strkforc: MAME ROM Information.
History:
Strikeforce (c) 1991 Midway.
Saurian lizard men have overrun all twenty-two planets that form the New Earth Solar System colonies, capturing and mutating the resident human colonies into reptiles to use as slave labour at their stronghold base, the Saurian Mega-Star Apocalypse
In the 3rd game in Midway's seminal "Defender" series, Strikeforce again has the player flying a spaceship over the surface of a series of two-way, horizontally scrolling planets, destroying enemy waves and rescuing humans from the alien invaders; with rescued humans hanging from the underside of the player's ship. Once these tasks have been completed, the mothership arrives to pick up the player's ship, together with any humans they have rescued. Players can decide which planets to attack, when to purchase additional firepower and when to attack the Apocalypse.
Strikeforce's graphics differ from the minimalist, stylish appearance of the first two games in the series; with full colour sprites, multi-layer scrolling and colourful, visceral explosions giving the game its own distinctive look and feel.
- TECHNICAL -
Midway Y Unit hardware
Main CPU : TMS34010 (@ 6.25 Mhz)
Sound CPU : M6809 (@ 2 Mhz)
Sound Chips : YM2151 (@ 3.57958 Mhz), DAC (@ 3.57958 Mhz), HC55516 (@ 3.57958 Mhz)
Screen orientation : Horizontal
Video resolution : 400 x 255 pixels
Screen refresh : 53.20 Hz
Palette colors : 256
Players : 2
Control : 8-way joystick
Buttons : 3
- TRIVIA -
Released in February 1991.
If you look at the Today's Victors part of the high score screen, you should see the initials DEF for rank 5, END in rank 6, and ER in rank 7; they spell out the word, 'DEFENDER' (as in the game, "Defender").
- TIPS AND TRICKS -
* To reach the ultimate bad guy without having to go through the entire enemy starship, you just play the LEFT player, and get yourself killed at the far LEFT end of the starship (the very beginning). When you reincarnate, you'll be at the far RIGHT end of the board, past the wall (or IN the wall if you weren't far enough left). The boss will not appear until you move to the left past where he should be (though things will start firing at you immediately). Kill the boss, get your free credit, start again. ;)
* Strategy Tip : kill dreadnaughts with one timewarp and one cluster bomb. You always get the time warp back, plus other goodies.
* Score Hogging Tip : clear out all the planets but one, and then fly around from starbase to starbase waiting for dreadnaughts to appear. Pick 'em off using the above method. This gets boring after a while, of course...
- SERIES -
1. Defender (1980)
2. Stargate (1981)
3. Strikeforce (1991)
4. Defender 2000 (1996, Atari Jaguar)
- STAFF -
Programmers : Todd Allen (TRA), Eric Pribyl (ELP)
Artists : John Vogel (JCV), Jim Gentile (JPG)
Music and Sounds : Chris Granner (C G), Rich Karstens (R K)
Staff : Sheridan Oursler (S O), Mark Penacho (MDP), Tim Coman (TIM), John Tobias (JON), Jack E. Haeger (JEH), Eugene Jarvis (EPJ), Ray Czajka (RAY), George N. Petro (GNP), (BUN), (LOF), Al Lasko (A L), Cary Mednick (CMM), Steve Ritchie (SSR), Larry DeMar (LED), Mark Turmell (M T), (MTN), (NLN), (JTK)
- SOURCES -
Game's rom.
Machine's picture.
MAME Info:
0.34b7 [Alex Pasadyn, Zsolt Vasvari, Kurt Mahan]
Bugs:
- In the test menu the RGB screens flicker on the upper side. RansAckeR (ID 00275)
WIP:
- 0.145u7: Added 'Williams CVSD Sound Board' sound.
- 0.122u6: Changed TMS34010 CPU1 clock speed to 48MHz and M6809E CPU2 to 8MHz.
- 0.122u4: Replaced M6809 CPU with M6809E. Changed YM2151 clock speed to 3579545 Hz.
