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import config
config = config.Config()
rom = bytearray(open(config.rom_path, "r").read())
banks = {
0x02: 0x60,
0x08: 0x78,
0x1f: 0x68,
}
music_commands = {
0xd0: ["notetype", {"type": "nibble"}, 2],
0xe0: ["octave", 1],
0xe8: ["unknownmusic0xe8", 1],
0xe9: ["unknownmusic0xe9", 1],
0xea: ["vibrato", {"type": "byte"}, {"type": "nibble"}, 3],
0xeb: ["pitchbend", {"type": "byte"}, {"type": "byte"}, 3],
0xec: ["duty", {"type": "byte"}, 2],
0xed: ["tempo", {"type": "byte"}, {"type": "byte"}, 3],
0xee: ["unknownmusic0xee", {"type": "byte"}, 2],
0xef: ["unknownmusic0xef", 1],
0xf0: ["stereopanning", {"type": "byte"}, 2],
0xf1: ["unknownmusic0xf1", 1],
0xf2: ["unknownmusic0xf2", 1],
0xf3: ["unknownmusic0xf3", 1],
0xf4: ["unknownmusic0xf4", 1],
0xf5: ["unknownmusic0xf5", 1],
0xf6: ["unknownmusic0xf6", 1],
0xf7: ["unknownmusic0xf7", 1],
0xf8: ["unknownmusic0xf8", 1],
0xf9: ["unknownmusic0xf9", 1],
0xfa: ["unknownmusic0xfa", 1],
#0xfb: ["unknownmusic0xfb", 1],
0xfc: ["dutycycle", {"type": "byte"}, 2],
0xfd: ["callchannel", {"type": "label"}, 3],
0xfe: ["loopchannel", {"type": "byte"}, {"type": "label"}, 4],
0xff: ["endchannel", 1],
}
param_lengths = {
"nibble": 1,
"byte": 1,
"label": 2,
}
music_notes = {
0x0: "C_",
0x1: "C#",
0x2: "D_",
0x3: "D#",
0x4: "E_",
0x5: "F_",
0x6: "F#",
0x7: "G_",
0x8: "G#",
0x9: "A_",
0xa: "A#",
0xb: "B_",
}
for bank in banks:
header = bank * 0x4000 + 3
for sfx in range(1,banks[bank]):
sfxname = "SFX_{:02x}_{:02x}".format(bank, sfx)
sfxfile = open("music/sfx/" + sfxname.lower() + ".asm", 'a')
startingaddress = rom[header + 2] * 0x100 + rom[header + 1] + (0x4000 * (bank - 1))
curchannel = 1
lastchannel = (rom[header] >> 6) + 1
output = ''
while 1:
# pass 1, build a list of all addresses pointed to by calls and loops
address = startingaddress
labels = []
labelsleft = []
while 1:
byte = rom[address]
if byte < 0xd0:
command_length = 1
elif byte < 0xe0:
command_length = 2
elif byte < 0xe8:
command_length = 1
else:
command_length = music_commands[byte][-1]
if byte == 0xfd or byte == 0xfe:
label = rom[address + command_length - 1] * 0x100 + rom[address + command_length - 2]
labels.append(label)
if label > address % 0x4000 + 0x4000: labelsleft.append(label)
address += command_length
if len(labelsleft) == 0 and (byte == 0xfe and rom[address - command_length + 1] == 0 and rom[address - 1] * 0x100 + rom[address - 2] < address % 0x4000 + 0x4000 or byte == 0xff): break
while address % 0x4000 + 0x4000 in labelsleft: labelsleft.remove(address % 0x4000 + 0x4000)
# once the loop breaks, start over from first address
end = address
if curchannel != lastchannel: end = rom[header + 5] * 0x100 + rom[header + 4] + (0x4000 * (bank - 1))
address = startingaddress
byte = rom[address]
# pass 2, print commands and labels for addresses that are in labels
while address != end:
if address == startingaddress:
output += "{}_Ch{}: ; {:02x} ({:0x}:{:02x})\n".format(sfxname, curchannel, address, bank, address % 0x4000 + 0x4000)
elif address % 0x4000 + 0x4000 in labels:
output += "\n{}_branch_{:02x}:\n".format(sfxname, address)
if byte < 0xc0:
output += "\tnote {}, {}".format(music_notes[byte >> 4], byte % 0x10 + 1)
command_length = 1
elif byte < 0xd0:
output += "\trest {}".format(byte % 0x10 + 1)
command_length = 1
else:
if byte < 0xe0:
command = music_commands[0xd0]
output += "\t{} {},".format(command[0], byte % 0x10)
byte = 0xd0
elif byte < 0xe8:
command = music_commands[0xe0]
output += "\t{} {}".format(command[0], 0xe8 - byte)
byte = 0xe0
else:
command = music_commands[byte]
output += "\t{}".format(command[0])
command_length = 1
params = 1
# print all params for current command
while params != len(music_commands[byte]) - 1:
param_type = music_commands[byte][params]["type"]
address += command_length
command_length = param_lengths[param_type]
param = rom[address]
if param_type == "nibble":
output += " {}, {}".format(param >> 4, param % 0x10)
elif param_type == "byte":
output += " {}".format(param)
else:
param += rom[address + 1] * 0x100 - 0x4000 + (bank * 0x4000)
if param == startingaddress: output += " {}_Ch{}".format(sfxname, curchannel)
else: output += " {}_branch_{:02x}".format(sfxname, param)
params += 1
if params != len(music_commands[byte]) - 1: output += ","
output += "\n"
address += command_length
byte = rom[address]
header += 3
if curchannel == lastchannel:
output += "; {}".format(hex(address))
sfxfile.write(output)
break
output += "\n\n"
startingaddress = end
curchannel += 1
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