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netwars: MAME ROM Information.


Net Wars (c) 1983 Esco Trading Co., Inc.


Main CPU : (2x) Z80 (@ 3.072 Mhz)

Sound Chips : AY8910 (@ 1.5 Mhz)

Screen orientation : Vertical

Video resolution : 224 x 256 pixels

Screen refresh : 60.00 Hz

Palette Colors : 256

Players : 2

Control : 4-way joystick

Buttons : 1


Licensed to Esco Trading.


Game's rom.

MAME Info:

0.61 [Zsolt Vasvari]


- 0.140u2: Atari Ace take some driver_device classes of espial/marineb/zodiack (common code duplicated) that cover multiple drivers and split them so that each driver gets their own driver_device class. In most cases, these drivers got entangled because of audio/mcu code that was shared between multiple drivers.

- 0.136u3: Stephane Humbert fixed dipswitches and inputs (after verification of the Z80 code) for Net Wars. Added dipswitches 'Difficulty', 'Reset on Check Error' and 3x 'Unused'.

- 0.135u1: Fabio Priuli added driver data struct to Espial driver.

- 0.133u5: hap fixed access violation in Net Wars.

- 0.131u1: MooglyGuy audited code, added savestate support to Net Wars and merged memory maps in the Espial driver.

- 0.105u4: Fixed prom names.

- 0.77: Added 'Unknown' dipswitch.

- 0.61: Zsolt Vasvari added Net Wars (Orca 1983 (Esco Trading Co license)).

- 11th June 2002: Zsolt Vasvari added Net Wars to the Espial driver.

LEVELS: 249 (endless)

Recommended Games (Maze 3):


Solar Fox

Space Bugger

Space Dungeon

The Electric Yo-Yo


Ten Spot (Survivor)


Net Wars



Zeroize (DECO Cassette)




Speed Ball (prototype)


Power Surge

Romset: 49 kb / 10 files / 28.3 zip

MAME XML Output:

       <game name="netwars" sourcefile="espial.c">
              <description>Net Wars</description>
              <manufacturer>Orca (Esco Trading Co license)</manufacturer>
              <rom name="netw3.4f" size="8192" crc="8e782991" sha1="4fd533035b61b7006ef94300bb63474fb9e1c9f0" region="maincpu" offset="0"/>
              <rom name="netw4.4h" size="8192" crc="6e219f61" sha1="a27304017251777be501861e106a670fff078d54" region="maincpu" offset="2000"/>
              <rom name="netw1.4n" size="4096" crc="53939e16" sha1="938f505db0cfcfafb751378ae0c139b7f32404cb" region="audiocpu" offset="0"/>
              <rom name="netw2.4r" size="4096" crc="c096317a" sha1="e61a3e9107481fd80309172a1a9a431903e02489" region="audiocpu" offset="1000"/>
              <rom name="netw8.4b" size="8192" crc="2320277e" sha1="4e05f6833de89f8f7cc0a0d1cbec03656f8b54a1" region="gfx1" offset="0"/>
              <rom name="netw7.4a" size="8192" crc="25cc5b7f" sha1="2e089c3d5f8ebba676a959ba71bc9c1750312721" region="gfx1" offset="2000"/>
              <rom name="netw10.4e" size="4096" crc="87b65625" sha1="a702726c0fbe7669604f48bf2c19a54031645731" region="gfx2" offset="0"/>
              <rom name="netw9.4d" size="4096" crc="830d0218" sha1="c726a4a9dd1f10279f79cbe5fdd693a62d9d3ac5" region="gfx2" offset="1000"/>
              <rom name="mmi6301.1f" size="256" crc="f3ae1fe2" sha1="4f259f8da3c9ecdc6010f83b6abc1371366bd0ab" region="proms" offset="0"/>
              <rom name="mmi6301.1h" size="256" crc="c44c3771" sha1="c86125fac28fafc744957258bf3bb5a6dc664b54" region="proms" offset="100"/>
              <chip type="cpu" tag="maincpu" name="Z80" clock="3072000"/>
              <chip type="cpu" tag="audiocpu" name="Z80" clock="3072000"/>
              <chip type="audio" tag="mono" name="Speaker"/>
              <chip type="audio" tag="aysnd" name="AY-3-8910A" clock="1500000"/>
              <display tag="screen" type="raster" rotate="90" width="256" height="224" refresh="60.000000" />
              <sound channels="1"/>
              <input players="2" buttons="1" coins="1">
                     <control type="joy" ways="4"/>
              <dipswitch name="Unused" tag="IN0" mask="1">
                     <dipvalue name="Off" value="0" default="yes"/>
                     <dipvalue name="On" value="1"/>
              <dipswitch name="Difficulty" tag="IN0" mask="2">
                     <dipvalue name="Easy" value="0" default="yes"/>
                     <dipvalue name="Hard" value="2"/>
              <dipswitch name="Unused" tag="IN0" mask="4">
                     <dipvalue name="Off" value="0" default="yes"/>
                     <dipvalue name="On" value="4"/>
              <dipswitch name="Unused" tag="IN0" mask="8">
                     <dipvalue name="Off" value="0" default="yes"/>
                     <dipvalue name="On" value="8"/>
              <dipswitch name="Lives" tag="DSW1" mask="3">
                     <dipvalue name="3" value="0" default="yes"/>
                     <dipvalue name="4" value="1"/>
                     <dipvalue name="5" value="2"/>
                     <dipvalue name="6" value="3"/>
              <dipswitch name="Coinage" tag="DSW1" mask="28">
                     <dipvalue name="2 Coins/1 Credit" value="20"/>
                     <dipvalue name="3 Coins/2 Credits" value="24"/>
                     <dipvalue name="1 Coin/1 Credit" value="0" default="yes"/>
                     <dipvalue name="1 Coin/2 Credits" value="4"/>
                     <dipvalue name="1 Coin/3 Credits" value="8"/>
                     <dipvalue name="1 Coin/4 Credits" value="12"/>
                     <dipvalue name="1 Coin/6 Credits" value="16"/>
                     <dipvalue name="Free Play" value="28"/>
              <dipswitch name="Bonus Life" tag="DSW1" mask="32">
                     <dipvalue name="20k and 50k" value="0" default="yes"/>
                     <dipvalue name="40k and 70k" value="32"/>
              <dipswitch name="Cabinet" tag="DSW1" mask="64">
                     <dipvalue name="Upright" value="64" default="yes"/>
                     <dipvalue name="Cocktail" value="0"/>
              <dipswitch name="Reset on Check Error" tag="DSW1" mask="128">
                     <dipvalue name="No" value="128"/>
                     <dipvalue name="Yes" value="0" default="yes"/>
              <driver status="good" emulation="good" color="good" sound="good" graphic="good" savestate="supported" palettesize="256"/>

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