Namco System 2 Keycus Hacks

The files available for download on this page are intended for owners of original Namco System 2 arcade games whose keycus protection chip is faulty, so that they can be made functional again.

Thanks to Guru for hardware testing !

These files are of no use for emulation.

SystemGame nameSetTested on real hardwareFiles
Namco System 2Bubble Trouble - Golly Ghost 2 (World)bubbletr
no
Namco System 2Bubble Trouble - Golly Ghost 2 (Japan)bubbletrj
no
Namco System 2Burning Force (Japan, new)burnforc
no
Namco System 2Burning Force (Japan, old)burnforco
no
Namco System 2Cosmo Gang the Video (US)cosmogng
no
Namco System 2Cosmo Gang the Video (Japan)cosmogngj
no
Namco System 2Dirt Fox (Japan)dirtfoxj
no
Namco System 2Dragon Saber (World, DO2)dsaber
no
Namco System 2Dragon Saber (World, older)dsabera
no
Namco System 2Dragon Saber (World, Japan)dsaberj
no
Namco System 2Final Lap 2finalap2
yes (Guru)
Namco System 2Final Lap 2 (Japan)finalap2j
no
Namco System 2Final Lap 3 (World, Rev C)finalap3
yes (Guru)
Namco System 2Final Lap 3 (World, Set 2)finalap3a
no
Namco System 2Final Lap 3 (Japan)finalap3j
no
Namco System 2Final Lap 3 (Japan, Rev C)finalap3jc
no
Namco System 2Finest Hour (Japan)finehour
no
Namco System 2Golly! Ghost!gollygho
no
Namco System 2Kyuukai Douchuuki (Japan, new)kyukaidk
no
Namco System 2Kyuukai Douchuuki (Japan, old)kyukaidko
no
Namco System 2Marvel Landmarvland
no
Namco System 2Marvel Land (J)marvlandj
no
Namco System 2Mirai Ninja (Japan)mirninja
no
Namco System 2Ordyne (World)ordyne
no
Namco System 2Ordyne (Japan)ordynej
no
Namco System 2Ordyne (Japan, English Version)ordyneje
no
Namco System 2Pheliosphelios
yes (Guru, AlexUnder Base)
Namco System 2Phelios (Japan)pheliosj
no
Namco System 2Rolling Thunder 2rthun2
no
Namco System 2Rolling Thunder 2 (Japan)rthun2j
no
Namco System 2Steel Gunner 2 (US)sgunner2
no
Namco System 2Steel Gunner 2 (Japan, Rev A)sgunner2j
no
Namco System 2Suzuka 8 Hours 2 (World, Rev B)suzuk8h2
yes (Guru)
Namco System 2Suzuka 8 Hours 2 (Japan, Rev B)suzuk8h2j
no
Namco System 2Super World Stadium (Japan)sws
no
Namco System 2Super World Stadium '92 (Japan)sws92
no
Namco System 2Super World Stadium '92 Gekitouban (Japan)sws92g
no
Namco System 2Super World Stadium '93 (Japan)sws93
no
Namco System 2Valkyrie No Densetsu (Japan)valkyrie
no



 

5 Responses to Namco System 2 Keycus Hacks

  1. Avatar hokuto
    hokuto says:
    9 Aug 2021 at 6 h 05 min

    Hello, thank you for releasing the wonderful patch data.
    I tested the Valkyrie No Densetsu (Japan) on the actual machine.
    After booting, the title screen is displayed, but it resets without going to the demonstration. If you insert coins before resetting and start the game, you can play normally after that.
    This is the end of the verification result. We will test and report on other games in sequence.

    Reply
  2. Avatar hokuto
    hokuto says:
    9 Aug 2021 at 11 h 57 min

    Hello.
    Regarding the legend of Valkyrie, I confirmed another problem.
    The key custom chip of System II seems to have a function of random number generation, and it seems that the value of random numbers differs depending on the title of the game. Specifically, on the second side of the game, the ball that Arijigoku(Antlion) spits out is normally spit out like a volcano, but it is spit out in a straight line.

    Reply
  3. Avatar Runik
    Runik says:
    19 Nov 2021 at 18 h 39 min

    Hi Hokuto,

    Sorry for the late response, but somehow your comments went to the “awaiting approval” queue, and as I don’t check them regularly it went under the radar.

    Thanks for testing the file. I did a more in depth research in the file and found a keycus call that slipped through the net … I removed it, and you can download the updated file.

    Reply
  4. Avatar AlxUnderBase
    AlxUnderBase says:
    10 Jul 2023 at 19 h 18 min

    I also set english set of Phelios on real hardware . Thsnks for opportunity :

    https://youtu.be/WuleFUKmNKM

    Reply