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Thread: Complete list of New Sega Genesis Games and Ports

  1. #241
    Raging in the Streets Sik's Avatar
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    Quote Originally Posted by Wesker View Post
    Never mind, I already solved it. It was a problem with an unstable firmware of Mega Everdrive v1 (very outdated, I know, I plan to solve this soon).

    I realized this because I was having similar problems with the new builds of the G-Zero and Shinobi homebrews and even with the Akira prototype, testing all of them both with my Mega Drive 1 and my Sega Nomad, so there was definitely something wrong not with my setup but with the flashcart.
    I think I know what's up.

    It's a hardware bug that sometimes results in glitched graphics in some console revisions, but for some reason mega Everdrive X1 is particularly susceptible to it and will result in memory corruption instead (and eventually crashes where it made absolutely no sense). I know this because somebody consistently got it to happen in the Arkagis demo when I implemented the guard backwards (whoops) and completely stopped after I fixed that.

    Sega required the guard to be implemented on released games, but it's very easy to overlook in homebrew (most setups aren't affected) and I can see early prototypes also not having implemented that stuff properly yet.

  2. #242
    WCPO Agent CrossBow's Avatar
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    Quote Originally Posted by roce View Post
    archive.org may have the old page.
    Yeap, that is what I ultimately ended up doing to get all the old profile parameters. However, it made things worse when I went back to .84. I couldn't get a stable picture on Metal Blast at all under .84 so the game definitely does something odd when it switches to the 320 mode it uses. Also I couldn't get a picture at all on sonic2 2-player mode....sigh. Don't recall having these many issues before and I know the Sonic2 2-player mode used to work fine. I've gone back to .85 where some additional tweaks to Firebrandx's 320 Genesis mode, I was able to get Metal Blast looking really good using 4x mode without phasing issues or ghosting. But still nothing on the sonic 2-player mode. Oh well, I never play sonic 2 in that mode anyway so I will leave it as it is for now.

    And now I feel bad for this thread getting off kilter and didn't really mean for it too.

  3. #243
    Hedgehog-in-Training Hedgehog-in-TrainingRoad Rasher
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    @Sik
    Just curious, what guard exactly?

  4. #244
    Raging in the Streets Sik's Avatar
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    OK I finally got my laptop back so I can type long posts again without much trouble.

    In short: you need to keep the Z80 away from the 68000 bus when you start a DMA. The obvious way is to stop the Z80 before starting the DMA, though you can try being smarter (see: XGM). The problem is that if the Z80 and DMA try to get on the 68000 bus at the same time, the bus signals get screwy. On most consoles this isn't a problem with discrete cartridges, but on a few consoles (especially early revisions) you get glitched graphics.

    Now, Mega Everdrive X1 seems to be unusually susceptible to this problem (probably due to the way DRAM refresh is implemented not something trivial when you can't get the CPU away from the bus). Basically, the DRAM refresh seems to go bonkers when this happens and the cartridge memory is corrupted, which eventually leads to crashes since, well, the game is corrupted. This happens even on consoles that usually don't show problems (since the signals are still screwy, just to different degrees of tolerance).

    Later Mega Everdrive models seem to be more resistant to this hardware bug (albeit the glitched graphics issue for some consoles will still be present). Not sure how well Mega SD handles this. In any case it's something you should guard against, since it causes some trouble even on discrete cartridges with some consoles.

  5. #245
    Hedgehog-in-Training Hedgehog-in-TrainingSports Talker nemezes's Avatar
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    new shooter game coming for mega drive: telethugs.

    it is a port of a PC game (here is the place to download the pc game https://pedro-paiva.itch.io/telethugs).

    it is not 100% equal of the original game.

    2 players game; 4 characters; 4 stages; 4 bosses; 1 ending; options to choose hearts (1-5) and lives (1-9).

    preview:


    the main gameplay is done. needs just to add music and some small details.

  6. #246
    Outrunner EPSYLON EAGLE's Avatar
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    Quote Originally Posted by nemezes View Post
    new shooter game coming for mega drive: telethugs.

    it is a port of a PC game (here is the place to download the pc game https://pedro-paiva.itch.io/telethugs).

    it is not 100% equal of the original game.

