Pokes
Infinite Energy
POKE 56693,190
This alters the line.
56692 DEC (IY+12)
To be a "ComPare" command, so energy is no longer depleted.
56692 CP (IY+12)
Also seen this documented as:
POKE 56691,0
POKE 56692,0
POKE 56693,0
Which just removes the command.
Stops Annoying Telecast Beeps
POKE 64988,0
This alters the line.
64987 DJNZ 64966
To point to itself (so you only hear a single "BEEP").
64987 DJNZ 64987