Start disk 1 with the word BGM pressed down, and start disk 2 with GO pressed down.
Press during the game Shift and choose the last option but one.
Booting Game Disk 0 (disk 3) while holding GO starts the game in corrupt graphics showing an old woman's face in place of Fray's.
Tip
While playing, press Shift to open the game menu. Select the 3rd option and then highlight the BGM option. Now, hold C and wait for a text screen to appear completely, once it appears and while still holding C, press Up, Up, Down, Down, Right, Left, Right, Left and X. If done right, the debug menu will appear.
Tip
Fast mode
Start the game on Panasonic FS-A1WX or FS-A1WSX while holding T key. Its effect is very subtle.