Code notes:

These codes can be activated during game play in any mission. The 
codes are based on memory sentences (mnemonics) where the letters 
A, B, and C are the corresponding buttons on the controller, and E 
is RS. To initiate the secret codes, press and release B to fire 
the laser. Press P to pause the game while the laser is visible on 
the screen. (Note that the codes will not work if B and P were 
pressed at the same time.) Now, press RS(2), B, A, B, RS, A, C, A 
(mnemonic: THREE BABES IN A CAR). After entering the code, press X. 
Instead of stopping, the game will continue in cheat mode. Cheat 
mode must be entered after each mission is started in order for all 
other codes to work.

Refuel
Press P to pause game play. The laser does not need to be visible. 
Press A, RS, A, RS(2), A (mnemonic: A GREAT NEED FOR GAS). Press X 
to resume game play. 

Super laser
Press P to pause game play. The laser does not need to be visible. 
Press B, RS, A(2), RS (mnemonic: BIG MEGA LASER). Press X to resume 
game play. 

Smart bomb
Press P to pause game play. The laser does not need to be visible. 
Press A, RS, A, B(2) (mnemonic: A MEGA BOMB). Press X to resume 
game play. 

End mission successfully
Press P to pause game play. The laser does not need to be visible. 
Press A, C, A, RS, A(2), B, A(3) (mnemonic: A CAT EATS A BANANA). 
Press X to resume game play. 

Instant death
Press P to pause game play. The laser does not need to be visible. 
Press A, B, C(2), B, A, RS(3). Press X to resume game play. 

Invincibility
Press P to pause game play. The laser does not need to be visible. 
Press A(3), C, RS (mnemonic: I AM AN ACE). Press X to resume game 
play. 

Turbo
Press P to pause game play. The laser does not need to be visible. 
Press A(2), RS(2), C, A (mnemonic: WHAT A SPEEDY CAR). Press X to 
resume game play. 

Toggle bouncing/wrapping
Press P to pause game play. The laser does not need to be visible. 
Press A, B, A, B, RS (mnemonic: WRAP BABE). Press X to resume game 
play. Use this code to alternate between the bouncing and wrapping 
modes. The normal mode of the game is "bouncing", where your ship 
bounces against the map limit. "Wrapping" mode allows your ship to 
exit the map on one side and re-enter on the opposite side. 

Hint: Easy instrument panel access:
While using the elevation scanner, press X to view the instrument 
panel. 

Passwords:
A Jumpgate code is revealed after each system is completed. These 
codes may be manually entered to access a particular system. The 
codes consist of six of the fifteen total symbols available. Refer 
to the symbols as arranged in three rows (A, B, and C) of six 
symbols each, except row C which only contains three symbols: 

    A1  A2  A3  A4  A5  A6
    B1  B2  B3  B4  B5  B6
    C1  C2  C3

System  Password  

1       C3 B5 B2 A2 A3 C2  
2       B1 A1 A3 A5 A1 B3  
3       B4 C3 A1 C2 C2 A1  
4       A3 B5 C3 A2 A5 C3  
5       B3 C2 A1 A2 A5 A4  
6       B4 B2 A2 C1 B6 B5