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ipminvad1: MAME ROM Information.


IPM Invader (c) 1979 IPM Corp.


Main CPU : M6502 (@ 2.5 Mhz)

Screen orientation : Vertical

Video resolution : 224 x 240 pixels

Screen refresh : 60.00 Hz

Palette colors : 8

Players : 2

Control : 2-way joystick

Buttons : 1


Released in January 1979. Known as the poor mans version of "Space Invaders".

Irem was founded in 1974 as 'IPM Corp.' in Hakusan, Japan. Like most of their contemporaries, the company's initial purpose was to produce and rent out electronic leisure machinery to various sections of the entertainment industry. With the advent of arcade videogaming and the hugely popular "Space Invaders" (1978), Irem opted to move into the development and manufacturing of their own titles. They rapidly released their own 'invader clone', the aptly named IPM Invader.

IPM Invader was a crude and shameless copycat of Taito's milestone, but yet the sheer popularity of arcade rooms at the time saw the game do well enough to convince the company that games were a viable business opportunity.

In 1979 they changed their corporate name to Irem Corp., an acronym for 'International Rental Electronics Machines'. This would stand until the mid-80s, when it would then be changed to 'Innovations in Recreational Electronic Media'.

For their first few years, Irem's output was average at best. If anything it could almost be considered poor: random invader clones and poorly produced action games disappeared amongst the numerous other titles of the day.

Original products :

Space Invaders (Taito Corp.)

T.T Space Invaders (Taito Corp.)

Space Invaders [Trimline model] (Taito America Corp.)

Licensed products :

Space Invaders [Upright model] [No. 739] (Midway)

Space Invaders [Cocktail Table model] [No. 775] (Midway)

Bootlegs/Hacks list :

Space Invaders (Logitec Co., Ltd.)

T.T Space Invaders (Logitec Co., Ltd.)

Space Invaders (Model Racing)

Space Invaders Part Four

Super Invaders (EMAG corp.)

Super Invaders (Zenitone Microsec)

Super Earth Invasion (Competitive Video)

Super Earth Invasion (Electrocoin, Ltd.)

Alien Invasion Part II

Space War Part Three

Invasion (Sidam)

Invasion (RZ Bologna)

Tilt Invader (NPS)

Darth Vader (unknown)

Clones list :

Beam Invader (Tekunon)

Pacom Invader (Pacom Corp.)

IPM Invader (Irem)

Cosmic Monsters [Upright model] (Universal)

Cosmic Monsters [Cocktail Table model] (Universal)

Cosmic Monsters 2 (Universal)

Space Attack [Upright model] (Video Games, Ltd.)

Space Attack [Cocktail Table model] (Sega)

Space Attack [Upright model] (Sega)

Space Attack [Counter model] (Video Games, Ltd)

Space Attack [Cocktail Table model] (Video Games, Ltd)

Space Attack II (Zenitone Microsec)

Jatre Specter (Jatre)

Space War (Sanritsu)

Space King (Leijac)

Space Intruder (Shoei)

Shuttle Invader (Omori)


It is like "Space Invaders", with identical graphics. It uses a color monitor instead of a black and white monitor with a color overlay.

It has the addition of the famous 'coffee break'. What's the 'coffee break'? The 'coffee break' is a unique feature in IPM Invaders whereas after every 3rd wave or pattern of invaders, the 'coffee break' appears.

Another unique feature in IPM Invader is the 'capsules'. When dip switch settings are changed to advanced settings, the game becomes more difficult with the introduction of the UFO (mystery score ship) dropping 'capsules' that hatch into new invaders. The 'capsules' cannot be destroyed until they hatch, and are dropped across the screen to defeat the players 'narrow column' strategy.


Large Invader : 10 points

Medium Invader : 20 points

Small Invader : 30 points

UFO : 50 to 300 points


Game's rom.

MAME Info:

0.62 [Nicola Salmoria]

0.37b6 [?]

Samples required


- 0.138u1: Changed description to 'IPM Invader' and clone to 'IPM Invader (Incomplete Dump)'.

- 0.133u1: Changed 'I P M Invader (Incomplete Dump)' from a parent set to a clone of 'I P M Invader'. Renamed (ipminva1) to (ipminvad).

- 0.132: Tafoid and Fujix changed year to 1979 (Arcade TV Game List book).

- 0.129u6: Couriersud fixed regression (missing graphics) in 'I P M Invader'.

- 0.128u3: Changed M6502 CPU1 clock speed to 781250 Hz and VSync to 61.783314 Hz.

- 0.127: Couriersud and an unknown dumper added 'I P M Invader (Incomplete Dump)' (Irem ????). This is from an incomplete dump without documentation. The filename contained m10 and with a hack to work around the missing rom you get some action. The files are all different from ipminvad. Either this has been a prototype or eventually the famous "capsule invader".

- 0.123u1: Changed description to 'I P M Invader'.

- 0.122u4: Couriersud added samples to IPM Invader. Just rename your old invaders samples to ipminvad to test. Also added - amongst others - "capsule" dipswitch. Changed M6502 CPU1 clock speed to 625000 Hz and VSync to 60.012483 Hz. Added Samples sound and dipswitches 'Capsules', 'Bonus Life', 'Coin A' and 3x 'Unused'.

- 0.62: Nicola Salmoria added IPM Invader (Irem 1979?).

