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mtrap: MAME ROM Information.


Mousetrap (c) 1981 Exidy.

Control a mouse around the maze to collect cheese while avoiding cats. Collecting a bone will turn you into a dog in which you can eat the cats. Collect all the cheese to clear the maze. But beware of the hawk who flies over periodically, the mouse and the dog are vulnerable to it. You can also press certain coloured buttons to alter the maze.


Main CPU : M6502 (@ 705.562 Khz)

Sound CPU : M6502 (@ 894.886 Khz), Z80 (@ 1.789772 Mhz)

Sound Chips : Custom (@ 1.789772 Mhz), HC55516 (@ 1.789772 Mhz)

Screen orientation : Horizontal

Video resolution : 256 x 256 pixels

Screen refresh : 57.00 Hz

Palette colors : 8

Players : 1

Control : 4-way joystick

Buttons : 4



Released in December 1981.

Mousetrap inspired a catchy hit song by Buckner and Garcia called 'Mousetrap' released on the 'Pac-Man Fever' album.


Designed and programmed by : Larry W. Hutcherson


* Consoles :

Colecovision (1982)

Atari 2600 (1982)

Mattel Intellivision (1982)


Game's rom.

Machine's picture.

MAME Info:

0.18 [Marc Lafontaine]

Artwork available


- Press 6 + F3 to enter service mode.


- [possible] Missing noise playing in the background during the boot-up test and throughout the game. Darkk (ID 01157)


- 0.140: Aaron Giles fixed crash/assert after OK in Mouse Trap.

- 0.131u2: Fabio Priuli fixed sound effects cycle in Mouse Trap.

- 0.129: MooglyGuy added savestate support to Mouse Trap and clones.

- 0.122u7: Zsolt Vasvari added the ability to the HC55516 emulator to take an external osciallator. Updated Mouse Trap to use the new interface. Added MC3417 and MC3418 variants to the HC55516 sound emulation. Replaced HC55516 sound with MC3417 (15469 Hz).

- 0.122u4: Zsolt Vasvari fixed hawk displaying (mtrap37b14gre).

- 0.117u3: Aaron Giles fixed samples playing speed.

- 24th December 2006: Mr. Do - Thanks to the loan by Vintage Arcade Superstore and top-of-the-line restoration by Addy, we have Mouse Trap bezel.

- 0.37b5: Removed Samples sound.

- 0.36b8: CVSD sound in Mouse Trap [Dan Boris, Aaron Giles]. Added Z80 (1789772 Hz) CPU3 and HC55516 sound and cpu3 roms ($0, 1000, 2000, 3000).

- 31st July 1999: Dan Boris added sound to Mouse Trap, but it doesn't work right.

- 0.35b13: Eric Hustvedt added clones Mouse Trap (version 3) and (version 4). Changed parent description to 'Mouse Trap (version 5)'.

- 2nd May 1999: Valerio Verrando updated the Mouse Trap driver with two clones added.

- 2nd March 1999: Eric Hustvedt has added another Mouse Trap clone.

- 28th February 1999: Eric Hustvedt added another Mouse Trap clone.

- 0.35b2: Added Samples and Custom sound.

- 0.31: Mike Balfour added accurate colors to Mouse Trap.

- 0.28: Mike Balfour did some fixes to the Exidy games (Venture, Mouse Trap, Pepper II). Collision detection is now supported, Venture is playable.

- 0.18: Marc Lafontaine added Mouse Trap (Exidy 1981) to the Venture driver. Runs on the same hardware as Venture. Collision detection doesn't work - in Mouse Trap, you can use keys 7 and 8 to simulate a sprite-to-character and a sprite-to-sprite collision. Game is partially playable with wrong colors and no sound. Control: Arrows = Move around, CTRL = Fire and 3+F3 = Test mode.

Recommended Games (Cat & Mouse):

Cheeky Mouse

Frisky Tom

Mouse Trap

Naughty Mouse



Cat and Mouse


Macho Mouse

Pop Flamer

Super Mouse



Namco Classic Collection Vol.1 (Mappy)

Hopping Mappy


Uncle Poo


Peter Pack-Rat

Chip'n Dale: Rescue Rangers (PlayChoice-10)

Rockin' Kats (PlayChoice-10)

ChuckECheese's Match Game

Double Cheese

Magical Cat Adventure

Cheese Chase

Super Trio

Bang Bang Ball

Mouse Attack

Hammer (Mouse)

Recommended Games (Maze):

Amazing Maze

Crush Roller

The Hand

Lady Bug


Lock'n'Chase (DECO Cassette)

Maze Invaders

Mouse Trap




Ali Baba and 40 Thieves

Blue Print

Check Man




Hard Hat



Tylz (prototype)




Lover Boy

Marvin's Maze


New Sinbad 7

Rootin' Tootin'

Sindbad Mystery

Swinging Singles


The Berenstain Bears in Big Paw's Cave

Jack Rabbit


The Three Stooges In Brides Is Brides

Vs. Clu Clu Land

I'm Sorry

Merlins Money Maze

Opa Opa

Klad / Labyrinth



Touche Me

Sel Feena

Tinkle Pit

Twin Brats


Romset: 48 kb / 14 files / 32.1 zip

MAME XML Output:

