Find the spell costs at each level of Magic in a Zelda 2 ROM.

find_magic_costs.py

inputfile = r"path\to\ROM"

# Because ROM hacks might change the actual spells, I left out the names from the list, but here they are, along with vanilla costs:
"""
Vanilla costs:
Shield  [32, 24, 24, 16, 16, 16, 16, 16]
Jump    [48, 40, 32, 32, 20, 16, 12, 8]
Life    [70, 70, 60, 60, 50, 50, 50, 50]
Fairy   [80, 80, 60, 60, 40, 40, 40, 40]
Fire    [120, 80, 60, 30, 16, 16, 16, 16]
Reflect [120, 120, 80, 48, 40, 32, 24, 16]
Spell   [120, 112, 96, 80, 48, 32, 24, 16]
Thunder [120, 120, 120, 120, 120, 120, 100, 64]
"""

spells = list()
with open(inputfile, "rb") as fh:
  fh.seek(0x0D8B) # The position of the spell cost table in the ROM
  for i in range(8):
    spell = list(fh.read(8))
    # Mechanically, magic values are 0-255 instead of 0-128; divide internal number by 2 to get player-shown value
    spell = [ord(i)/2 for i in spell]
    spells.append(spell)
  
# Spells, in order, are now in the spells list (which is a list of lists, as a result).
for spell in spells:
  print spell