Arcade Classic No. 3 - Galaga & Galaxian (USA) (SGB Enhanced) TEST EN 6901 ICON EN 7103 Unused Code

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Arcade Classic No. 3 - Galaga & Galaxian (USA) (SGB Enhanced).gb

There actually is a lot of interesting unused SGB functions in this game.

There appears to be several palettes.

The game also contains an INIT MLT_REQ 8900 but the game doesn't use this list and instead 8901 because it actually does support 2-player using 2 SNES controllers. Not many people knew this game supports the multiplayer mode.

The game was intending to disable the player's ability to change palette and controller settings. Glad their minds were changed

Most interestingly, the game does list the TEST_EN 6901 mode.
Replace PAL01 with unused ICON_EN 7103, disabling palettes and controller settings.
2E5-ECF-910

Replace PAL09 with unused TEST_EN 6901.
3E5-F8F-5D4

The game was released in Europe and US and a few changes were made. More than the EU/US header byte was changed, implying that they wanted to to use TEST_EN for region lockout. Because the SGB was later revised to disable TEST_EN, this also implies that the game was developed using an early revision of the official GB documents.

There is one other game that actually does call the mode though it sets the bit to 00. I will post this later.
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