don't click here

"SEGA music joystick demo"

Discussion in 'General Sega Discussion' started by ICEknight, Mar 17, 2012.

  1. ICEknight


    Researcher Researcher
    This ROM has been floating around the internet for a while, but I don't think anybody knows about its origin or real purpose yet...

    In any case, the only actual interesting thing about it is that it shows the input from the two 3-button controllers, plus another one plugged into the "EXT" port. Does anybody know if it actually reads input from the modem, or a hypothetical dev unit... or anything at all?
  2. Andlabs


    「いっきまーす」 Wiki Sysop
    Writing my own MD/Genesis sound driver :D
    This ROM appears to use a text font found in a lot of Japanese games (in general) but GoodGen claims it's from America? It seems to do some quirky things, like use HInt and VInt as the same function and put a nop before writing SEGA to $A14000... I'm not sure

    There are two RAM integrity tests that run at startup (code starts at $10AE and $10F2; the latter is a subroutine and also checks VRAM integrity); use 10D6:4E71 to get a red screen that plays some sort of PSG noise sfx over and over

    I find it funny the 1991 ROM is using Space Harrier II music

    Finally we have the title fields:
    Code (Text):
    1. ROM:00000120 aOtsujiInitiali:dc.b 'OTSUJI INITIALIZE                               '
    2. ROM:00000150 aKogaInitialize:dc.b 'KOGA INITIALIZE                                 '
    What do they mean? Google Translate isn't giving me anything meaningful...

    I could try looking for more things inside this later