    2 players game; 4 characters; 4 stages; 4 bosses; 1 ending; options to choose hearts (1-5) and lives (1-9).

    preview:


    the main gameplay is done. needs just to add music and some small details.
    Seems a fun game! Congratulations you really is a very prolific developer!

  7. #247
    Outrunner maxi's Avatar
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    New game with demo to download:
    https://kivutaro.itch.io/shrine-maiden-shizuka





    Looks good so far and a hint for those who play the rom, don't jump to the other side of the big hole shortly after the start point, there's no screen there yet and the game will freeze.

  8. #248
    Hedgehog-in-Training Hedgehog-in-TrainingWildside Expert bertodecosta's Avatar
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  9. #249
    Hedgehog-in-Training Hedgehog-in-TrainingWildside Expert bertodecosta's Avatar
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    Question for Nemezes
    I read this release in my facebook timeline
    "Balaio de Jogos" which contains four of your games
    Is this a legit release with your pemission or just a repro?



    Source : https://www.facebook.com/RetroXeletronics/

  10. #250
    Outrunner Raistlin's Avatar
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    Quote Originally Posted by bertodecosta View Post
    Question for Nemezes
    I read this release in my facebook timeline
    "Balaio de Jogos" which contains four of your games
    Is this a legit release with your pemission or just a repro?



    Source : https://www.facebook.com/RetroXeletronics/
    As I was informed about this release by Nemezes himself I can say this is a legit release.

  11. #251
    Hedgehog-in-Training Hedgehog-in-TrainingWildside Expert bertodecosta's Avatar
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    Quote Originally Posted by Raistlin View Post
    As I was informed about this release by Nemezes himself I can say this is a legit release.
    I see, good then. Thanks for your information.

  12. #252
    Hedgehog-in-Training Hedgehog-in-TrainingSports Talker nemezes's Avatar
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    Quote Originally Posted by bertodecosta View Post
    Question for Nemezes
    I read this release in my facebook timeline
    "Balaio de Jogos" which contains four of your games
    Is this a legit release with your pemission or just a repro?



    Source : https://www.facebook.com/RetroXeletronics/
    This is legit.

    Pack of game that I programmed and got help of friends.

    Odeio carros, original game by Pedro Paiva
    http://patreon.com/menosplaystation

    Mutuca art and music by amaweks
    http://www.twitter.com/amaweks

  13. #253
    WaterMelon Road Rasher XGoldenboyX's Avatar
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    Megadrive Demon Of Asteborg

    Hi guys, not sure if this has been posted but here is another new Sega genesis game in the making.

    Demon Of Asteborg ( 2020 )

    Twitter https://twitter.com/DAsteborg

    Check out this latest Update https://twitter.com/XLuis__MartinsX/...632104449?s=20

    Demons Of Asteborg Twitter Post.jpg
    Last edited by XGoldenboyX; 02-19-2020 at 04:46 PM.

  14. #254
    Master of Shinobi
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    Quote Originally Posted by XGoldenboyX View Post
    Hi guys, not sure if this has been posted but here is another new Sega genesis game in the making.

    Demon Of Asteborg ( 2020 )

    Twitter https://twitter.com/DAsteborg

    Check out this latest Update https://twitter.com/XLuis__MartinsX/...632104449?s=20

    Demons Of Asteborg Twitter Post.jpg
    The Demo looks and plays promising.

    Here's Yazzie16
    https://img.itch.zone/aW1hZ2UvNTkzNT...500/qLiRQ1.png
    https://retrosouls.itch.io/yazzie16bit
    Lists of MD games: officially licensed (~925) @ cartridge sizes @ Top 5 @ Top 250 (controversial) @ Sonic hacks @ best title screens @ Arcade ports (150) @ best European

  15. #255
    Hedgehog-in-Training Hedgehog-in-TrainingSports Talker nemezes's Avatar
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    Now you can buy the full digital ROM of Devwill Too. http://devwilltoo.mangangateam.com

    Here you can find more info about Devwill Too: http://www.mangangateam.com/devwill-en


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