select. The Source tab has the listing of each part that has one.
| Tier | bronze |
|---|---|
| Coverage | 100 % of the bytes the game uses have a description |
| Comments checked | Not measured. No sample of the listing’s comments has been checked. How listings are checked |
| Build analysed | PAL disk release in a G64 image whose title program is the file LOADER (no file TITLE, which the game-over code asks for); three parts: the title and character select, the game at stage 1A played as Riggs, and the ending |
| Copy | agent-draft |
| Tools | host: macOS 27.0 on an Apple M4 (arm64), emulator: release v3.14.0, v3.14.0-macos-arm64-gui.dmg (tools/vice-mcp); driven through kit/c64/vice.py; check-emulator 57 of 57, disassembler: regenerator2000 0.9.20, publication: Python 3 and Node.js; symbols_export.py, listing.py; work/scripts/unpack.js runs the game's unpacker on the kit's 6502 for the Maps tab |
| Model | claude-opus-5-5 |
| Kit version | 0.0.280 |
Every step that measured the Source tab’s comments or made them more accurate, in the order it happened, with the models that did it. Accuracy of the Source explains each step and what the row above makes of them.
| Step | By | What it found | Of the listing |
|---|---|---|---|
| Research | claude-opus-5-5 | Looked the game up online (its manual, reviews or wiki pages) before reading its code. | |
| Annotation | claude-opus-5-5 | Wrote the listing’s comments. 100 % of the program is described, in 1,507 comments. | |
| Port check | claude-opus-5-5 | Checked a page’s port or widget against the game and corrected 1 comment it showed wrong. the music player: the page's driver held against the title's listing, which showed 64 bytes of the frequency tables missing from it |
likely wrong the sample’s range corrected right, or likely right not yet measured
Read this before annotating code. What the game is documented to do, with verification status against the binary. Statuses: open (documented, not found yet), traced (in the code, could not be exercised; say what was tried), confirmed (in the code, consistent with the emulator), live (observed directly), differs (the code does something else). "Absent" is not a status.
Sources:
| Feature | Status | Where |
|---|---|---|
| Choose Riggs or Murtaugh at the start | live | $C34C, $FFF1 |
| Linear stages, no choice of mission | confirmed | exits in each overlay, $22CB, $2388 |
| Side-scrolling platform play | live | eight-way scroll, $14E1 |
| Guns | live | $1DB3, $1EB1, $1F37 |
| Grenades | open | no grenade throw found for the player; searched the joystick actions ($2813, $2502) and the fire code |
| Punching | open | not found in the player's controls; searched the same |
| Riggs fires faster, Murtaugh jumps higher (other versions) | differs | both fire the same way; same jump height, Riggs slower ($36A0, $36E2) |
| Music by Mark Cooksey: Game Theme and Game Over | confirmed | MUSI, three tunes ($E8C1); which is "Game Over" is open |
| Time limit | live | $F424 |
| Energy, lives, continues | confirmed | $F373, $373C, $2865 |
$F47A).$E12F).$0766).Each part of the game has its own symbol map and listing: The title screen and character select, symbols.json and listing.json; The game, symbols.json and listing.json; The ending, symbols.json and listing.json. Write-ups, facts and symbol maps are CC BY-SA 4.0. The game itself is not hosted here.