37 lines
1003 B
Python
37 lines
1003 B
Python
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def get_value(b:bytearray):
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ret=0
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for i,item in enumerate(b):
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ret|=item<<(8*i)
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return ret
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def set_value(b:bytearray,value:int):
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for i in range(len(b)):
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b[i]=(value>>(8*i))&0xff
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class cpu(object):
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def __init__(self,rom_addr:int,rom_size:int,mem_addr:int,mem_size:int) -> None:
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self.rom_addr=rom_addr
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self.rom=bytearray(rom_size)
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self.mem_addr=mem_addr
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self.mem=bytearray(mem_size)
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def get_value(self,addr:int,size:int):
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if not (size in [1,2,4,8]):
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raise Exception(f"CPU 异常 因为地址未对齐 {size}")
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if(addr>=self.rom_addr) and (addr<self.rom_addr+len(self.rom)):
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return get_value(self.rom[addr-self.rom_addr,addr-self.rom_addr+size])
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def set_value(self,addr:int,size:int,value:int):
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if not (size in [1,2,4,8]):
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raise Exception(f"CPU 异常 因为地址未对齐 {size}")
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if(addr>=self.rom_addr) and (addr<self.rom_addr+len(self.rom)):
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set_value(self.rom[addr-self.rom_addr,addr-self.rom_addr+size],value)
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