- 0.114u1: Changed TMS34010 CPU clock speed to 6MHz, visible area to 399x253 and VSync to 27.407585 Hz.
- 0.37b5: Changed visible area to 400x255 and palettesize from 65536 to 256 colors.
- 0.36b16: Added Custom sound and changed VSync to 53.204948 Hz.
- 0.36b4: Changed VSync to 57 Hz.
- 0.35b2: Replaced the 3x DAC sound with HC55516 and 1x DAC.
- 0.34b8: Changed description to 'Strike Force (rev 1 02/25/91)'.
- 0.34b7: Alex Pasadyn, Zsolt Vasvari and Kurt Mahan added Strike Force (Midway 1991).
PLAY INSTRUCTIONS:
- The Saurian invasion must be stopped! Only you, Strikeforce, can stop them.
- Your Mission: Destroy apocalypse the Saurian magastar.
- First you must eliminate the invaders.
- Deploy your troops to rescue colonists and capture weapons. Stockpile weapons to blast the apocalypse.
- Study the enemy, then attack fast, hard and without mercy. The universe depends on you STRIKE FORCE.
LEVELS: 23
Recommended Games (Defender):
Defender
Stargate
Malzak
Mayday
Cosmic Avenger
Mars
The Percussor
Scramble
4 Fun in 1 (Scramble)
Space Odyssey
Vanguard
Scorpion
A. D. 2083
Markham
SF-X
Brain
Darius
Darius II
Darius Gaiden - Silver Hawk
Fantasy Zone
Fantasy Zone (Mega-Tech)
Fantasy Zone 2
Alpha One
Back Fire
Thunder Cross
Thunder Cross II
Gigandes
Mega Blast
Air Buster
Arrow Flash (Mega-Tech)
Bio-ship Paladin
Paranoia
ThunderForce AC
Thunder Force II MD (Mega-Tech)
Cosmic Cop
E.D.F. : Earth Defense Force
Metal Black
Strike Force
Xexex
Andro Dunos
Last Resort
Pulstar
Blazing Star
Romset: 1984 kb / 17 files / 980.4 zip
MAME XML Output:
| | <game name="strkforc" sourcefile="midyunit.c"> |
| | | <description>Strike Force (rev 1 02/25/91)</description> |
| | | <manufacturer>Midway</manufacturer> |
| | | <rom name="sfu4.bin" size="65536" crc="8f747312" sha1="729929c209741e72eb83b407cf95d7709ec1b5ae" region="cvsd:cpu" offset="10000"/> |
| | | <rom name="sfu19.bin" size="65536" crc="afb29926" sha1="ad904c0968a90b8187cc87d6c171fbc021d2f66f" region="cvsd:cpu" offset="30000"/> |
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| | | <chip type="cpu" tag="maincpu" name="TMS34010" clock="48000000"/> |
| | | <chip type="cpu" tag="cvsd:cpu" name="M6809E" clock="8000000"/> |
| | | <chip type="audio" tag="mono" name="Speaker"/> |
| | | <chip type="audio" tag="cvsd" name="Williams CVSD Sound Board"/> |
| | | <chip type="audio" tag="cvsd:ym2151" name="YM2151" clock="3579545"/> |
| | | <chip type="audio" tag="cvsd:dac" name="DAC"/> |
| | | <chip type="audio" tag="cvsd:cvsd" name="HC-55516"/> |
| | | <display tag="screen" type="raster" rotate="0" width="399" height="253" refresh="54.815170" pixclock="8000000" htotal="505" hbend="0" hbstart="399" vtotal="289" vbend="0" vbstart="253" /> |
| | | <input players="2" buttons="3" coins="4" tilt="yes"> |
| | | | <control type="joy" ways="8"/> |
| | | <dipswitch name="Service Mode" tag="IN1" mask="16"> |
| | | | <dipvalue name="Off" value="16" default="yes"/> |
| | | | <dipvalue name="On" value="0"/> |
| | | <dipswitch name="Coin Meter" tag="DSW" mask="1"> |
| | | | <dipvalue name="Shared" value="1" default="yes"/> |
