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hiimpactp: MAME ROM Information.


High Impact Football (c) 1990 Williams Electronics Games, Inc.

An American Football game from Williams.


Williams Y Unit hardware

Main CPU : TMS34010 (@ 6.25 Mhz)

Sound CPU : M6809 (@ 2 Mhz)

Sound Chips : YM2151 (@ 3.57958 Mhz), DAC, HC55516 (@ 3.57958 Mhz)

Screen orientation : Horizontal

Video resolution : 396 x 256 pixels

Screen refresh : 53.20 Hz

Palette colors : 4096

Players : 4

Control : 8-way joystick

Buttons : 1


Released in December 1990.

A High Impact Football unit appears in the 1991 movie 'Terminator 2 - Judgment Day'.


1. High Impact Football (1990)

2. Super High Impact (1991)


Designed by: Ed Boon (EJB), John Newcomer (JRN), Eugene Jarvis (EPJ) (DRJ), Tim Coman (TIM), Jim Gentile (JPG), Doug Watson (DTW)

Music and Sounds : Dan Forden (DWF)

Others from highscore table : (JIM), George N. Petro (GNP), Todd Allen (TRA), (TMM), Mark Penacho (MDP), Steve Ritchie (SSR), Sheridan Oursler (SNO), (LOF), Mark Turmell (MJT)


Game's rom.

Machine's picture.

Highscore table.

MAME Info:

0.131u3 [Tormod, Smitdogg, Dumping Union]

0.84u5 [Brian Troha]

0.34b7 [Alex Pasadyn, Zsolt Vasvari, Kurt Mahan]


- 0.145u7: Added 'Williams CVSD Sound Board' sound.

- 0.137u2: A. Hoekman, Tormod, Smitdogg and The Dumping Union added clone High Impact Football (rev LA2 12/26/90).

- 26th March 2010: Smitdogg - We got the last known revision of High Impact Football (LA2).

- 15th August 2009: Guru - From Smitdogg/The Dumping Union we got Protection chip from High Impact.

- 0.133u1: Renamed (hiimpac4) to (hiimpact4), (hiimpac3) to (hiimpact3), (hiimpac1) to (hiimpact1) and (hiimpacp) to (hiimpactp).

- 2nd July 2009: Smitdogg - I pulled a protection chip from High Impact for decapping.

- 0.132u2: K. Lee, M. Josephson and Smitdogg added clone High Impact Football (rev LA1 12/16/90).

- 19th June 2009: Smitdogg - Thanks to K. Lee & M. Josephson we got High Impact Football (LA1).

- 0.131u3: Tormod, Smitdogg and Dumping Union added High Impact Football (rev LA5 02/15/91). Renamed (hiimpact) to (hiimpac4).

- 24th May 2009: Smitdogg - Thanks to Tormod we got High Impact Football LA5 (newest version dumped).

- 0.122u6: Changed TMS34010 CPU1 clock speed to 40MHz and M6809E CPU2 to 8MHz.

- 0.122u4: Changed TMS34010 CPU1 clock speed to 5MHz and YM2151 to 3579545 Hz. Replaced M6809 CPU2 with M6809E.

- 0.114u1: Changed TMS34010 CPU clock speed to 6MHz, visible area to 399x253 and VSync to 27.407585 Hz.

- 0.106u13: MASH added pld ($400 - pls153a.u40) to High Impact Football and clones.

- 22nd February 2005: Dumping Project - Randy have won a 'High Impact Football' proto board on eBay.

- 0.93: Brian Troha added clone High Impact Football (prototype, rev 8.6 12/09/90).

- 0.84u5: Brian Troha added 'High Impact Football (rev LA4 02/04/91)'. Renamed (hiimpact) to (hiimpac3).

- 0.63: Changed visible area to 396x256.

- 0.37b5: Changed visible area to 400x255 and palettesize from 65536 to 4096 colors.

- 0.36b16: Added Custom sound and changed VSync to 53.204948 Hz.

- 0.36b9: Changed visible area to 396x256.

- 21st September 1999: Zsolt Vasvari did another TMS34010 update, and Hi Impact is now 1-2 fps faster.

