exerion Exerion

Immagine gioco: Exerion
Available images:

Romset name: exerion.zip
Production year: 1983
Manufacturer: Jaleco

Game genre: Shooter
Category: Shooter / Gallery

This machine has the following clones:
 • Exerion (bootleg)
 • Exerion (Taito)

This machine works in MAME This machine works in MAME

Overall emulation: Good
Color emulation: Good
Sound emulation: Good
Graphics emulation: Good
Save states: Supported

In MAME since version: .030

The MAME driver of this machine is: exerion.cpp - Read the code

 Tech info 
 Hardware of this machine:
  • CHIPs [Show details]

    Z80 ("maincpu")cpu 3328000 Hz
    Z80 ("sub")cpu 3328000 Hz
    Speaker ("mono")audio
    AY-3-8910A ("ay1")audio 1664000 Hz
    AY-3-8910A ("ay2")audio 1664000 Hz

  • Screens [Show details]

    This machine uses a single screen:
      Graphic type: Raster
      Screen orientation: Vertical
      Resolution 320 x 224 @ 61.320755 Hz

  • Number of players: 2P Alternated
  • Controllers [Show details]

      Joystick [8 ways]
      Joystick [8 ways]
    Number of buttons: 2

  • Dip-switches [Show details]

    Default settings in bold
     254 (Cheat)
    Bonus Life10000
    Coinage5 Coins/1 Credit
     4 Coins/1 Credit
     3 Coins/1 Credit
     2 Coins/1 Credit
     1 Coin/1 Credit
     1 Coin/2 Credits
     1 Coin/3 Credits
     1 Coin/4 Credits

  • ROMs (16 of the machine set) [Show details]

    Referred to MAME version: 0.181

    NameSizeCRC32SHA1StatusIn romset
    exerion.0781924c78d57d ac702e9ad2bc05493fb1355858667c31c36acfe4 good exerion
    exerion.088192dcadc1df 91388f617cfaa4289ca1c84c697fcfdd8834ae15 good exerion
    exerion.09819234cc4d14 511c9de038f7bcaf6f7c96f2cbbe50a80673fa72 good exerion
    exerion.05819232f6bff5 a4d0289f9d1d9eea7ca9a32a0616af48da74b401 good exerion
    exerion.068192435a85a4 f6846bfee11df754405d4d796e7d8ac0321b6eb6 good exerion
    exerion.118192f0633a09 8989bcb12abadde34777f7c189cfa6e2dfe92d62 good exerion
    exerion.10819280312de0 4fa3bb9d5c62e41a54e8909f8d3b47637137e913 good exerion
    exerion.038192790595b8 8016ac2394b25db38e962bcff4805380082f6683 good exerion
    exerion.048192d7abd0b9 ca6413ecd324cf84e11b703a4eda2c1e6d28ff15 good exerion
    exerion.0181925bb755cb ec92c518c116a78dbb23381468cefb3f930212cc good exerion
    exerion.028192a7ecbb70 3c359d5bb21290a45d3eb18fea2b1f9439b931be good exerion
    exerion.e1322befcc20 a24d3f691413378fde545a6ddcef7e5118e74019 good exerion
    exerion.i825631db0e08 1041a778e86d3fe6f057cf40a0a08b30760f3887 good exerion
    exerion.h1025663b4c555 30243041be4fa77ada71e8b29d721cad51640c29 good exerion
    exerion.i3256fe72ab79 048a72e6db4768df687df927acaa70ef906b3dc0 good exerion
    exerion.k4256ffc2ba43 03be1c41d6ac3fc11439caef04ef5ffa60d6aec4 good exerion

    :  PARENT Machine
    :  CLONE Machine
    :  BIOS
    :  Device


Exerion (c) 1983 Jaleco Co., Ltd [Japan Leisure].

An early shoot'em up featuring parallax effects in the background and a nice simulation of inertia in the control of the ship.


Main CPU : (2x) Z80 (@ 3.333333 Mhz)

Sound Chips : (2x) AY8910 (@ 1.666666 Mhz)

Players : 2

Control : 8-way joystick

Buttons : 2


Exerion was released in November 1983.

Licensed to Taito for US distribution.

A part of this game was later used in the fifth stage of "The Game Paradise". The stage is called '23bit CPU captured by 8bit CPU'.

Giorgio Bonetti holds the official record for this game with 3,679,100 points.


