Notes:Earth Defense Force (SNES)

This page contains notes for the game Earth Defense Force (SNES).

Invincibility Cheat Subroutine

The addresses correspond to the Japanese version Super E.D.F.

$00/861D 4B          PHK                     
$00/861E AB          PLB                     
$00/861F C2 30       REP #$30                
$00/8621 AD 53 01    LDA $0153  [$00:0153]   //controller button press
$00/8624 F0 15       BEQ $15    [$863B]      
$00/8626 AD 3F 01    LDA $013F  [$00:013F]   //cheat progress counter
$00/8629 0A          ASL A                   
$00/862A AA          TAX                     
compare button press against stored cheat sequence
$00/862B BD 4F 86    LDA $864F,x[$00:864F]   
$00/862E CD 53 01    CMP $0153  [$00:0153]   
$00/8631 F0 05       BEQ $05    [$8638]      
button press doesn't match
$00/8633 9C 3F 01    STZ $013F  [$00:013F]   //reset cheat progress
$00/8636 80 03       BRA $03    [$863B]      
button press matches
$00/8638 EE 3F 01    INC $013F  [$00:013F]   
check progress
$00/863B AD 3F 01    LDA $013F  [$00:013F]   
$00/863E C9 0A 00    CMP #$000A              //10 successful presses required
$00/8641 90 0B       BCC $0B    [$864E]      
success
$00/8643 A9 FF FF    LDA #$FFFF              
$00/8646 8D 81 01    STA $0181  [$00:0181]   
$00/8649 85 16       STA $16    [$00:0016]   
$00/864B 9C 0A 01    STZ $010A  [$00:010A]   //resumes gameplay
exit
$00/864E 60          RTS                     

00864F 8000 0080 4000 0040 2000 1000 0008 0004 0002 0001
       A    B    X    Y    L    R    up   down left right