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Sonic 1 32x / Sonic32

Discussion in 'Engineering & Reverse Engineering' started by drx, Aug 31, 2008.

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  1. Aug 31, 2008 #41
    shobiz

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    No, it's 320x224. The blue lines are cos the emulator window is 320x240, and so the display is letterboxed.
     
  2. Aug 31, 2008 #42
    Moogle!

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    No, it'll do this on a TV too, it's just no normally visible. Those lines will change color too, from light blue on GHZ, Dark blue on MZ, Purple on SYZ, ect.
     
  3. Aug 31, 2008 #43
    shobiz

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    It's called the overscan area, and the colour displayed in it is the backdrop colour. Sonic 1 sets the backdrop colour to colour 0 of the 3rd palette line, so since this colour changes from level to level so does the colour displayed in the overscan area. The actual display area is 320x224, though.
     
  4. Aug 31, 2008 #44
    Techokami

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    I believe Stealth made such a port, much akin to his S1GBA port. Might be on the wiki somewhere.
     
  5. Aug 31, 2008 #45
    shobiz

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    Sonic for MegaCD
     
  6. Aug 31, 2008 #46
    muteKi

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    The mode to me seems designed mostly for the sake of creating something like the animated sequences in Sonic CD. I would guess, though, that they could easily take up a lot of space in the ROM.

    Still, it would be an interesting mode to use for a special stage.
     
  7. Aug 31, 2008 #47
    drx

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    The full color mode graphics take 2 times as much space as pallete-based graphics (each pixel is 2 bytes as opposed to 1 byte).

    But I bet they nicely compress with a modified version of PNG or something similar.
     
  8. Aug 31, 2008 #48
    Overlord

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    Yeah, for resolution issues just make the border black, like Sonic 3 & Knuckles does in PAL:

    Top of frame starts
    [​IMG]
    Bottom of frame ends

    Makes it look like a widescreen movie on a 4:3 TV, so not jarring. It's not like the random-colours that S1/2 do.

    EDIT: CURSE YOU THIS POST FOR BEING ON THE BLACK BG OF THE SKIN D:
     
  9. Aug 31, 2008 #49
    Flygon

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    Actually, it looks Olive to me.
     
  10. Aug 31, 2008 #50
    Phos

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    I'm guessing that he's using a different number of posts per page.

    And for the massive increase in colors, 20 vertical pixels is a small price to pay.
     
  11. Sep 1, 2008 #51
    Hivebrain

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    Interesting stuff. Are you going to add extra content like spindash, or just enhanced existing content?
     
  12. Sep 1, 2008 #52
    SaviourDCX

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    Haha, I can see it now, nothing but good can came out of this! Having the extra processing power should be able to allow more moving objects on the screen without the lag? Great to hear about the ability to put in real WAV like music to, I guess that'll be great for when making remixes of old school game music combined with other instruments. :argh:
     
  13. Sep 1, 2008 #53
    drx

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    I don't know yet. This might be a good idea, but only if you can opt out (SPINDASH EQU 0).
     
  14. Sep 1, 2008 #54
    TmEE

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    The latest releases don't work well on real HW, the Sonic1.32X just crashes and has input issues, and Sonic32.32X locks up on the Sega logo, and no PWM.

    and Qsound is not part of 32X (or MCD) hardware, its just a method of (pre)processing the wave data...
     
  15. Sep 1, 2008 #55
    drx

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    This is because MD code requests acknowledgement of commands issued to the SH2. If I removed this, it would play normally, just without PWM. But since it's a 32x ROM, what's the point anyway :P I hope to fix this later but I don't have a 32x unfortunately.
     
  16. Sep 1, 2008 #56
    Qjimbo

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    I assumed TmEE meant he played it on a 32x with a tototek cart or similar?
     
  17. Sep 1, 2008 #57
    Mad Echidna

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    Thanks for postsing the source man! This will be a great base for future hacks.
     
  18. Sep 2, 2008 #58
    TmEE

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    T-04YBSC-A !
  19. Sep 2, 2008 #59
    Oerg866

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    That Flashcart is pretty hot :(
     
  20. Sep 2, 2008 #60
    SoullessSentinel

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    Sonic 1 on the 32x, I'm looking forward to see what people can acheive with the assistance of the extra hardware within the 32x.

    Also, that flashcart is pretty good, any chance of schematics? I'd be interested in building one of these myself.
     
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