To activate cheat mode, start the game with the command "PRINCE MAKINIT2". The following codes are now available during the game.

Code       Effect
+          add time
-          sub time
K          kill all enemy on screen
R          return from dead
F1         show position (press again to disable)
F3         player on/off
F6         ruler
SHIFT-T    add energy
SHIFT-K    sub energy
SHIFT-R    show room number and jump right
SHIFT-W    show room number and jump left 
SHIFT-I    turn screen upside down, press again to restore
SHIFT-B    show prince only, press again to restore
ALT-N      skip to next level
ALT-D      create DUMP?.TXT