- 24th August 2002: Nicola Salmoria added IPM Invader to the Sky Chuter driver and fixed the colors in it.

- 0.37b6: Added (irem m10 hardware) (Testdriver).

- 12th August 1998: Malcor dumped I P M Invader (Coffee Break Invaders) by IPM.

Recommended Games (Space Invaders):

Space Invaders

Space Invaders Part II

Return of the Invaders

Space Invaders DX

Super Space Invaders '91

Space Invaders '95 - Attack Of The Lunar Loonies

Space Invaders Anniversary

Space Invaders II

Space Stranger

Super Invader Attack


Invinco / Deep Scan

Invinco / Head On 2

Rolling Crash / Moon Base

Space Attack

Space Attack / Head On

Space Fever

Space Fever High Splitter

Space Fighter Mark II

Space King 2

Beam Invader

Rotary Fighter

IPM Invader

Shuttle Invader

Attack Ufo

Space Intruder

Romset: 9 kb / 9 files / 7.22 zip

MAME XML Output:

       <game name="ipminvad1" sourcefile="m10.c" cloneof="ipminvad" romof="ipminvad" sampleof="ipminvad">
              <description>IPM Invader (Incomplete Dump)</description>
              <rom name="b1g" size="1024" crc="069102e2" sha1="90affe384a688b0d42154633e80b708371117fc2" region="maincpu" offset="1000"/>
              <rom name="b2f" size="1024" crc="a6aa5879" sha1="959ab207110785c03e57ca69c0e62356dd974085" region="maincpu" offset="1400"/>
              <rom name="b3f" size="1024" crc="0c09feb9" sha1="0db43f480162f8e3fb8b61fcceb2884d19ff115b" region="maincpu" offset="1800"/>
              <rom name="b4f" size="1024" crc="a4d32207" sha1="ea9a01d09d82b8c27701601f03989735558d975c" region="maincpu" offset="1c00"/>
              <rom name="b5f" size="1024" crc="192361c7" sha1="b13e80429a9183ce78c4df52a32070416d4ec988" region="maincpu" offset="2000"/>
              <rom name="b6f" size="1024" status="nodump" region="maincpu" offset="2400"/>
              <rom name="b7f" size="1024" crc="0f5115ab" sha1="3bdd3fc1cfe6bfacb5820ee12c15f2909d2f58d1" region="maincpu" offset="2800"/>
              <rom name="b9" size="1024" crc="f6cfa53c" sha1="ec1076982edee95efb24a1bb08e733bcccacb922" region="gfx1" offset="0"/>
              <rom name="b10" size="1024" crc="63672cd2" sha1="3d9fa15509a363e1a32e58a2242b266b1162e9a6" region="gfx1" offset="400"/>
              <sample name="1"/>
              <sample name="2"/>
              <sample name="3"/>
              <sample name="4"/>
              <sample name="5"/>
              <sample name="6"/>
              <sample name="7"/>
              <sample name="8"/>
              <sample name="9"/>
              <sample name="0"/>
              <chip type="cpu" tag="maincpu" name="M6502" clock="781250"/>
              <chip type="audio" tag="mono" name="Speaker"/>
              <chip type="audio" tag="samples" name="Samples"/>
              <display tag="screen" type="raster" rotate="270" width="240" height="224" refresh="61.783314" pixclock="6250000" htotal="360" hbend="8" hbstart="248" vtotal="281" vbend="16" vbstart="240" />
              <sound channels="1"/>
              <input players="2" buttons="1" coins="1">
                     <control type="joy" ways="2"/>
              <dipswitch name="Lives" tag="DSW" mask="3">
                     <dipvalue name="3" value="0" default="yes"/>
                     <dipvalue name="4" value="1"/>
                     <dipvalue name="5" value="2"/>
              <dipswitch name="Capsules" tag="DSW" mask="4">
                     <dipvalue name="No" value="0" default="yes"/>
                     <dipvalue name="Yes" value="4"/>
              <dipswitch name="Bonus Life" tag="DSW" mask="8">
                     <dipvalue name="1500" value="0" default="yes"/>
                     <dipvalue name="1000" value="8"/>
              <dipswitch name="Coin A" tag="DSW" mask="16">
                     <dipvalue name="2 Coins/1 Credit" value="16"/>
                     <dipvalue name="1 Coin/1 Credit" value="0" default="yes"/>
              <dipswitch name="Unused" tag="DSW" mask="32">
                     <dipvalue name="Off" value="0" default="yes"/>
                     <dipvalue name="On" value="32"/>
              <dipswitch name="Unused" tag="DSW" mask="64">
                     <dipvalue name="Off" value="0" default="yes"/>
                     <dipvalue name="On" value="64"/>
              <dipswitch name="Unused" tag="DSW" mask="128">
                     <dipvalue name="Off" value="0" default="yes"/>
                     <dipvalue name="On" value="128"/>
              <configuration name="Cabinet" tag="CAB" mask="1">
                     <confsetting name="Upright" value="0" default="yes"/>
                     <confsetting name="Cocktail" value="1"/>
              <configuration name="Demo Sounds" tag="CAB" mask="2">
                     <confsetting name="Off" value="0" default="yes"/>
                     <confsetting name="On" value="2"/>
              <driver status="preliminary" emulation="preliminary" color="good" sound="imperfect" graphic="good" savestate="supported" palettesize="16"/>

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