Hacking for VGMs

by **ValleyBell** » Sat Jul 11, 2020 5:17 pm

Mickey's Ultimate Challenge, for helping Jason Ee with his pack:

Code: Select all: 007A57 song ID for title screen (default: 09h)

verified BGM numbers are 01h..0Dh, the GEMS sequence file contains 80h songs in total

Make the game stay on the title screen forever (overwrite existing bytes):

Code: Select all: offset byte code ASM code comment ------ --------- -------- ------- 007B8C 4EB8 05A6 JSR $0005A6.w ; wait for VSync 007B90 60FA BRA.S *-4 ; and do that forever

Additional patches for quick screen fading (i.e. less annoyance when booting the ROM)

Code: Select all: 00712A 6A00 -> 6000 ; SEGA screen 00786C 6A00 -> 6000 ; Copyright screen 007926 6A00 -> 6000 ; Hi Tech Expressions screen 007A02 6A00 -> 6000 ; Designer Software screen

by **The789Guy** » Sun Sep 27, 2020 4:27 pm

Does anyone have/know any Game Genie or PAR music modifier codes for Kawasaki Superbike Challenge? I was able to rip the main menu and options themes, but I still need to rip the race results theme, and there might be some unused songs.

by **The789Guy** » Wed Sep 30, 2020 10:22 pm

ClayFighter (U) [!]

Interplay logo music / sound effect / DAC/PCM sample modifier:

000B36:4475
000B2C:00??

by **ValleyBell** » Tue Oct 20, 2020 3:58 pm

Patch to disable the menu screen timer in Death and Return of Superman, The (U):

Code: Select all: 003FD6 536D -> 382D ; disable timer 012BDF 32 -> 00 ; skip the copyright screen (which can't be skipped otherwise)

The timer is located at address FF9540 (in 68k RAM) and it used for all screens, it seems.

by **The789Guy** » Tue Oct 20, 2020 3:59 pm

Dude, thanks.

by **ValleyBell** » Tue Nov 03, 2020 3:56 pm

Kawasaki Superbike Challenge

With a PAR code, you can easily rip songs from the menu screen.

so to the Game Options menu
turn the music off
edit RAM address FFE8CF to the song you want to play
turn the music on -> it will play the song ID from FFE8CF

The "PlaySong" function is located at ROM offset 0DFE4C.

Adventures of Rocky and Bullwinkle and Friends, The

You can patch the ROM to play a certain song at the SEGA screen.

Code: Select all: 03C29E 05 A4 -> 00 02 ; ignore bad ROM checksum 04C0F7 03 -> xx ; where xx = sound IF 068B9C 6A -> 60 ; make it freeze on the SEGA screen

The "PlaySong" function is located at ROM offset 05618A.

by **The789Guy** » Tue Nov 03, 2020 4:12 pm

To simplify:

PAR code FFE8CF -- play song code.

With GEMSPlay, I found out that 00 and 05 are the song codes.

Website · by **nensondubois** » Tue Jul 13, 2021 10:12 am

Waterworld (E) (Prototype).gen
Title screen music modifier
0013B4:70??
Unused songs: 02, 03, 04, 05, 0B

by **ValleyBell** » Sat May 14, 2022 1:46 pm

Newman-Haas Indy Car Racing

General ROM locations:

Code: Select all: StopMusic: 070000 PlayMusic: 070004 (Register D0 = sound ID) UpdateMusic: 070008 LoadZ80Driver: 07000C SilencePSG: 070014 UpdateSFX: 07001C StopSFX: 070028 DoCarEngineSFX: 070030 Music Pointer Lists: 07173C (20h bytes per song, 6 songs) Sound RAM: FF8400

You can play a song on the title screen by applying the following patch:

Code: Select all: offset hex bytes ASM code description 1C8C72 4E71 NOP ; skip SEGA screen 1CA4B6 4E71 NOP ; skip license screen 1C8A8E 4E71 NOP ; skip Aklaim screen 1C018E 303C 00xx MOVE.W #xx, D0 ; set song ID to play (0..5) 1C01A0 60FE BRA * ; freeze game after starting the song (to prevent screen changes etc.)

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