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shimpactp4: MAME ROM Information.


Super High Impact (c) 1991 Midway.


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 : 396 x 256 pixels

Screen refresh : 53.20 Hz

Palette Colors : 4096

Players : 4

Control : 8-way joystick

Buttons : 1


Released in September 1991.


* Easy defense : When on defense, pick the Suicide defense and take control of either one of the 2 nose guards. Hold down the Turbo button and direction yourself at the quarterback before the ball is even snapped. On virtually every single play, you'll blast through the line and nail the quarterback before he can even move regardless of whether or not the play is a run or pass, simply because the offensive line never bothers to block you when this trick is performed.

* Easily block kicks : When the computer is going for a field goal or extra point, take control of one of the defensive players all the way in the back of the field goal block formation. When the ball is snapped, run at the long snapper, then turbo at the kicker and jump. The glitch comes in the form of the long snapper never bothering to try blocking you, and you'll be able to block virtually any kick with ease.


1. High Impact Football (1990)

2. Super High Impact (1991)


Designed by: Ed Boon (EJB), John Newcomer (JRN), Doug Watson

Music and Sounds : Dan Forden (DWF)

Others from highscore table : Tony Goskie (TWG), Jack E. Haeger (JEH), Eugene Jarvis (EPJ), Tim Coman (TIM), (SYD), George N. Petro (GNP), (JDT), Mark Turmell (MJT), Jon Hey (HEY), Mark Penacho (MDP), John Vogel (VOG), Larry DeMar (LED), Mike Boon (MAB), Bill Pfutzenreuter (PFZ), Mark Ritchie (MDR), Steve Ritchie (SSR), (LJG), Allison Quant (ADQ), (FEB), (TMM), Sam Bennett (SMB), Pat Lawlor (PML), Ward Pemberton (WLP), (MOM), Dan Lee (DKL), Dennis Nordman (DEN), Pat McMahon (PAT), (BLE)


* Consoles :

Sega Mega Drive (1992)

Nintendo Super Famicom (1993)


Game's rom.

Machine's picture.

Highscore table.

MAME Info:

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


- The first time you run the game, it will say 'CMOS INVALID...'. Press P1 START to proceed.


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

- 0.133u1: Renamed (shimpap6) to (shimpactp6), (shimpap5) to (shimpactp5) and (shimpap4) to (shimpactp4).

- 8th June 2009: Guru - Chips for decapping from Super High Impact arrived. Thanks to Smitdogg.

- 0.128u6: Smitdogg added clone Super High Impact (prototype, rev 6.0 09/23/91). Renamed (shimpacp) to (shimpap5).

- 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.

- 0.113u4: Brian Troha added clone Super High Impact (prototype, rev 4.0 09/10/91). Fixed Super High Impact, the game freaks never out during play again.

- 4th March 2005: Guru - Super High Impact Proto PCB arrived. Purchased by Randy on eBay.

- 30th January 2005: Dumping Project - Randy have won on eBay a prototype version of Midway's 'Super High Impact' that might (if we're lucky) be a different revision than the 5.0 prototype MAME currently supports.

- 0.63: Added clone Super High Impact (prototype, rev 5.0 09/15/91). Changed visible area to 396x256.

- 26th August 2002: Stephane Humbert added different versions of Super High Impact to the Williams Y-unit driver.

- 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.

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

- 0.34b8: Changed description to 'Super High Impact (rev LA1 09/30/91)'.

- 0.34b7: Alex Pasadyn, Zsolt Vasvari and Kurt Mahan added Super High Impact (Midway 1991).

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: 3712 kb / 17 files / 2.11 zip

MAME XML Output:

       <game name="shimpactp4" sourcefile="midyunit.c" cloneof="shimpact" romof="shimpact">
              <description>Super High Impact (prototype, rev 4.0 09/10/91)</description>
              <rom name="shiu4.bin" merge="shiu4.bin" size="131072" crc="1e5a012c" sha1="4077fc266799a01738b7f88e867535f1fbacd557" region="cvsd:cpu" offset="10000"/>
              <rom name="shiu19.bin" merge="shiu19.bin" size="131072" crc="10f9684e" sha1="1fdc5364f87fb65f4f2a438841e0fe847f765aaf" region="cvsd:cpu" offset="30000"/>
              <rom name="shiu20.bin" merge="shiu20.bin" size="131072" crc="1b4a71c1" sha1="74b7b4ae76ebe65f1f46b2117970bfefefbb5344" region="cvsd:cpu" offset="50000"/>
              <rom name="u105-pa4" size="131072" crc="770b31ce" sha1="d0bc2ed0f6134afb0dd53236377044a122e7f181" region="user1" offset="c0000"/>
              <rom name="u89-pa4" size="131072" crc="96b622a5" sha1="6d21c69ad1b0990679b616a79ba698772c8d98ff" region="user1" offset="c0001"/>
              <rom name="shiu111.bin" merge="shiu111.bin" size="262144" crc="80ae2a86" sha1="1ff76e3064c7636f6877e426f4a88c094d1a6325" region="gfx1" offset="0"/>
              <rom name="shiu112.bin" merge="shiu112.bin" size="262144" crc="3ffc27e9" sha1="ec337629c17daaa2445fb344e08243de7f09536e" region="gfx1" offset="40000"/>
              <rom name="shiu113.bin" merge="shiu113.bin" size="262144" crc="01549d00" sha1="40604e949cef056f90031850bdb91782135e7ec2" region="gfx1" offset="80000"/>
              <rom name="shiu114.pa3" size="262144" crc="56f96a67" sha1="070ba9c34c23b3037e91c2a7e0a85093c95def69" region="gfx1" offset="c0000"/>
              <rom name="shiu95.bin" merge="shiu95.bin" size="262144" crc="e8f56ef5" sha1="7cb0b6bad3f0be822ef9b92e6523572e45776969" region="gfx1" offset="200000"/>
              <rom name="shiu96.bin" merge="shiu96.bin" size="262144" crc="24ed04f9" sha1="f4e91640713c0c376861652f3f0db33bff32656d" region="gfx1" offset="240000"/>
              <rom name="shiu97.bin" merge="shiu97.bin" size="262144" crc="dd7f41a9" sha1="a14a285ccc593f8f1d50b0d5574af4845a1e287e" region="gfx1" offset="280000"/>
              <rom name="shiu98.pa3" size="262144" crc="28418723" sha1="d4eef3131c82f1ecb65d6623b195c4f76010aa1b" region="gfx1" offset="2c0000"/>
              <rom name="shiu106.bin" merge="shiu106.bin" size="262144" crc="6f5bf337" sha1="5b1a0d927302c7e1727976c2d8c612a80b8f1484" region="gfx1" offset="400000"/>
              <rom name="shiu107.bin" merge="shiu107.bin" size="262144" crc="a8815dad" sha1="627d916a4b0ab03a943d123ca0eabd514634ad30" region="gfx1" offset="440000"/>
              <rom name="shiu108.bin" merge="shiu108.bin" size="262144" crc="d39685a3" sha1="84e5da34a9946b954635befd37760683850d310b" region="gfx1" offset="480000"/>
              <rom name="shiu109.pa3" size="262144" crc="58f71141" sha1="f7143bdaa7325b88e01a1d6be3aeb1d69cf0672b" region="gfx1" offset="4c0000"/>
              <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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