plusalph Plus Alpha

Immagine gioco: Plus Alpha
Available images:

Romset name:
Production year: 1989
Manufacturer: Jaleco

Game genre: Shooter
Category: Shooter / Flying Vertical

This machine works in MAME This machine works in MAME

Overall emulation: Good
Color emulation: Good
Sound emulation: Good
Graphics emulation: Good
Save states: Supported

In MAME since version: .036b07

The MAME driver of this machine is: megasys1.cpp - Read the code

 Tech info 
 Hardware of this machine:
  • CHIPs [Show details]

    M68000 ("maincpu")cpu 6000000 Hz
    M68000 ("audiocpu")cpu 7000000 Hz
    Speaker ("lspeaker")audio
    Speaker ("rspeaker")audio
    YM2151 ("ymsnd")audio 3500000 Hz
    OKI6295 ("oki1")audio 4000000 Hz
    OKI6295 ("oki2")audio 4000000 Hz

  • Screens [Show details]

    This machine uses a single screen:
      Graphic type: Raster
      Screen orientation: Vertical
      Resolution 256 x 224 @ 56.191350 Hz

  • Number of players: 2P Alternated
  • Controllers [Show details]

      Joystick [8 ways]
      Joystick [8 ways]
    Number of buttons: 2

  • Dip-switches [Show details]

    Default settings in bold
     Infinite (Cheat)
    Hyper Laser Beams2
    Bonus Life70k and every 200k
     100k and 300k Only
    Flip ScreenOff
    Coin A3 Coins/1 Credit
     2 Coins/1 Credit
     1 Coin/1 Credit
     1 Coin/2 Credits
     1 Coin/3 Credits
     1 Coin/4 Credits
     1 Coin/5 Credits
     Free Play
    Coin B4 Coins/1 Credit
     3 Coins/1 Credit
     2 Coins/1 Credit
     1 Coin/1 Credit
     1 Coin/2 Credits
     1 Coin/3 Credits
     1 Coin/4 Credits
     1 Coin/5 Credits
    Demo SoundsOff
    Freeze Screen (Cheat)Off

  • ROMs (24 of the machine set) [Show details]

    Referred to MAME version: 0.181

    NameSizeCRC32SHA1StatusIn romset
    pa-rom2.bin13107233244799 686fb7fa8a6c25b5aff78bc509f35c69492d7d1e good plusalph
    pa-rom1.bin131072a32fdcae c2315a7142e5499e9325f5a8361cb25e83747a3e good plusalph
    pa-rom3.bin655361b739835 3aaa9545a7f578a9775311dcd44504870f3b1544 good plusalph
    pa-rom4.bin65536ff760e80 dd06306a516a2d5e49cf8f2343ddc26405b309a9 good plusalph
    pa-rom5.bin65536ddc2739b dee31660428baea44c73dec238ed7f39a6771fe6 good plusalph
    pa-rom6.bin65536f6f8a167 60d5c9db18d8f6704b68ccde5d026174679cec36 good plusalph
    m507474096  nodump plusalph
    pa-rom11.bin131072eb709ae7 434c9da3c79a97ddd9be77908ce65e9efe6c8106 good plusalph
    pa-rom12.bin131072cacbc350 328094a5d067775871f7d69b4c20c40e46b0eaba good plusalph
    pa-rom13.bin131072fad093dd 98a42f91d66b990e18f845edc01c23568cbc7a83 good plusalph
    pa-rom14.bin131072d3676cd1 b805216af1a65c2f19a82aaf3775bbbceb065c7e good plusalph
    pa-rom15.bin1310728787735b 9083061ce6de98a611558fc59d1ec37aefc2a2e0 good plusalph
    pa-rom16.bin131072a06b813b de4fb0f92f9178c2b5f2750d17cfc3da126b23a4 good plusalph
    pa-rom17.bin131072c6b38a4b 2529ee47324edcdf4cd34c159524f37da08e1099 good plusalph
    pa-rom19.bin6553639ef193c 93f417a36732ca76d566f2ff2c9ff62e5679da08 good plusalph
    pa-rom20.bin13107286c557a8 a6dfb2aeda07639448a4135d1336019214030fc9 good plusalph
    pa-rom21.bin13107281140a88 f31ae208623bdb152888e1ebdd2515f9bcc2fb44 good plusalph
    pa-rom22.bin13107297e39886 89161ae647c835ff24fcb8676f6e1228f9a1fa10 good plusalph
    pa-rom23.bin1310720383fb65 31fa9c9ba57bf3c9ee8e3f5b1b4e28c1a3591a4b good plusalph
    pa-rom9.bin131072065364bd bacb268b1c76c286e89eb823d8c3477ec5f2516c good plusalph
    pa-rom10.bin131072395df3b2 6f69b573e997ba4bb5aabf745843921f0866d209 good plusalph
    pa-rom7.bin1310729f5d800e c0a7bdedc8a1294b8d29f7f6007542ea006e70cb good plusalph
    pa-rom8.bin131072ae007750 b48784fd6bcf205296e3e5b59c258f76da5c2d1b good plusalph
    prom.14m5121d877538 a5be0dc65dcfc36fbba10d1fddbe155e24b6122f good plusalph

    :  PARENT Machine
    :  CLONE Machine
    :  BIOS
    :  Device


Plus Alpha (c) 1989 Jaleco.


Jaleco Mega System 1-A hardware

Main CPU : 68000 (@ 12 Mhz)

Sound CPU : 68000 (@ 7 Mhz)

Sound Chips : YM2151 (@ 3.5 Mhz), (2x) OKI6295 (@ 30.303 Khz)

Players : 2

Control : 8-way joystick

Buttons : 2


Released in June 1989 in Japan.

Pony Canyon / Scitron released a limited-edition soundtrack album for this game (Plus Alpha - PCCB-00015) on 15/12/1989.


Main programmer : Papa Sekiya

Character programmer : Motoko

Special programmer : Yuma Yoshida

Main character designer : Rolling.N

Character designers : Otappie Etoh, U. Keijiro

Main scroll designer : Nekomasa

Scroll designers : Markun!, Otatuku

Opening designer : Nekomasa

Present designer : Markun! Takahashi

Ending designer : Otatuku Etoh

Sound : Tsukasa Tawada

Voice actress : Eppin Honda

Sound programmer : Panic Yunma

Game designer : Momonga


Game's rom.

Giochi Simili

Warning: information in history.dat can differ from the ones present in the rest of the page (taken from MAME) as they come from a different source

Information on plusalph

0.36b7 [Luca Elia]

0.35b4 [Luca Elia]


- 0.143u6: Angelo Salese added preliminary MCU handshake simulation sequence for Plus Alpha and removed ROM patches.

- 0.36b14: Changed 68000 CPU1 clock speed from 7MHz to 12MHz.

- 0.36b7: Luca Elia added Plus Alpha (Jaleco 1989).

- 8th October 1999: Luca Elia sent in a huge Mega System 1 update with many fixes and new drivers for Chimera Beast, Iga Ninjyutsuden, Plus Alpha and Peek-a-Boo.

- 0.35b4: Luca Elia added Plus Alpha (Testdriver).


Other Emulators:

* Raine

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