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Ms. Pac Attack

| 1981

Release type:
Units produced: hack
Controls/Input Device: Control(joy4way)
Number of Players: 2
More Creator:
More Coder/Software:
License from/Copyright:
SoundMix: Mono
More Graphics/Artwork:
More Music/Sound:
Acting Talent involved:
More Machine Details:
More System Details:
Game Awards Nominations:
Game Awards Won:
Title a.k.a.:
Avg. Playtime:
MAME folder name: mspacmat

Display: raster 288x224 @ 60.61Hz (60.61 pixclock)
Sound: 1 channels

Emulated in MAME via driver pacman.c:
Status: good; Emulation: good
Graphic: good; Sound: good; Color: good
Palette size: 512; Savestate: supported

5e with 4096kb
sha1:5e8b472b615f12efca3fe792410c23619f067845 crc:5c281d01
5f with 4096kb
sha1:fd6a1dde780b39aea76bf1c4befa5882573c2ef4 crc:615af909
82s123.7f with 32kb
sha1:8d0268dee78e47c712202b0ec4f1f51109b1f2a5 crc:2fc650bd
82s126.1m with 256kb
sha1:bbcec0570aeceb582ff8238a4bc8546a23430081 crc:a9cc86bf
82s126.3m with 256kb
sha1:0c4d0bee858b97632411c440bea6948a74759746 crc:77245b66
82s126.4a with 256kb
sha1:19097b5f60d1030f8b82d9f1d3a241f93e5c75d6 crc:3eb3a8e4
pacman.6e with 4096kb
sha1:e87e059c5be45753f7e9f33dff851f16d6751181 crc:c1e6ab10
pacman.6f with 4096kb
sha1:674d3a7f00d8be5e38b1fdc208ebef5a92d38329 crc:1a6fb2d4
pacman.6h with 4096kb
sha1:8e47e8c2c4d6117d174cdac150392042d3e0a881 crc:bcdd1beb
pacman.6j with 4096kb
sha1:d4a70d56bb01d27d094d73db8667ffb00ca69cb9 crc:817d94e3
u5 with 2048kb
sha1:b26cc1c8ee18e9b1daa97956d2159b954703a0ec crc:f45fbbcd
u6pacatk with 4096kb
sha1:6135b187d6b968554d08f2ac00d3a3313efb8638 crc:f6d83f4d
u7 with 4096kb
sha1:1d8ac7ad03db2dc4c8c18ade466e12032673f874 crc:c82cd714
Mameinfo.dat entry:
0.37b10 [Yochizo]


- 0.147u2: hap fixed clone Omega Fighter Special. The game fails to boot or finish post. After showing bad rom errors, the game resets.

- 0.147u1: Fixed maincpu rom loading.

- 0.122u7: Fixed gfx1/2/3/4/5 rom loading.

- 0.89u3: Changed Z80 CPU2 clock speed to 5MHz.

- 0.37b10: Yochizo added 'Omega Fighter' (UPL 1989) and clone Omega Fighter Special.

- 21st November 2000: Yochizo fixed some graphics bugs in the Omega Fighter / Atomic Robo-kid driver.

- 8th November 2000: Yochizo sent in a driver for Omega Fighter and Atomic Robo-kid.

- 25th April 1999: Dumped Omega Fighter Special.

LEVELS: 8 (restarts once)

Other Emulators:

* FB Alpha


* Raine

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Romset: 2016 kb / 8 files / 457.8 zip

Credits Mameinfo and Mametesters Project Robert J. Rabgno et al.
History.dat entry:
Ms. Pac Attack (c) 1981.

Basically this game is "Pac-Man", with a few minor differences. The major difference is that the ghosts have fewer restrictions on their movement, making them more formidable. Also adding to the challenge are the different mazes and the fact that the fruit no longer stays in one place, but moves in, out and around the maze. Fortunately there is a power pellet in each corner that (usually) turns the ghosts blue for a period of time, allowing you to eat them for points.

The main difference being the order of levels has been changed. As in the regular "Ms. Pac-Man" game, the maze turns invisible at a certain point. However, in Ms. Pac Attacks, this point is reached much earlier - at about the 144th screen instead of the 255th.


Main CPU : Zilog Z80 (@ 3.072 Mhz)
Sound Chips : Namco 3-channel WSG (@ 96 Khz)

Screen orientation : Vertical
Video resolution : 224 x 288 pixels
Screen refresh : 60.61 Hz
Palette colors : 16

Players : 2
Control : 4-way joystick
Buttons : 1


Ms. Pac Attack seems to be a hack of "Ms. Pac-Man Plus", as while the mazes are the same as Ms. Pac-Man Plus, they come out in a different order.