       <game name="mtrap" sourcefile="exidy.c">
              <description>Mouse Trap (version 5)</description>
              <rom name="mtl11a.bin" size="4096" crc="bd6c3eb5" sha1="248956374222a09caa5b8c8fa842e9286d8e1c5d" region="maincpu" offset="a000"/>
              <rom name="mtl10a.bin" size="4096" crc="75b0593e" sha1="48ce5382905f7c52929a95267d65fd0d3f0dcc92" region="maincpu" offset="b000"/>
              <rom name="mtl9a.bin" size="4096" crc="28dd20ff" sha1="8ac44ec27ac25209c8b49da4c6b423917ed8907e" region="maincpu" offset="c000"/>
              <rom name="mtl8a.bin" size="4096" crc="cc09f7a4" sha1="e806dc0e10b909b61e347f3e28eb024f3b3a9702" region="maincpu" offset="d000"/>
              <rom name="mtl7a.bin" size="4096" crc="caafbb6d" sha1="96823ac4e49f192121c53f70382a20f7c52e290b" region="maincpu" offset="e000"/>
              <rom name="mtl6a.bin" size="4096" crc="d85e52ca" sha1="51296247e365a468fe9458b722bbdbbeeed59fa0" region="maincpu" offset="f000"/>
              <rom name="mta5a.bin" size="2048" crc="dbe4ec02" sha1="34e965428dbb4b9c558927bb80d19cb550b53228" region="audiocpu" offset="6800"/>
              <rom name="mta6a.bin" size="2048" crc="c00f0c05" sha1="398b0bc2a7e54b1e2326ed067bf6bb15cc52ed39" region="audiocpu" offset="7000"/>
              <rom name="mta7a.bin" size="2048" crc="f3f16ca7" sha1="3928c5da246c43036a7b4cbb140a1734d5f1fb03" region="audiocpu" offset="7800"/>
              <rom name="mta2a.bin" size="4096" crc="13db8ed3" sha1="939352323bdcd7df25db5eb2e30f269bcaebe6af" region="cvsdcpu" offset="0"/>
              <rom name="mta3a.bin" size="4096" crc="31bdfe5c" sha1="b10bfe9e56dd617c5b4cd8b5bfec9c7f537b1086" region="cvsdcpu" offset="1000"/>
              <rom name="mta4a.bin" size="4096" crc="1502d0e8" sha1="8ef51ad4601299016f1821a5c65bec0199dd5474" region="cvsdcpu" offset="2000"/>
              <rom name="mta1a.bin" size="4096" crc="658482a6" sha1="c0d770fbeaa7cb3e0eef47d8caa0f8a78841692e" region="cvsdcpu" offset="3000"/>
              <rom name="mtl11d.bin" size="2048" crc="c6e4d339" sha1="b091923e4d52e93d7c567afba217a10b2a3735fc" region="gfx1" offset="0"/>
              <chip type="cpu" tag="maincpu" name="M6502" clock="705562"/>
              <chip type="cpu" tag="audiocpu" name="M6502" clock="894886"/>
              <chip type="cpu" tag="cvsdcpu" name="Z80" clock="1789772"/>
              <chip type="audio" tag="mono" name="Speaker"/>
              <chip type="audio" tag="custom" name="Exidy SFX+PSG"/>
              <chip type="audio" tag="cvsd" name="MC3417" clock="15469"/>
              <display tag="screen" type="raster" rotate="0" width="256" height="256" refresh="59.996811" pixclock="5644500" htotal="336" hbend="0" hbstart="256" vtotal="280" vbend="0" vbstart="256" />
              <sound channels="1"/>
              <input players="1" buttons="4" coins="2">
                     <control type="joy" ways="4"/>
              <dipswitch name="Bonus Life" tag="DSW" mask="6">
                     <dipvalue name="30000" value="6" default="yes"/>
                     <dipvalue name="40000" value="4"/>
                     <dipvalue name="50000" value="2"/>
                     <dipvalue name="60000" value="0"/>
              <dipswitch name="Lives" tag="DSW" mask="96">
                     <dipvalue name="2" value="96"/>
                     <dipvalue name="3" value="64" default="yes"/>
                     <dipvalue name="4" value="32"/>
                     <dipvalue name="5" value="0"/>
              <dipswitch name="Coinage" tag="DSW" mask="152">
                     <dipvalue name="2 Coins/1 Credit" value="144"/>
                     <dipvalue name="Coin A 2C/1C Coin B 1C/3C" value="0"/>
                     <dipvalue name="1 Coin/1 Credit" value="152" default="yes"/>
                     <dipvalue name="Coin A 1C/1C Coin B 1C/4C" value="16"/>
                     <dipvalue name="Coin A 1C/1C Coin B 1C/5C" value="24"/>
                     <dipvalue name="1 Coin/2 Credits" value="136"/>
                     <dipvalue name="Coin A 1C/3C Coin B 2C/7C" value="8"/>
                     <dipvalue name="1 Coin/4 Credits" value="128"/>
              <dipswitch name="Free Play" tag="IN2" mask="4">
                     <dipvalue name="Off" value="4" default="yes"/>
                     <dipvalue name="On" value="0"/>
              <driver status="good" emulation="good" color="good" sound="good" graphic="good" savestate="supported" palettesize="8"/>

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