- 0.35b2: Replaced the 3x DAC sound with HC55516 and 1x DAC.

- 0.34b8: Changed description to 'High Impact Football (rev LA3 12/27/90)'.

- 0.34b7: Alex Pasadyn, Zsolt Vasvari and Kurt Mahan added High Impact Football (Williams 1990).

Recommended Games (Football):

Atari Football

10-Yard Fight

Scrum Try (DECO Cassette)

Gridiron Fight

Street Football

Great Football (Mega-Tech)


Tecmo Bowl

Tecmo Bowl (PlayChoice-10)

TouchDown Fever


John Elway's Team Quarterback

All American Football

High Impact Football

Super High Impact

Pigskin 621AD

Joe Montana II: Sports Talk Football (Mega-Tech)

Football Frenzy

Hard Yardage

Two Minute Drill

Beat the Champ

Rushing Heroes

NFL Blitz

NFL Blitz '99

NFL Blitz 2000 Gold Edition

NFL Classic Football

Dirty Pigskin Football


Field Goal

Romset: 2177 kb / 18 files / 1.11 zip

MAME XML Output:

       <game name="hiimpactp" sourcefile="midyunit.c" cloneof="hiimpact" romof="hiimpact">
              <description>High Impact Football (prototype, rev 8.6 12/09/90)</description>
              <rom name="sl1u4.bin" merge="sl1u4.bin" size="131072" crc="28effd6a" sha1="4a839f15e1b453a22fdef7b1801b8cc5cfdf3c29" region="cvsd:cpu" offset="10000"/>
              <rom name="sl1u19.bin" merge="sl1u19.bin" size="131072" crc="0ea22c89" sha1="6d4579f6b10cac685be01348451b3537a0626034" region="cvsd:cpu" offset="30000"/>
              <rom name="sl1u20.bin" merge="sl1u20.bin" size="131072" crc="4e747ab5" sha1="82040f40aac7dae577376a742eadaaa9644500c1" region="cvsd:cpu" offset="50000"/>
              <rom name="u105-pa1" size="131072" crc="79ef9a35" sha1="200d50b108401e889b6200c53c203ee5041d1423" region="user1" offset="c0000"/>
              <rom name="u89-pa1" size="131072" crc="2bd3de30" sha1="ee3615c1cc5b948731eb258887641f059b942b25" region="user1" offset="c0001"/>
              <rom name="la1u111.bin" merge="la1u111.bin" size="131072" crc="49560560" sha1="03d51e6019afa9a396c91a484969be4922fa4c99" region="gfx1" offset="0"/>
              <rom name="la1u112.bin" merge="la1u112.bin" size="131072" crc="4dd879dc" sha1="ac4f02fcb933df38f1ebf51b109092b77563b684" region="gfx1" offset="20000"/>
              <rom name="la1u113.bin" merge="la1u113.bin" size="131072" crc="b67aeb70" sha1="dd1512329c46da4254712712b6f847544f4487bd" region="gfx1" offset="40000"/>
              <rom name="la1u114.bin" merge="la1u114.bin" size="131072" crc="9a4bc44b" sha1="309eb5214fe5e1fe64d724d515190a31fc524aae" region="gfx1" offset="60000"/>
              <rom name="la1u95.bin" merge="la1u95.bin" size="131072" crc="e1352dc0" sha1="7faa2cfa9ebaf2d99b243232316221b672869703" region="gfx1" offset="200000"/>
              <rom name="la1u96.bin" merge="la1u96.bin" size="131072" crc="197d0f34" sha1="2d544588c3241423188ac7fb7aff87043fdd063d" region="gfx1" offset="220000"/>
              <rom name="la1u97.bin" merge="la1u97.bin" size="131072" crc="908ea575" sha1="79802d8df4e016d178be98333d2b1d047a27eccc" region="gfx1" offset="240000"/>
              <rom name="la1u98.bin" merge="la1u98.bin" size="131072" crc="6dcbab11" sha1="7432172810fd4b922b61769c68d86f24769a42cf" region="gfx1" offset="260000"/>
              <rom name="la1u106.bin" merge="la1u106.bin" size="131072" crc="7d0ead0d" sha1="1e65b6e7e629021d70603df37db5fa89cfe93175" region="gfx1" offset="400000"/>
              <rom name="la1u107.bin" merge="la1u107.bin" size="131072" crc="ef48e8fa" sha1="538de37cd8342085ec27f67292a7eeb1007e3b1f" region="gfx1" offset="420000"/>
              <rom name="la1u108.bin" merge="la1u108.bin" size="131072" crc="5f363e12" sha1="da398c0204f785aad4c52007d2f25031ecc1c63f" region="gfx1" offset="440000"/>
              <rom name="la1u109.bin" merge="la1u109.bin" size="131072" crc="3689fbbc" sha1="d95c0a2e3abf977ba7a899e419c22d004020c560" region="gfx1" offset="460000"/>
