* 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.

0.30 [Brad Oliver]

Artwork available

WIP:
- 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)

Romset: 90 kb / 16 files / 37.1 zip