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Thread: Neo Geo CD Conversion Project.

  1. #176

    Neo Alec's Avatar
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    Quote Originally Posted by Sly DC
    P.S. to Razoola: Will you ever make a release of the Unibios for the NGCD ?? I would be in heaven if ever you do!!
    A better project would be a bios for the Hyper Neo 64 that makes the gun and racing games boot on the fighting board. Maybe there's just one byte of data that locks it out.
    https://basementbrothers.net/

  2. #177
    Neo Bubble Buster
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    Quote Originally Posted by Sly DC
    i'm pretty sure that he doesn't know that you need to byteswap 0x66 to 0x69 with 0x6A to 0x6D. KaNyErO told me about the byteswap (and now Razoola confirms it) but KaNyErO told me it was only for some specific games like Eightman but it works with the two swapped bytes (0x66 with 0x6A)....weird huh ?!
    You need to:
    Byteswap PRG rom, append banks together.

    Swap the IRQs at 0x64 and 0x68 (DWORD values). This swaps the VBlank and HBlank IRQs.

    And change locations:
    0x40 - 00 C0 05 22 00 C0 05 28 00 C0 05 2E 00 C0 05 34
    0x50 - 00 C0 05 3A 00 C0 04 F2 00 C0 04 EC 00 C0 04 E6
    0x60 - 00 C0 E0 00


    It's cool to see someone finally figured this out. And my versions do have incorrect colors, this was pointed out by Chirs Covell.

    I guess in my excitement of getting it working, I didn't check the colors. The sprite banks probably need to be byte swapped.
    Last edited by cdoty; 12-05-2006 at 11:40 PM.
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  3. #178
    Geese's Thug
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    good to see Neo Geo CD getting "new" games, good job guys.

  4. #179
    Neo-Geo FAQs Editor NeoLord's Avatar
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    Question

    I was really excited when I read this thread, but when I clicked on the 'link' provided in his initial post, it comes up with this:

    For Sale

    Internet Domain Name

    www.Game-Shoppe.com

    For The Current Price

    CLICK HERE



    What's going on?

  5. #180
    Electric Head
    Guest

    Sorry, need help

    I'm sorry I'm posting this here (where it doesn't belong) but I have no other choice!

    I am new and I ca't open new threads, just answer in some forums, like this "News And Rumors" one.

    Anyone knows why?

    Thanks!

  6. #181
    Timid Neo Newbie

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    Talking

    Are there any people still interested in resurrecting this project? With a fresh guide and new set of tools?

  7. #182

  8. #183
    Baseball Star Hitter
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    kuk thanks. still looking for shock troopers and nightmare in the dark. thanks

  9. #184
    Morden's Lackey

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    Interesting...

  10. #185
    Neo Bubble Buster
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    Did anyone attempt to convert Flip Shot? That one is small enough that it should work (46 Megs). I always thought it was a pretty decent two-player game; it was not as good as Windjammers, but still fun.

  11. #186

    Neo Alec's Avatar
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    Quote Originally Posted by Coligion View Post
    Did anyone attempt to convert Flip Shot? That one is small enough that it should work (46 Megs). I always thought it was a pretty decent two-player game; it was not as good as Windjammers, but still fun.
    Without checking, I think the graphics or sound roms were too big.

  12. #187
    Neo Bubble Buster
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    Quote Originally Posted by Neo Alec View Post
    Without checking, I think the graphics or sound roms were too big.
    Ah, too bad. Thanks for the info., though.

  13. #188
    Dodgeball Yakuza
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    the probleme is the limitation of 4 Mo for the Graphism, you could have more but you should delete and load the new graphism (and have a loading time)

  14. #189
    Timid Neo Newbie

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    Thanks for the link kuk.

    I was hoping maybe people in the know would have the tools to appropriately scale down certain game assets for the NGCD.

    Rather than just chopping the files.

    Like King Of The Monsters, extracting the audio data and maybe checking for unused data or using techniques to shorten the audio data. So it would fit in the 1mb rather than what we have now.

  15. #190
    Krauser's Shoe Shiner
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    Quote Originally Posted by Whitesnake View Post
    Like King Of The Monsters, extracting the audio data and maybe checking for unused data or using techniques to shorten the audio data. So it would fit in the 1mb rather than what we have now.
    The NGCD has 2MB available for PCM data, not 1MB

  16. #191
    Cheng's Errand Boy

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    Quote Originally Posted by mikew View Post
    The NGCD has 2MB available for PCM data, not 1MB

  17. #192
    Dodgeball Yakuza
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    well for me it's 1 Mo or 7 Mbits
    7 Mb no more, no less. 7 shall be the number thou shalt count, and the number of the counting shall be 7. 8 shalt thou not count, neither count thou 6, excepting that thou then proceed to 7. 9 is right out. Once the number 7, being the 7 number, be reached, then lobbest thou
    Amen

  18. #193
    Krauser's Shoe Shiner
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    Quote Originally Posted by mikew View Post
    The NGCD has 2MB available for PCM data, not 1MB
    **CORRECTION**

    I want to apologize for misleading you guys here. You were correct, the NGCD does indeed only have 1MB of PCM ram. For awhile I was thinking there was 2MB but after running many tests to confirm, only 1MB of PCM ram is useable. It's setup as 2 banks of 512KB however if you are doing CD conversions it probably doesn't make any difference as you would be loading all of the data from one entry starting at 0x0 in the IPL.TXT.

  19. #194
    Loyal Neo-Disciple
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    Bump!

    I was testing Eight Man and it's sad that it has some missing sfx that glitch out into an annoying beep. I was wondering if I could hack the Z80 program to ignore playback of out-of-memory samples... but for that I'd have to know an emulator that lets me set breakpoints on the REG_SOUND port in the z80 side, and let me step through code. Anyone has any recommendations? I could work in the weekend on this project.

    EDIT: Seems like Mame has an OK debugger and Neo-Geo CD(Z) support, but I need to brush up on the z80 neo docs first.

    EDIT 2: I have disassembled a bit of the Z80 code but it seems like it's not gonna be easy to do my original plan in a straightforward way. Seems like 68000 commands get translated in some odd way with a table on $4C4C, which does not correspond to actual track code numbers (like the Unibios jukebox codes). I changed ONE entry to 00 and that was enough to wreck havoc in the music side of the game to hilarious results.

    I'll see if I can go deeper into the driver (Makoto 2.0A) and figure out how it works but it seems to me it might be too much effort for little payoff. Dunno if I should give up yet.
    Last edited by Burning Fight!!; 07-13-2020 at 11:25 PM.
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  20. #195
    King's Dry Cleaner

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    I'd love to see ganryu converted but have no clue about its possibility.

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