Sonic Chaos (Sega Master System)

The Game Gear version on your TV. Chaos!

Sub-Pages#

Prototype Info Prerelease Info

Debugging Features#

Error Handler#

Another common feature of Aspect's Sonic games, there's a generic error handler routine at ROM 0x70. If the code at that address somehow executes, the game clears the screen, tries to write the message "ERROR", waits for 3 seconds, and then resets. The game doesn't intentionally jump to this code at any point, and it would be of little use anyway because the message will only be intelligible if an ASCII font is already loaded at VRAM 0x2400 (e.g. on the level select screen).

Level Select#

At the title screen, press Up, Up, Down, Down, Right, Left, Right, Left, 1.

Sound Test#

At the title screen, press Down, Down, Up, Up, Left, Right, Left, Right, 1.

The Sonic on this screen is part of an Easter egg: Press Down, Down-Right, Right, 1 or 2, and he'll perform a Hadouken!

Unused Levels#

Existing in both versions of the game, Zone IDs $06 and $0D have a blank name. In the Master System version, they just show up as "ZONE". In the Game Gear version, they show up as garbled text followed by "ZONE". Both levels function normally with the exception of the boss, which causes camera and VRAM issues.

Layout-wise, they're a copy of Turquoise Hill with few differences, apart from the occasional graphical glitch:

• The giant Motobug boss in Act 3 is glitched: after it is attacked once, it stays in its "flashing" palette for the rest of the fight.
• The HUD doesn't clear correctly before the boss, and continuously loops around the screen until part of it becomes overwritten by the boss graphics.
• $06 uses Special Stage music, so it was likely intended for another Special Stage. $0D plays no music at all, which is unusual because it plays the boss theme in the Game Gear version.

Build Date#

Stored at xC0 in the ROM.

MS SONIC¥CHAOS  
  < Ver1.20 > 
1993/08/03 @SEGA
/Aspect Co.,Ltd 

References#