Take a save game file and use a PD program such as NewZap to patch
byte 18 to a non-zero value. Load your save game, and now these
cheat options are enabled:
Arrow Keys - Move Rapidly over any terrain
B - Summon Gold Swan
R - Rescue Princess
= - Display coordinates
F10 - Location in coordinates
F9 - Increase time by 1 hour
Sometimes you can accumulate all the treasure you want by going
near the item, pressing space bar, and then continue hitting 'T'.
You'll receive an infinite supply of that treasure.