Ms. Pac-Man & Galaga: 20 Year Reunion
|Ms. Pac-Man & Galaga: 20 Year Reunion|
Also known as: Ms. Pac-Man & Galaga: 20th Anniversary Class of 1981 Reunion
This game has a bugs page
Notably caused a lawsuit from General Computer Corporation, the creators of Ms. Pac-Man, as they hadn't been paid royalities (which Namco had promised them for each coin-operated system manufactured featuring the game in a contract from 1983).
These are found in all revisions.
The message from Ms. Pac-Man is still present at 0x97D0.
Found at 0xC020 (linebreaks have been added):
PACMAN (c) 1980, namco. MS PACMAN (c) 1981, namco. GALAGA (c) 1981, namco. kernel (c) 2000 cosmodog, ltd. http://www.cosmodog.com
Development Tool Leftovers
The game writes this text to the Z180 ASCI port and listens for incoming commands. The text can be found at 0xF866:
MS PAC-MAN/GALAGA arcade video system version 1.01 (c) 2000 Cosmodog, Ltd. >
Found in revisions later than 1.02 at 0xC7C5 is a list (and descriptions) of possible commands:
d w f d' w' f' de ee we reset in irq di ei dip pac mspac gal test gamesel state boom step run out enter "? cmd" for help on a specific command. available commands: ?, d, w, f, d', w', f', de, ee, we, reset, in, irq, di, ei, dip, pac, mspac, gal, test, gamesel, state, boom, step, run d [start [end]] -- dump memory. if no start address is given dump from one byte past last dump. if no end address is given dump one page (256 bytes) w addr val1 [val2 [val3 [val4 ...]]] -- write bytes starting at addr f start end fill -- fill range from start to end with pattern fill d [start [end]] -- dump second memory w addr val1 [val2 [val3 [val4 ...]]] -- write bytes to second memory f start end fill -- fill range in second memory de -- dump entire eeprom ee [addr] -- erase eeprom word at addr. if no address given erase device. we addr val -- write eeprom word val at address addr. reset - reset the system in - show the state of the inputs irq - clear vblank interrupt di - disable vblank interrupts ei - enable vblank interrupts dip - show state of DIP switches pac - run Pac Man mspac - run Ms Pac Man gal - run Galaga test - run test mode gamesel state - set the game select bit (0 = pacman/ms. pac, 1 = galaga) state - dump some useful details about the game state boom - make a noise step [frames] - step game this many frames (default = 1) run - allow game to run endlessly (no freeze) out port val - write a value to an i/o port
Insert a credit, then press Up (×3), Down (×3), Left, Right, Left, Right, Left. If done correctly, a sound effect will play and Blinky (the red ghost) will turn blue. Now press Start on Ms. Pac-Man and you will boot into Pac-Man.
The Galaxian series
|Arcade||Galaxian • Galaga • Gaplus • Galaxian 3: Project Dragoon|
Ms. Pac-Man & Galaga: 20 Year Reunion • Pac-Man: 25th Anniversary Edition
|Atari 5200, Atari 8-bit family||Galaxian|
|NES||Galaxian • Galaga • Gaplus|
|PlayStation||Galaxian 3 • Galaga: Destination Earth|
|Plug & Play||Galaga|