| | | | <dipvalue name="Independent" value="0"/> |
| | | <dipswitch name="Credits to Start" tag="DSW" mask="2"> |
| | | | <dipvalue name="1" value="2" default="yes"/> |
| | | | <dipvalue name="2" value="0"/> |
| | | <dipswitch name="Points for Ship" tag="DSW" mask="12"> |
| | | | <dipvalue name="40000" value="8"/> |
| | | | <dipvalue name="50000" value="12" default="yes"/> |
| | | | <dipvalue name="75000" value="4"/> |
| | | | <dipvalue name="100000" value="0"/> |
| | | <dipswitch name="Lives" tag="DSW" mask="16"> |
| | | | <dipvalue name="3" value="16" default="yes"/> |
| | | | <dipvalue name="4" value="0"/> |
| | | <dipswitch name="Difficulty" tag="DSW" mask="224"> |
| | | | <dipvalue name="Level 1" value="128"/> |
| | | | <dipvalue name="Level 2" value="192"/> |
| | | | <dipvalue name="Level 3" value="160"/> |
| | | | <dipvalue name="Level 4" value="224" default="yes"/> |
| | | | <dipvalue name="Level 5" value="96"/> |
| | | | <dipvalue name="Level 6" value="64"/> |
| | | | <dipvalue name="Level 7" value="32"/> |
| | | | <dipvalue name="Level 8" value="0"/> |
| | | <dipswitch name="Coin B" tag="DSW" mask="1792"> |
| | | | <dipvalue name="1 Coin/1 Credit" value="1792" default="yes"/> |
| | | | <dipvalue name="1 Coin/2 Credits" value="1536"/> |
| | | | <dipvalue name="1 Coin/3 Credits" value="1280"/> |
| | | | <dipvalue name="1 Coin/4 Credits" value="1024"/> |
| | | | <dipvalue name="1 Coin/5 Credits" value="768"/> |
| | | | <dipvalue name="1 Coin/6 Credits" value="512"/> |
| | | | <dipvalue name="U.K. Elect." value="256"/> |
| | | | <dipvalue name="Free Play" value="0"/> |
| | | <dipswitch name="Coin A" tag="DSW" mask="30720"> |
| | | | <dipvalue name="5 Coins/1 Credit" value="12288"/> |
| | | | <dipvalue name="4 Coins/1 Credit" value="14336"/> |
| | | | <dipvalue name="3 Coins/1 Credit" value="16384"/> |
| | | | <dipvalue name="2 Coins/1 Credit" value="18432"/> |
| | | | <dipvalue name="1 Coin/1 Credit" value="30720" default="yes"/> |
| | | | <dipvalue name="1 Coin/2 Credits" value="28672"/> |
| | | | <dipvalue name="1 Coin/3 Credits" value="26624"/> |
| | | | <dipvalue name="1 Coin/4 Credits" value="24576"/> |
| | | | <dipvalue name="1 Coin/5 Credits" value="22528"/> |
| | | | <dipvalue name="1 Coin/6 Credits" value="20480"/> |
| | | | <dipvalue name="1 Coin/1 Credit - 2 Coins/3 Credits" value="10240"/> |
| | | | <dipvalue name="1 Coin/1 Credit - 3 Coins/4 Credits" value="8192"/> |
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| | | | <dipvalue name="1 Coin/1 Credit - 5 Coins/6 Credits" value="4096"/> |
| | | | <dipvalue name="3 Coin/1 Credit - 5 Coins/2 Credits" value="2048"/> |
| | | | <dipvalue name="1 Coin/2 Credits - 2 Coins/5 Credits" value="0"/> |
| | | <dipswitch name="Test Switch" tag="DSW" mask="32768"> |
| | | | <dipvalue name="Off" value="32768" default="yes"/> |
| | | | <dipvalue name="On" value="0"/> |
| | | <driver status="good" emulation="good" color="good" sound="good" graphic="good" savestate="supported" palettesize="256"/> |
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