Unused Game Content ~ Tetris Attack ヨッシーのパネポン SGB Unused Character Animations (All)

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nensondubois

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Published on March 1, 2016 5:10:48 AM ● Video Link: https://www.youtube.com/watch?v=Lc69h-p1144

Game:

Tetris Attack (1995)

Duration: 29:07

912 views

4

Setting RAM address C152 to 04 (Game Genie codes 3E2-CD9-C45 + 042-CE9-F77) will display this unused animation for all characters. Possibly an early "hit" animation?
Unused Super Game Boy Functions {READ FOR MORE}

There is quite a bit of evidence that would suggest that additional palette settings were planned, possibly fitting each of the hidden borders.

MASK_EN

Used to mask the game screen to prevent garbage from showing from VRAM transfers (borders and other information). Setting bit 01 to 00 unfreezes the game screen, when set to 01 the image is frozen with the current picture, when set to 02 the screen is black and when set to 03 the screen is set to the defined palette 00 setting.

Located at 0x3426 are two unused MASK_EN commands. Since palette setting 00 is undefined, the command is ignored displaying the game.

B9010000000000000000000000000000
B9000000000000000000000000000000

PAL_SET

Used to set the indirect system custom enhanced Super Game Boy palette setting or to copy pre-defined logical palette data from Super Game Boy system colour palette designated by the loaded PAL_TRN data to an actual Super Game Boy palette. PAL_TRN palette information should be set before initialising PAL_SET.

Starting at 0x34D6 is an entire table for unused PAL_SET entrees. Only the first entree located at 0x34C6 is used and is loaded on all borders with bit 07-08 palette attributes set to 00C0. Game Genie codes ?60-B0C-F71 + ?40-B1C-3BA will load your selected palette. Use code C04-EFC-E68 with an increment of 10h to set the attribute to C0h which might be necessary to unmask the screen.

PAL_SET listing
[CODE]
51010000000000000080000000000000
51020000000000000080000000000000
51030000000000000080000000000000
51040000000000000080000000000000
51050000000000000080000000000000
51060000000000000080000000000000
51070000000000000080000000000000
51080000000000000080000000000000
51090000000000000080000000000000
510A0000000000000080000000000000
510B0000000000000080000000000000
510C0000000000000080000000000000
[/CODE]

PAL_PRI 00

While listed as an unknown Super Game Boy packet C9, when bit 01 is set to 00, palettes do not switch back to default when directed to by the game, and since there is only one very bland palette setting for Tetris Attack, this is unnecessary and leftover from a probable early idea to include additional palettes and to have them switch back to the default game's palette as seen in Kirby's Dream Land 2, Donkey Kong (Game Boy), Donkey Kong Land and others. Adding the command may have been a very early design decision.
PAL_PRI 01

Game Genie code will set the PAL_PRI bit to B60-5FC-5D4. There is also code to load the command, but it is never called.
Removed Command Calls

Empty space for dummy command calls, likely belonging to the unused PAL_SET commands is found at 0x35C6. There is code to load this command though it is never called.

I also has info on border placeholder tiles but I can't find that right now. Also had border ROM patch codes which will also have to wait until I'm not lazy to create them again. Sorry but until I feel comfortable, an unused graphics video is going to have to wait.

Here is something to work with for now:
??3-D3C-808 Border X
??3-C9C-E6A Border Y

Masaya Kuzume - [Tetris Attack] Forest Stage

Other Statistics