colour emulation preliminary
palette 128
display type raster
orientation vertical
resolution 192x240
frequency 60.000000Hz
sound emulation preliminary
channels mono
players 2
nplayers 2P alt
controls joy
buttons 1
coin slots 2
cpu Z80 @ 4MHz
version added .141u2
last change(s) none
name size crc set flags sha1
z1_1.c8  2048  77418b5d  zerohoura    2ff7da1f0d9b311a32736c4784b1ba6acfc29512 
z2_2.c7  2048  9b23b5ac  zerohoura    2baca7a9ef65d5fe8216dce891a933d39bcdb1b1 
z3_3.c6  2048  7aa25c95  zerohoura    0bab20cabeb6ffe77d3122f2b489348b5efbdcb1 
z4_4.c5  2048  b0a26dea  zerohoura    69b00a5c4971fc161453efe6126bd36711420f99 
z5_5.c4  2048  d7ce3add  zerohour    d8dd7ad98e7a0a4f35de181549b2e88a9e0a73d6 
z6_6.c3  2048  8a93ae6e  zerohour    a66f05bb27e67b755c64ac8b68fa38ffe4cd961c 
z9  2048  17ae6f13  zerohour    ce7a02f4e1aa2e5292d3807a0cfed6d92752fc7a 
z7  2048  4c12f59d  zerohour    b99a21415bff0e59b6130df60182f05b1a5d0811 
z8  2048  6b9a6b6e  zerohour    f80d893b1b26c75c297e1da1c20db04e7129c92a 
z1.ic2  32  b55aee56  zerohour    33e4767c8afbb7b3af67517ea1dfd69bf692cac7 
z2.n2  32  9adabf46  zerohour    f3538fdbc4280b6be46a4d7ebb4c34bd1a1ce2b7 
z3.u6  32  27fa3a50  zerohour    7cf59b7a37c156640d6ea91554d1c4276c1780e0 
cabinet art
cabinet zerohour.png
control panel zerohour.png
flyer zerohour.png
additional information
info 0.55 [David Haywood]

  • Add analog sound
  • 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 and changed 'Unknown' dipswitches to 'Unused'.
  • 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 added it to Space Raider, Zero Hour and Red Clash. 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.
Recommended Games (Space Shooter 2):

Devil Zone

Killer Comet



Radar Scope

Space Firebird

Zero Hour

Astro Blaster

Astro Fantasia (Cassette)

Black Hole


Laser Battle

Red Clash

Satan of Saturn

Space Cruiser


Azurian Attack

Battle Cross


Sky Base

Space Raider



Juno First

Mad Planets


Halley's Comet

Sky Fox

Star Fighter

Space Bomber

Romset: 19 kb / 12 files / 12.5 zip
history 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.

  1. Cosmic Monsters [Upright model] (1979)
  2. Cosmic Monsters 2 (1979)
  3. Cosmic Guerilla (1979)
  4. Cosmic Alien (1980)
  5. Devil Zone (1980)
  6. Zero Hour (1980)
  7. Cosmic Avenger (1981)
resource links view in MAWS
view in mini MAWS
view in CAESAR
view high score and replay at MARP
view in Progetto EMMA (Italian)
view game bugs at MAME Testers
view driver bugs at MAME Testers
view in arcade-history.com
view in KLOV
view in The Arcade Flyer Archive
view in The Arcade Flyer Archive
view in The Arcade Flyer Archive
view in VGMuseum Gamepics