              <rom name="ep610.u8" size="815" status="nodump" region="plds" offset="0"/>
              <rom name="pls153a.u40" merge="pls153a.u40" size="235" crc="69e5143f" sha1="1a1e7b3233f7d5a1c161564710e8e984a9b0a16c" region="plds" offset="400"/>
              <rom name="ep610.u51" size="815" status="nodump" region="plds" offset="500"/>
              <rom name="ep610.u52" size="815" status="nodump" region="plds" offset="900"/>
              <rom name="ep610.u65" size="815" status="nodump" region="plds" offset="d00"/>
              <chip type="cpu" tag="maincpu" name="TMS34010" clock="40000000"/>
              <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" />
              <sound channels="1"/>
              <input players="4" buttons="1" coins="3" 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="Unused" tag="DSW" mask="1">
                     <dipvalue name="Off" value="1" default="yes"/>
                     <dipvalue name="On" value="0"/>
              <dipswitch name="Unused" tag="DSW" mask="2">
                     <dipvalue name="Off" value="2" default="yes"/>
                     <dipvalue name="On" value="0"/>
              <dipswitch name="Unused" tag="DSW" mask="4">
                     <dipvalue name="Off" value="4" default="yes"/>
                     <dipvalue name="On" value="0"/>
              <dipswitch name="Coinage" tag="DSW" mask="56">
                     <dipvalue name="1" value="56" default="yes"/>
                     <dipvalue name="2" value="24"/>
                     <dipvalue name="3" value="40"/>
                     <dipvalue name="4" value="8"/>
                     <dipvalue name="ECA" value="48"/>
                     <dipvalue name="Free Play" value="0"/>
              <dipswitch name="Coinage Source" tag="DSW" mask="64">
                     <dipvalue name="Dipswitch" value="64"/>
                     <dipvalue name="CMOS" value="0" default="yes"/>
              <dipswitch name="Cabinet" tag="DSW" mask="128">
                     <dipvalue name="Upright" value="128" default="yes"/>
                     <dipvalue name="Cocktail" value="0"/>
              <dipswitch name="Test Switch" tag="DSW" mask="256">
                     <dipvalue name="Off" value="256" default="yes"/>
                     <dipvalue name="On" value="0"/>
              <dipswitch name="Video Freeze" tag="DSW" mask="512">
                     <dipvalue name="Off" value="512" default="yes"/>
                     <dipvalue name="On" value="0"/>
              <dipswitch name="Players" tag="DSW" mask="3072">
                     <dipvalue name="4 Players" value="3072" default="yes"/>
                     <dipvalue name="3 Players" value="1024"/>
                     <dipvalue name="2 Players" value="2048"/>
                     <dipvalue name="1 Player" value="0"/>
              <dipswitch name="Coin Counters" tag="DSW" mask="4096">
                     <dipvalue name="One Counter" value="4096"/>
                     <dipvalue name="Two Counters" value="0" default="yes"/>
              <dipswitch name="Powerup Test" tag="DSW" mask="8192">
                     <dipvalue name="Off" value="0" default="yes"/>
                     <dipvalue name="On" value="8192"/>
              <dipswitch name="Country" tag="DSW" mask="49152">
                     <dipvalue name="USA" value="49152" default="yes"/>
                     <dipvalue name="French" value="32768"/>
                     <dipvalue name="German" value="16384"/>
              <driver status="good" emulation="good" color="good" sound="good" graphic="good" savestate="supported" palettesize="4096"/>

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