zerohour Zero Hour (set 1)

Immagine gioco: Zero Hour (set 1)
Available images:

Romset name:
Production year: 1980
Manufacturer: Universal

Game genre: Shooter
Category: Shooter / Gallery

This machine has the following clones:
 • Zero Hour (Inder)
 • Zero Hour (set 2)

This machine works in MAME with problems This machine works in MAME with problems

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

In MAME since version: .055

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

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

    Z80 ("maincpu")cpu 4000000 Hz

  • Screens [Show details]

    This machine uses a single screen:
      Graphic type: Raster
      Screen orientation: Vertical
      Resolution 240 x 192 @ 60.000000 Hz

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

      Joystick [8 ways]
      Joystick [8 ways]
    Number of buttons: 1

  • Dip-switches [Show details]

    Default settings in bold
    Bonus LifeNo Bonus
    Coin A4 Coins/1 Credit
     3 Coins/1 Credit
     2 Coins/1 Credit
     3 Coins/2 Credits
     1 Coin/1 Credit
     2 Coins/3 Credits
     1 Coin/2 Credits
     1 Coin/3 Credits
     1 Coin/4 Credits
     1 Coin/5 Credits
    Coin B4 Coins/1 Credit
     3 Coins/1 Credit
     2 Coins/1 Credit
     3 Coins/2 Credits
     1 Coin/1 Credit
     2 Coins/3 Credits
     1 Coin/2 Credits
     1 Coin/3 Credits
     1 Coin/4 Credits
     1 Coin/5 Credits

  • ROMs (12 of the machine set) [Show details]

    Referred to MAME version: 0.181

    NameSizeCRC32SHA1StatusIn romset
    ze1_1.c820480dff4b48 4911255f953851d0e5c2b66090b95254ac59ac9e good zerohour
    ze2_2.c72048cf41b6ac 263794e6be22c20e2b10fe9099e475097475df7b good zerohour
    ze3_3.c620485ef48b67 ae291aa84b109e6a51eebdd5526abca1d901b7b9 good zerohour
    ze4_4.c5204825c5872d df008db607b72a92c4284d6a8127eafec2432ca4 good zerohour
    ze5_5.c42048d7ce3add d8dd7ad98e7a0a4f35de181549b2e88a9e0a73d6 good zerohour
    ze6_6.c320488a93ae6e a66f05bb27e67b755c64ac8b68fa38ffe4cd961c good zerohour
    z9204817ae6f13 ce7a02f4e1aa2e5292d3807a0cfed6d92752fc7a good zerohour
    z720484c12f59d b99a21415bff0e59b6130df60182f05b1a5d0811 good zerohour
    z820486b9a6b6e f80d893b1b26c75c297e1da1c20db04e7129c92a good zerohour
    z1.ic232b55aee56 33e4767c8afbb7b3af67517ea1dfd69bf692cac7 good zerohour
    z2.n2329adabf46 f3538fdbc4280b6be46a4d7ebb4c34bd1a1ce2b7 good zerohour
    z3.u63227fa3a50 7cf59b7a37c156640d6ea91554d1c4276c1780e0 good zerohour

    :  PARENT Machine
    :  CLONE Machine
    :  BIOS
    :  Device


Zero Hour (c) 1980 Universal.

Maneuver your spaceship and destroy meteorites and enemy ships falling from the top of the screen. Shooting a red meteorite awards a quadruple score. After all enemy ships have been destroyed, a landing pad will appear where you must carefully land your ship. Bonus points are awarded for a successful landing.


Game ID : 8011

Main CPU : Z80 (@ 4 Mhz)

Screen orientation : Vertical

Video resolution : 192 x 240 pixels

Screen refresh : 60.00 Hz

Palette colors : 64

Players : 2

Control : 8-way joystick

Buttons : 1


Released in December 1980.


Meteorite (large) : 5 points.

Meteorite (middle) : 10 points.

Meteorite (small) : 15 points.

Enemy spaceship : 20 points.

Enemy missile : 3 points.


Cosmic Series

1. Cosmic Monsters (1979)

2. Cosmic Monsters 2 (1979)

3. Cosmic Guerilla (1979)

4. Cosmic Alien (1980)

5. Devil Zone (1980)

6. Zero Hour (1980)

7. Space Panic (1980)

8. Cosmic Avenger (1981)


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 zerohour

0.55 [David Haywood]


* Add analog sound


- 0.146: hap fixed regression in Red Clash driver (hang on boot).

- 0.141u2: Andrew Welburn and The Dumping Union added clone Zero Hour (set 2). Changed parent description to 'Zero Hour (set 1)'. Fixed rom names.

- 3rd February 2011: Smitdogg - Andy Welburn dumped a previously undumped set of Zero Hour.

- 0.135u3: Fabio Priuli added driver data struct and save states to the Red Clash driver.

- 0.131u1: Angelo Salese merged memory maps in the Red Clash driver, also cleaned-up the irq/nmi generation on coin insertion.

- 0.123u2: Changed palettesize to 128 colors.

- 0.122u8: RansAckeR fixed 'Bonus Life' dipswitch.

- 0.111u4: Mike Ellery improved dipswitches in Zero Hour. Added 'Bonus Life' dipswitch. Changed 'Unknown' to 'Unused' dipswitches.

- 11th August 2005: Frank Palazzolo - I bought a Zero Hour board on eBay. Hopefully I can improve the driver when I finally get time to work on MAME again, now that I'm intimately familiar with the starfield generator circuit.

- 0.97u2: Frank Palazzolo cleaned up starfield code and fixed/added starfields to Zero Hour. Changed palettesize to 64 colors.

- 15th June 2005: Frank Palazzolo - I've hooked up the starfield generator code to Zero Hour and Red Clash.

- 3rd May 2005: Frank Palazzolo - Well, I found time to make a few more discoveries. The Space Raider boardset is 3 PCB's. Two of them are full size and obviously two halves of the same design. Then, there is a little PCB grafted on top, connected via a 24-pin dip connector, with wires going to the other two boards. I suspected that this board was the starfield generator. Sure enough, if you unplug it and run the board, the stars disappear. Cool - less work for me. Then, I noticed something else. Two chips were missing from the board, and it was labeled with the number 8011, unlike the other boards. Maybe this board is from another game? Searching through the MAME code, there is a comment that Universal game #8011 is Zero Hour. Luckily, a manual and schematics are available for Zero Hour. The starfield board is the same! In Zero Hour, this board provides both color generation and stars. The missing chips in Space Raider disable the color generation part, since that's already on the main board. Anyways, I added preliminary support for the scrolling stars to MAME, and it looks right. I need to measure a few more things to get the timing exact. When I'm done with Space Raider, I'd like to add the stars to the Zero Hour / Red Clash driver, since it's missing there as well.

- 0.72: Fixed dipswitches in Zero Hour.

- 0.55: David Haywood added Zero Hour (Universal 1980).

- 30th August 2001: Nicola Salmoria improved Zero Hour.

- 27th August 2001: David Haywood added Zero Hour to the Red Clash driver, but it has some graphical issues.

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