* Hint : To get a high score, if you do not miss any shots your bonus score will keep on doubling to 10,000 then reset to 000. When at 10,000 miss a shot then bonus score will revert to 5,000.

* Bug : In the challenge stage, if you shoot all 40 aliens you normally get a bonus charge of 60. Sometimes a red hydra comes out during this stage. If you shoot it and all 40 aliens, you get a total of 41. The game seems to fail the test of 'hits=40' and only gives you a bonus charge of 41.


* Consoles :

Sega SG-1000 [JP] (1983) "Exerion [Model G-1028]"

Nintendo Famicom [JP] (February 11, 1985) [Model JF-01]

Sony PlayStation [JP] (October 23, 2003; "Jaleco Collection Vol.1 [Model SLPS-03562]") Famicom version

Nintendo Wii [Virtual Console] (May 1, 1987) Famicom version

* Computers :

MSX [JP] (1984)


Game's rom.

Machine's picture.

Giochi Simili

Warning: information in history.dat can differ from the ones present in the rest of the page (taken from MAME) as they come from a different source

Information on exerion

0.30 [Brad Oliver]

Artwork available


- 20th October 2012: Mr. Do - Thanks to Mikonos from Zona Arcade, we have a cleaned-up bezel for Exerion, scanned by Mr. Do.

- 0.136u4: Stephane Humbert fixed dipswitches and inputs in Exerion and clones (after verification of the Z80 code)

- 0.135u2: Fabio Priuli added save state support to Exerion.

- 0.135u1: Corrado Tomaselli verified/changed clocks and VSync in Exerion. Changed clock speed of Z80 CPU1/2 to 3328000 Hz, the 2x AY-3-8910A to 1664000 Hz and VSync to 61.320755 Hz.

- 0.124: Aaron Giles fixed assertions in Exerion.

- 0.123u4: Zsolt Vasvari fixed sprite colors in Exerion. Updated driver to use PORT_CHANGED. Combined memory maps where applicable.

- 0.123u1: Changed palettesize to 768 colors.

- 0.116: ShimaPong fixed Exerion ends regardless after the bonus stage, when you die.

- 0.115u1: Pierpaolo Prazzoli fixed Exerion ends regardless of # of ships in reserve after the bonus stage, when you die.

- 0.114u1: Aaron Giles fixed video update in Exerion.

- 0.113u2: Changed VSync to 61.419019 Hz.

- 0.113u1: Changed VSync to 61.419018 Hz.

- 0.57: Added new color prom ($120).

- 15th November 2001: Aaron Giles re-added the correct Exerion color PROM.

- 24th September 2001: Dave Widel provided the correct color PROM for Exerion.

- 0.37b1: Aaron Giles fixed background in Exerion. Added Z80 (3333333 Hz) CPU2 and 2nd player.

- 26th March 2000: Aaron Giles added cocktail support to Exerion.

- 25th March 2000: Aaron Giles finally added the background graphics to Exerion, however a few color problems might still remain.

- 24th January 2000: Zsolt Vasvari fixed Exerion crash bugs.

- 0.36b12: Bypassed the protection in Exerion [Zsolt Vasvari]. Added 'Cabinet' dipswitch.

- 8th December 1999: Zsolt Vasvari fixed a protection related bug in Exerion.

- 0.35b1: Known issues: Exerion (Taito) resets when you try to start a game.

- 0.34b8: Fixed gfx rom and proms loading.

- 0.34b7: Changed description to 'Exerion'.

- 0.34b5: Nicola Salmoria added clone Exerion (Taito). The game resets when you try to start a game. Changed parent description to 'Exerion (Jaleco)'.

- 0.34b1: Added proms ($0, 20, 120, 220, 230 - color/lookup).

- 0.33b5: Nicola Salmoria added Exerion (bootleg?).

- 31st May 1998: J-ROM dumped Exerion (bootleg).

- 0.31: John Butler fixed pixel doubled sprites in Exerion. Known issues: Sometimes the game resets while you are playing.

- 0.30: Brad Oliver added Exerion (Jaleco 1983). Exerion is a unique driver in that it has idiosyncracies that are straight out of Bizarro World. The background graphics are missing. Sometimes the game resets while you are playing. It has been reported that the original did it as well, but this is still uncertain. The mystery reads from $d802 - timer-based protection? The freakish graphics encoding scheme, which no other MAME-supported game uses. The sprite-ram, and all the funky parameters that go along with it. The unusual parallaxed background. Is it controlled by the 2nd CPU?

LEVELS: 1 (endless)

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