D = Down D-Pad
U = Up D-Pad
L = Left D-Pad
R = Right D-Pad
R_Hit = Trigger right button
L_Hit = Trigger left button
_ = Pause
1. Expert mode
D,_,D,_,D,_,D,_,D (mash down really fast)
Turn on GG. Use the config cheat. Select 'game completed'. Select 'reset'. Punch in above code at logo. Start a new game. The narrator will inform you that the journey will be more difficult.
Start / continue a game. Play around with the options. Beware: it may obliterate save slot 1.
3. Turbo mode
4. Sound test
Select a game to load. You must hit START + U _immediately_ afterwards. Promptly let go when the screen flashes.
It was intensely painful on my aged fingers to even do #1 correctly. So if you're a techie of sorts, grab that hex editor and it'll be easier (suggestion: Hex Workshop).
1. Go to $6A13 of your ROM. Enter $02, $00 (x 9). At the Sega logo, you now only need to hit 'Down' once to enable.
2. Go to $6A3C of your ROM. Enter $01, $00 (x 9). At the Sega logo, you now only need to hit 'Up' once to enable.
3. Go to $6A65 of your ROM. Enter $04, $00 (x 9). At the Sega logo, you now only need to hit 'Left' once to enable.
4. Go to $7aad. Enter $01. Now keep holding 'UP' after you select the game to load. The colors will change color when done correctly.