While the Ms. Pac-Man hacks are creative with the mazes, they have trouble dealing with other aspects of play. One problem the Ms. Pac-Man hacks have is that the fruit walks along the routes of the original mazes, making the fruit unreachable during part of its walk to and from the center. Also, the ghosts slow down at odd places during the first three racks. Such slowing down only makes sense by looking at the original mazes and seeing where the tunnels would be.

Unlike the Pac-Man hacks, the Ms. Pac-Man hacks don't mess with the scores you get from eating dots, fruit and ghosts.


Dot : 10 points
Energizer : 50 points
Ghosts : 200, 400, 800, 1600 points
Cherry : 100 points
Strawberry : 200 points
Peach : 500 points
Pretzel : 700 points
Apple : 1000 points
Pear : 2000 points
Banana : 5000 points


Edit this entry:

Licensed from Alexis Bousiges under a CC Attribution 3.0 License
cheat.dat entry:
00000000 04E14 00000006 FFFFFFFF Infinite Lives
00010000 04E15 00000005 FFFFFFFF Infinite Lives (2/2)
20A00000 11774 003CE0C3 FFFFFFFF Invincibility
20A10000 13CE0 000420A7 FFFFFFFF Invincibility (2/4) 1st = jp $3CE0, 2nd = and a/jp nz, $3CE7
20B10000 13CE3 1764C3AF FFFFFFFF Invincibility (3/4) xor a/jp $1764 (Normal Ghost)
20B10000 13CE7 1777C3AF FFFFFFFF Invincibility (4/4) xor a/jp $1777 (Blue Ghost)
20800000 1180B 00000001 FFFFFFFF Enable Speed Hack This will greatly speed up your character.
00000001 04E0E 000000F4 FFFFFFFF Finish this Level Now!
62000000 00000 00000000 00000000 Select Starting Level For the best effect deactivate this cheat after you've started the Level
00090000 04E0A 0000007E 00000068 Strawberry
00098000 04E13 00000001 00000000 Strawberry (2/2)
00090000 04E0A 0000007F 00000068 Orange
00098000 04E13 00000002 00000000 Orange (2/2)
00090000 04E0A 00000080 00000068 Pretzel
00098000 04E13 00000003 00000000 Pretzel (2/2)
00090000 04E0A 00000081 00000068 Apple
00098000 04E13 00000004 00000000 Apple (2/2)
00090000 04E0A 00000082 00000068 Pear
00098000 04E13 00000005 00000000 Pear (2/2)
00090000 04E0A 00000083 00000068 Banana
00098000 04E13 00000006 00000000 Banana (2/2)
00090000 04E0A 00000084 00000068 Multifruit 1a
00098000 04E13 00000007 00000000 Multifruit 1a (2/2)
00090000 04E0A 00000085 00000068 Multifruit 1b
00098000 04E13 00000008 00000000 Multifruit 1b (2/2)
00090000 04E0A 00000086 00000068 Multifruit 2
00098000 04E13 00000009 00000000 Multifruit 2 (2/2)
62000000 00000 00000000 00000000 Select Level (for Practice) Do NOT use in conjunction with the standard Select Starting Level cheat
00010000 04E13 00000000 FFFFFFFF Cherry
00010000 04E13 00000001 FFFFFFFF Strawberry
00010000 04E13 00000002 FFFFFFFF Orange
00010000 04E13 00000003 FFFFFFFF Pretzel
00010000 04E13 00000004 FFFFFFFF Apple
00010000 04E13 00000005 FFFFFFFF Pear
00010000 04E13 00000006 FFFFFFFF Banana
00010000 04E13 00000007 FFFFFFFF Multifruit (board 1)
00010000 04E13 00000009 FFFFFFFF Multifruit (board 2)
00010000 04E13 000000FF FFFFFFFF Split-Screen (Unplayable)
00010000 04E13 000000FE FFFFFFFF No maze or dots(Unfinishable)
62000000 00000 00000000 00000000 Select Ghost Changeback Speed
00110000 04DBD 00000000 FFFFFFFF Stay blue until eaten
00110000 04DBD 00000258 FFFFFFFF Slow
00110000 04DBD 00000168 FFFFFFFF Moderate
00110000 04DBD 000000F0 FFFFFFFF Quick
00110000 04DBD 00000078 FFFFFFFF Lightning
00110000 04DBD 00000001 FFFFFFFF No change to blue
60000000 00000 00000000 00000000 ---------------------
60000000 00000 00000000 00000000 Ghost Status Cheats
60000000 00000 00000000 00000000 ---------------------
00000000 04DA7 00000001 FFFFFFFF Red always blue
00000000 04DA8 00000001 FFFFFFFF Pink always blue
00000000 04DA9 00000001 FFFFFFFF Green always blue
00000000 04DAA 00000001 FFFFFFFF Orange always blue
00000000 04DA5 00000000 FFFFFFFF Ghosts Always Edible (No Pts)

Credit Pugsy's MAME Cheat file