Battle Shark

Battle Shark
Developer: Taito Publisher: Taito Platform: Arcade (Taito Z System) Released internationally: July 1989 This game has unused code. This game has unused graphics. This game has a hidden level select.

Battle Shark is a submarine simulator that takes place during World War III. The enemy (whoever that may be) is building an underwater fortress in the most unexpected of places: The ocean!! Go blow that thing up, why not?

Round Select

This game uses a variant of the always-popular Taito Code:

• While the game boots up, hold the Service Coin button until a "SERVICE SW ERROR" message pops up on the screen.
• Then, press 1P Button 1 (x3), Service Coin, 1P Button 1.

A stage select menu should pop up after starting a new game. Press 1P Button 4 / 1P Button 5 to navigate the menu and 1P Button 1 to select a stage.

(Source: Original TCRF research)

Unused Graphics

Stored at the beginning of the character graphics ROM is a working name for the game. Sensuikan means submarine!

(Source: Original TCRF research)

Error Handler Leftovers

Most of the standard 68000 exception vectors have entries in the exception vector table, but they all point to ROM space 0x0F00000. That ROM space might have been used by development hardware while the game was still being tested, but it's empty in the final game.

Vector	Address
Bus Error	0xF00000
Address Error	0xF00014
Illegal Instruction	0xF00028
Zero Divide	0xF0003C
CHK Instruction	0xF00050
TRAPV Instruction	0xF00064
Privilege Violation	0xF00078
Trace	0xF0008C
Line 1010 Emulator	0xF0009A
Line 1111 Emulator	0xF0009A

(Source: Original TCRF research)