65 lines
1.7 KiB
Python
65 lines
1.7 KiB
Python
import base64
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from rom.ips import IPS_Patch
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def pc_to_snes(pcaddress):
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snesaddress=(((pcaddress<<1)&0x7F0000)|(pcaddress&0x7FFF)|0x8000)|0x800000
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return snesaddress
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def snes_to_pc(B):
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B_1 = B >> 16
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B_2 = B & 0xFFFF
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# return 0 if invalid LoROM address
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if B_1 < 0x80 or B_1 > 0xFFFFFF or B_2 < 0x8000:
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return 0
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A_1 = (B_1 - 0x80) >> 1
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# if B_1 is even, remove most significant bit
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A_2 = B_2 & 0x7FFF if (B_1 & 1) == 0 else B_2
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return (A_1 << 16) | A_2
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class ROM(object):
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def readWord(self, address=None):
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return self.readBytes(2, address)
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def readByte(self, address=None):
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return self.readBytes(1, address)
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def readBytes(self, size, address=None):
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if address != None:
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self.seek(address)
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return int.from_bytes(self.read(size), byteorder='little')
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def writeWord(self, word, address=None):
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self.writeBytes(word, 2, address)
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def writeByte(self, byte, address=None):
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self.writeBytes(byte, 1, address)
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def writeBytes(self, value, size, address=None):
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if address != None:
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self.seek(address)
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self.write(value.to_bytes(size, byteorder='little'))
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class RealROM(ROM):
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def __init__(self, name):
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self.romFile = open(name, "rb+")
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self.address = 0
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def seek(self, address):
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self.address = address
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self.romFile.seek(address)
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def write(self, bytes):
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self.romFile.write(bytes)
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def read(self, byteCount):
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return self.romFile.read(byteCount)
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def close(self):
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self.romFile.close()
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def ipsPatch(self, ipsPatches):
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for ips in ipsPatches:
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ips.applyFile(self)
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