Super Mario Land 1.0 Jump maximum running height while standing 009-E6B-E62 Jump as high as you want; press A to descend (you will die if you jump too high off the screen) 179-67B-802 Super Mario Land 1.1 Jump maximum running height while standing 009-E6B-E62 Jump as high as you want; press A to descend (you will die if you jump too high off the screen) 179-67B-802
Game & Watch Gallery 2 .gbc Modern Helmet Always play as Wario in GB/SGB mode (Short version) AE8-A6A-5D4 Always play as Wario in GBC mode (Short version) AE6-D1A-5D4
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Super Game Boy 1 and 2
Enable unfinished unused SNES OBJ_TRN mode
7E0F0601
To toggle this in any game at any time, use the following DATA_SND commands:
79060F007E0100000000000000000000 - Enable OBJ_TRN mode
79060F007E0000000000000000000000 - Disable OBJ_TRN mode
OBJ_TRN
Code 18 OBJ_TRN. Object Transfer. Command C1. Used to display up to 24 entries of scrollable 8×8 or 16×16 SNES Objects on the screen, comprising a total onscreen palette of 256. Real Bout Special Fatal Fury and Bomberman Quest call OBJ_TRN even though neither game loads data into the SNES VRAM.
The official NOA/NOE Super Game Boy programming document actually defines OBJ_TRN as "Use prohibited", and the function is not explained anywhere because it was unfinished. Practically useful for title screens and cutscenes since the bottommost of the Game Boy screen would be used to transfer object data as well. Here are the unused OBJ_TRN caveats.
{pandocs}
Byte: Setting:
0 Command*8+Length (fixed length=1)
1 Control Bits
Bit 0 - SNES OBJ Mode enable (0=Cancel, 1=Enable)
Bit 1 - Change OBJ Colour (0=No, 1=Use definitions below)
Bit 2-7 - Not used (zero)
2-3 System Colour Palette Number for OBJ Palette 4 (0-511)
4-5 System Colour Palette Number for OBJ Palette 5 (0-511)
6-7 System Colour Palette Number for OBJ Palette 6 (0-511)
8-9 System Colour Palette Number for OBJ Palette 7 (0-511)
Palette entrees are ignored if above Control Bit 1 is zero.
Because each OBJ palette consists of 16 coluors, four system
palette entries (of 4 colours each) are transferred into each
OBJ palette. Specific system palette numbers are not required to be
aligned to a multiple of four, and will wrap to palette number
0 when exceeding 511. For example, a value of 511 would copy
system palettes 511, 0, 1, 2 to the SNES OBJ palette.
A-F Not used (zero)
The recommended method is to "display" Game Boy BG tiles from F9h-FFh left to right as the first 7 characters of the bottom-most character line of the Game Boy screen. As for normal 4KByte VRAM transfers, this area should not be scrolled, should not be overlapped by Game Boy OBJs, and the Game Boy GBP palette register should be set up to avoid conflicting with the normal in-game palettes. SNES OAM data can be defined in the 70h bytes of the Game Boy BG tile memory at following addresses:
8F90-8FEF SNES OAM, 24 Entries of 4 bytes each (96 bytes)
8FF0-8FF5 SNES OAM MSBs, 24 Entries of 2 bits each (6 bytes)
8FF6-8FFF Not used, don't care (10 bytes)
The format of SNES OAM Entrees are:
Byte 0 OBJ X-Position (0-511, MSB is separately stored, see below)
Byte 1 OBJ Y-Position (0-255)
Byte 2-3 Attributes (16bit)
Bit 0-8 Tile Number (use only 00h-FFh, upper bit zero)
Bit 9-11 Palette Number (use only 4-7)
Bit 12-13 OBJ Priority (use only 3)
Bit 14 X-Flip (0=Normal, 1=Mirror horizontally)
Bit 15 Y-Flip (0=Normal, 1=Mirror vertically)
END OF NOTES
POST COMMENT:
The format of SNES OAM MSB Entrees are unknown. However, 2 bits are used per entry: One bit is the most significant bit of the OBJ X-Position. The other bit specifies the OBJ size (8×8 or 16×16 pixels).
well I finally found out how to activate this elusive function, or what was finished... well, that's not entirely true; I knew about this for around a year or so, and posted about in my blog. I was jut doing other things and rampant testing. Though, I was suspicious of its existence, I found some weird routines and traced them for over an hour and sure enough, it really does exist... just with a few silly glitches.
I'm probably going to post more info on this new discovery and some old codes pertaining to the Super Game Boy 1/2 BIOS and how it interacts with various games, and other things.
Donkey Kong Land.gb Save game to have 100% on any file 17E-C19-4C2
Donkey Kong Land 2 Start a new game on Barrel Bayou 7A2-719-4C2 Dixie does not descend when using her hair to float 008-B6F-3B7
Donkey Kong Land 2 All sprites are invisible 001-39D-4C8 001-55D-4C8
Donkey Kong Land 3 All sprites are invisible 001-FBD-4C8 002-17D-4C8
Donkey Kong Land 3 Dixie does not descend when using her hair to float 009-0FF-3B7
Kirby Tilt N Tumble.gbc Make Game Boy/Super Game Boy compatible 001-BFF-F72
Earthworm Jim 2 - Menace to the Galaxy.gbc Can complete level without needing to collect nuts C0D-A0B-190 Super Jump 417-B4B-4C2 418-14B-4C2 Mega Jump 647-B4B-4C2 648-14B-4C2 Ultra Jump 7F7-B4B-4C2 7F8-14B-4C2
Earthworm Jim 2 - Menace to the Galaxy.gbc Disable music 006-9BB-E6E Press Start button at password screen to see unused printer screen 1 (the game will not print regardless because the programming for printing the password was not finished) 131-83B-80A Press Start button at password screen to see unused printer screen 2 (the game will not print regardless because the programming for printing the password was not finished) 141-83B-80A Press Start button at password screen to see unused printer screen 3 (the game will not print regardless because the programming for printing the password was not finished) 151-83B-80A Press Start button at password screen to see unused printer screen 4 (the game will not print regardless because the programming for printing the password was not finished) 161-83B-80A Press Start button at password screen to see unused printer screen 5 (the game will not print regardless because the programming for printing the password was not finished) 171-83B-80A Press Start button at password screen to see unused printer screen 6 (the game will not print regardless because the programming for printing the password was not finished) 181-83B-80A Staff Roll replaces title screen 0C2-84F-E66
Earthworm Jim 2 - Menace to the Galaxy.gbc Title screen music modifier (banks will go out of range past song 25) ??2-7FF-E6E 00-0F - Bank 1 10-1F - Bank 2 20-2F - Bank 3
Dr. Mario.nes Place pill to instantly win round GVUPAAAA
Hoyle Card Games.gbc Make Game Boy/Super Game Boy compatible (Intro skip version; graphics do not fully load. This code lets you partially play the games though with corrupt graphics and sometimes they will hang. You can at least listen to the music of your choice with this code and the "Play ??? song everywhere code" I made to play the unused song. 211-62F-E65
Boulder Dash.gb Invincible 007-499-E62 003-159-E62 002-FB9-E62 Infinite time to continue 00F-41C-3BE Press down to clear any obstacle (diamonds will not be collected if they are below you when you move over them. Useful for getting out of situations where you become trapped or if you want to clear rocks for a passageway.) EAF-98A-081 Press in any direction for a diamond explosion (this will kill you so use the 'Invincibility' code.) 00D-EDA-C4A 00D-E0A-C4A 00D-D3A-C4A 00D-C6A-C4A
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