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maydayb: MAME ROM Information.


Mayday!! (c) 1981 Hoei.


Main CPU : M6809 (@ 1 Mhz)

Sound CPU : M6808 (@ 894.75 Khz)

Sound Chips : DAC

Screen orientation : Horizontal

Video resolution : 294 x 239 pixels

Screen refresh : 60.00 Hz

Palette colors : 16

Players : 2

Control : 8-way joystick

Buttons : 3


Williams considered this game to be an 'infringement' on their copyright of Defender which led to the halting of Mayday!!'s production.

Default highscore table :

1 MIT 20000

2 NOB 15000

3 NUN 10000

4 HON 7000

5 IKU 5000

Dwayne Richard holds the official record for this game with 6,235,300 points.


Game's rom.

Machine's picture.

MAME Info:

0.36b7 [Aaron Giles]

0.34b6 [?]


- 0.95u3: Changed visible area to 294x239 and a cpu1 rom address to $16000 in Mayday.

- 0.88: Stefan Jokisch fixed Mayday inputs. Changed input from 5 to 3 buttons with 2x coin slots.

- 0.76u2: Removed 6th button.

- 0.58: Added clone Mayday (set 3).

- 0.57: Removed 3rd coin slot.

- 0.36b8: Changed description to 'Mayday (set 1)' and clone '(alternate)' to '(set 2)'. Added missing cpu1 rom ($12000) to clone (set 2).

- 0.36b7: Aaron Giles added Mayday (Hoei 1980) and clone (alternate).

- 7th October 1999: Aaron Giles added Mayday to the Williams driver.

- 0.34b6: Added MayDay (Testdriver) and clone (Alternate) (Testdriver).

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Romset: 30 kb / 8 files / 21.3 zip

MAME XML Output:

       <game name="maydayb" sourcefile="williams.c" cloneof="mayday" romof="mayday">
              <description>Mayday (set 3)</description>
              <rom name="ic03-3.bin" merge="ic03-3.bin" size="4096" crc="a1ff6e62" sha1="c3c60ce94c6bdc4b07e45f386eff9a4aa4816953" region="maincpu" offset="d000"/>
              <rom name="ic02-2.bin" merge="ic02-2.bin" size="4096" crc="62183aea" sha1="3843fe055ab6d3bb5a3362f57a63ce99e36cec47" region="maincpu" offset="e000"/>
              <rom name="ic01-1.bin" merge="ic01-1.bin" size="4096" crc="5dcb113f" sha1="c41d671c336c68824771b7c4f0ffce39f1b6cd62" region="maincpu" offset="f000"/>
              <rom name="rom7.bin" size="4096" crc="0c3ca687" sha1="a83f17c20f5767f092300266dd494bd0abf267bb" region="maincpu" offset="10000"/>
              <rom name="ic05-5.bin" merge="ic05-5.bin" size="4096" crc="0d797a3e" sha1="289d2ecfebd7d71430d6624f3c9fbc91f9ef05cc" region="maincpu" offset="11000"/>
              <rom name="ic06-6.bin" merge="ic06-6.bin" size="4096" crc="ee8bfcd6" sha1="f68c44fdc18d57070aea604e261fb7b9407345a2" region="maincpu" offset="12000"/>
              <rom name="ic07-7d.bin" merge="ic07-7d.bin" size="4096" crc="d9c065e7" sha1="ceeb58d1dfe14106271f17cf1c689b812216c3c0" region="maincpu" offset="16000"/>
              <rom name="ic28-8.bin" merge="ic28-8.bin" size="2048" crc="fefd5b48" sha1="ceb0d18483f0691978c604db94417e6941ad7ff2" region="soundcpu" offset="f800"/>
              <rom name="rom11.bin" size="2048" crc="7e113979" sha1="ac908afb6aa756fc4db1ffddbd3688aa07080693" region="user1" offset="0"/>
              <rom name="rom12.bin" size="2048" crc="a562c506" sha1="a0bae41732f05caa80b9c13fba6ae4f01647e680" region="user1" offset="800"/>
              <rom name="rom6a.bin" size="2048" crc="8e4e981f" sha1="685c1fca9373f4129c7c6b86f18900a1bd324019" region="user1" offset="1000"/>
              <rom name="rom8-sos.bin" size="2048" crc="6a9b383f" sha1="10e71a3bb9492b6c34ff06760dd55c442611ca75" region="user1" offset="1800"/>
              <chip type="cpu" tag="maincpu" name="M6809" clock="1000000"/>
              <chip type="cpu" tag="soundcpu" name="M6808" clock="3579545"/>
              <chip type="audio" tag="mono" name="Speaker"/>
              <chip type="audio" tag="wmsdac" name="DAC"/>
              <display tag="screen" type="raster" rotate="0" width="294" height="238" refresh="60.096154" pixclock="8000000" htotal="512" hbend="10" hbstart="304" vtotal="260" vbend="7" vbstart="245" />
              <sound channels="1"/>
              <input players="1" buttons="3" coins="2">
                     <control type="joy" ways="5 (half8)"/>
              <driver status="good" emulation="good" color="good" sound="good" graphic="good" savestate="supported" palettesize="0"/>

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