Sonic 2 & Knuckles not working

Discussion in 'Mega Everdrive / Everdrive MD' started by zakkman, Apr 4, 2012.

  1. zakkman

    zakkman Member

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    I have a EverDrive-MD deluxe model and I cannot get Sonic 2 & Knuckles to run, anyone have any suggestions?
     
  2. Cyantist

    Cyantist Site Supporter 2012,2013,2014,2015

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    Which Romset are you using? e.g. (U) (E) or (J) it might also be a good idea to post a link to the rom you're using.
     
  3. sdekaar

    sdekaar Rapidly Rising Member

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    yeah black screen with the classic (W) of this game.
    use the version "sonic and knuckles & sonic 2(w) [F1]"
     
    Last edited: Apr 4, 2012
  4. Lum

    Lum Officer at Arms

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    Maybe try [!] instead of [F1] if you can find it.

    Aren't Sonic 2 and Sonic & Knuckles both (W) games? I thought any region combo of original carts, should get the same checksum when locked on then dumped into roms.
     
    Last edited: Apr 4, 2012
  5. Eke

    Eke Spirited Member

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    Try to disable SRAM in Everdrive settings (though I'm not sure if it's still possible with later OS)


    Technically: S&K software will trigger the !TIME signal on cartridge port to enable the additional ROM chip present on the original cartridge when it detects Sonic 2 on the lock-on port. The merged ROM already includes this additional ROM part (it's basically S&K+S2+extra ROM concatenated to reproduce the same memory layout as original S&K cartridge with Sonic 2 cart locked in and extra ROM chip enabled) but the !TIME signal is still triggered by the original game and Everdrive might misunderstand this for SRAM activation, as it is generally used on that purpose. This would make the game read inexistant SRAM data instead of Sonic 2 data...
     
    Last edited: Apr 4, 2012
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