OS v8

Discussion in 'Mega Everdrive / Everdrive MD' started by KRIKzz, Jun 24, 2010.

  1. link83

    link83 Enthusiastic Member

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    #21
  2. raylyd

    raylyd Guest

    i will make a youtube video how to update via sd card take care guys i will do it soon as i can
     
    #22
  3. KRIKzz

    KRIKzz Well Known Member

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    we talking about firmware update (not OS)
     
    #23
  4. mdmx

    mdmx Familiar Face

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    Hi,
    that's very nice. A small and easy to use tool would be helpful.
     
    Last edited: Jul 19, 2010
    #24
  5. Cyantist

    Cyantist Site Supporter 2012,2013,2014,2015

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    I have just one question about the Everdrive. Does it go in any Mega Drive? for example i wont need to mod one ?
     
    #25
  6. KRIKzz

    KRIKzz Well Known Member

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    everdrive will be work on any original megadrive/genesis except genesis3
     
    #26
  7. raylyd

    raylyd Guest

    Can i ask why wont it work in a genesis 3 ?
     
    #27
  8. KRIKzz

    KRIKzz Well Known Member

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    i think that some signals is unconnected to cart port on genesis3 (cpu clock or/and !time).
    BTW: currently i create new firmware for provide compatibility with genesis3 and firecore clones
     
    #28
  9. Eke

    Eke Spirited Member

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    Some suggestions for next OS:

    (1) having an option to force the game mode (SMS, SMD) for unlicensed programs that do not have correct "SEGA" or "TMS SEGA" string in ROM header.

    (2) having an option so that OS does not initialize / reset Z80 (RAM, registers,...) on startup: this is essentially for testing purpose, to see the initial state of Z80 on various models using a dedicated test program.

    (3) when Z80 initialization is enabled, initialize SP register to $DFF0: this is indeed required by some SMS games that expect this register to be initialized by SMS BIOS.

    Thank you
     
    Last edited: Aug 11, 2010
    #29
  10. KRIKzz

    KRIKzz Well Known Member

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    i think than i can implement all it in new OS. hope that SP register init can help for some SMS games like "addams famely"
     
    #30
  11. KRIKzz

    KRIKzz Well Known Member

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    only firmware (non os) may provide support with genesis3 and firecore
     
    #31
  12. KRIKzz

    KRIKzz Well Known Member

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    latest firmware still not supported with genesis3, so you even can't run megadrive games on genesis3.
    about genesis3 and sms: as far as i know genesis3 incompatible with SMS mode, even if you will use official power base converter. some hardware modiffication need for enable compatibility with sms mode on genesis3
     
    #32
  13. eightbit

    eightbit Active Member

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  14. KRIKzz

    KRIKzz Well Known Member

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    yes, it will work
    also you need BH-10R plug, like this
     
    Last edited: Sep 8, 2010
    #34
  15. scottzane

    scottzane Rising Member

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    #35
  16. rat_king

    rat_king Newly Registered

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    Hello,

    In order to get a Model 3 VA2 (ASIC 315-6123) to work with the Everdrive you have to do the Virtual Racing fix.

    -Bridge pins B16 and B26 on the cartridge slot
    -Solder pin B19 to the side of solder spot C42 closest to the ASIC
     
    #36

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