Boulderdash 2

Unlimited lives:
Load or reset the game, then execute the following BASIC commands before running or restarting the program.
POKE 47378,165
SYS 49125

Unlimited lives (alternate):
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 25088,250

Invincibility:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 23114,255