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cbdash: MAME ROM Information.


Boulder Dash (c) 1985 Data East.

Rockford digs feverishly, as boulders crash down all around him, throughout 16 mystical caves and five levels of difficulty.


DECO Cassette System hardware

[Cassette No.44]

Main CPU : M6502 (@ 750 Khz), M6502 (@ 500 Khz), I8X41 (@ 500 Khz)

Sound Chips : (2x) AY8910 (@ 1.5 Mhz)

Screen orientation : Vertical

Video resolution : 240 x 240 pixels

Screen refresh : 57.00 Hz

Palette colors : 32

Players : 2

Control : stick

Buttons : 2


Released in August 1985.


Designed and programmed by : Peter Liepa, Chris Gray


Game's rom.

Machine's picture.

MAME Info:

0.37b13 [Juergen Buchmueller, Al Kossow]

Artwork available


- 0.145u1: Changed description to 'Boulder Dash (DECO Cassette)'.

- 0.133u1: Added dipswitches 'Type of Tape', 'Lives', 'Bonus Life', 'Difficulty' and 'Country Code'.

- 0.88u2: Changed description to 'Boulder Dash (Cassette)'.

- 0.37b13: Juergen Buchmueller added 'Cassette: Boulder Dash' (DECO 1985).

- 14th February 2001: Juergen Buchmueller improved the sound CPU communication in the DECO Cassette system driver and added Boulder Dash - the original version.

LEVELS: 16 (endless)

Recommended Games (Maze Digging):


Robby Roto

Dig Dug

Namco Classic Collection Vol.2 (Dig Dug)

Tenkomori Shooting (Dig Dug)

Dig Dug II

Zig Zag

Digger (CVS)

Gold Bug

Mr. Do!

Neo Mr. Do!

The Pit


Boulder Dash

Boulder Dash (DECO Cassette)

Boulder Dash (Max-A-Flex)


Calorie Kun vs Moguranian

Diamond Run

Dangerous Dungeons


Super Toffy

Mr Driller

Mr Driller 2

Mr. Driller G

Mr. Dig

Digger Man (prototype)

Romset: 32 kb / 1 files / 13.0 zip

MAME XML Output:

       <game name="cbdash" sourcefile="decocass.c" romof="decocass">
              <description>Boulder Dash (DECO Cassette)</description>
              <manufacturer>Data East Corporation</manufacturer>
              <rom name="v0b-.7e" merge="v0b-.7e" size="4096" crc="23d929b7" sha1="063f83020ba3d6f43ab8471f95ca919767b93aa4" region="maincpu" offset="f000"/>
              <rom name="v1-.5a" merge="v1-.5a" size="2048" crc="b66b2c2a" sha1="0097f38beb4872e735e560148052e258a26b08fd" region="audiocpu" offset="f800"/>
              <rom name="cassmcu.1c" merge="cassmcu.1c" size="1024" crc="a6df18fd" sha1="1f9ea47e372d31767c936c15852b43df2b0ee8ff" region="mcu" offset="0"/>
              <rom name="v2.3m" merge="v2.3m" size="32" crc="238fdb40" sha1="b88e8fabb82092105c3828154608ea067acbf2e5" region="proms" offset="0"/>
              <rom name="v4.10d" merge="v4.10d" size="32" crc="3b5836b4" sha1="b630bb277d9ec09d46ef26b944014dd6165b35d8" region="proms" offset="20"/>
              <rom name="v3.3j" merge="v3.3j" size="32" crc="51eef657" sha1="eaedce5caf55624ad6ae706aedf82c5717c60f1f" region="proms" offset="40"/>
              <rom name="cbdash.cas" size="32768" crc="cba4c1af" sha1="5d163d8e31c58b20679c6be06b1aa02df621822b" region="cassette" offset="0"/>
              <chip type="cpu" tag="maincpu" name="M6502" clock="750000"/>
              <chip type="cpu" tag="audiocpu" name="M6502" clock="500000"/>
              <chip type="cpu" tag="mcu" name="I8041" clock="6000000"/>
              <chip type="audio" tag="mono" name="Speaker"/>
              <chip type="audio" tag="ay1" name="AY-3-8910A" clock="1500000"/>
              <chip type="audio" tag="ay2" name="AY-3-8910A" clock="1500000"/>
              <display tag="screen" type="raster" rotate="270" width="256" height="240" refresh="57.444853" pixclock="6000000" htotal="384" hbend="0" hbstart="256" vtotal="272" vbend="8" vbstart="248" />
              <sound channels="1"/>
              <input players="2" buttons="2" coins="2">
                     <control type="joy" ways="8"/>
                     <control type="stick" minimum="16" maximum="240" sensitivity="100" keydelta="10"/>
              <dipswitch name="Coin A" tag="DSW1" mask="3">
                     <dipvalue name="2 Coins/1 Credit" value="0"/>
                     <dipvalue name="1 Coin/1 Credit" value="3" default="yes"/>
                     <dipvalue name="1 Coin/2 Credits" value="2"/>
                     <dipvalue name="1 Coin/3 Credits" value="1"/>
              <dipswitch name="Coin B" tag="DSW1" mask="12">
                     <dipvalue name="2 Coins/1 Credit" value="0"/>
                     <dipvalue name="1 Coin/1 Credit" value="12" default="yes"/>
                     <dipvalue name="1 Coin/2 Credits" value="8"/>
                     <dipvalue name="1 Coin/3 Credits" value="4"/>
              <dipswitch name="Type of Tape" tag="DSW1" mask="48">
                     <dipvalue name="MT (Big)" value="0"/>
                     <dipvalue name="invalid?" value="16"/>
                     <dipvalue name="invalid?" value="32"/>
                     <dipvalue name="MD (Small)" value="48" default="yes"/>
              <dipswitch name="Cabinet" tag="DSW1" mask="64">
                     <dipvalue name="Upright" value="0" default="yes"/>
                     <dipvalue name="Cocktail" value="64"/>
              <dipswitch name="Lives" tag="DSW2" mask="1">
                     <dipvalue name="3" value="1" default="yes"/>
                     <dipvalue name="5" value="0"/>
              <dipswitch name="Bonus Life" tag="DSW2" mask="6">
                     <dipvalue name="None" value="0"/>
                     <dipvalue name="20000" value="6" default="yes"/>
                     <dipvalue name="30000" value="4"/>
                     <dipvalue name="40000" value="2"/>
              <dipswitch name="Difficulty" tag="DSW2" mask="24">
                     <dipvalue name="Normal" value="24" default="yes"/>
                     <dipvalue name="Hard" value="16"/>
                     <dipvalue name="Harder" value="8"/>
                     <dipvalue name="Hardest" value="0"/>
              <dipswitch name="Country Code" tag="DSW2" mask="224">
                     <dipvalue name="A" value="224" default="yes"/>
                     <dipvalue name="B" value="192"/>
                     <dipvalue name="C" value="160"/>
                     <dipvalue name="D" value="128"/>
                     <dipvalue name="E" value="96"/>
                     <dipvalue name="F" value="64"/>
              <driver status="good" emulation="good" color="good" sound="good" graphic="good" savestate="unsupported" palettesize="56"/>

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