2018-08-31 18:42:12 +02:00
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#!/usr/bin/python
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class Caretaker:
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def __init__(self):
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self.objects=dict() # Create empty objects pool
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# Add registers to pool
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for reg in ["MAR","MDR", "PC", "MBR", "SP","LV","CPP","TOS","OPC","H"]:
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self.objects[reg]=0
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self.objects["RAM"]=None
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2018-09-01 10:19:06 +02:00
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def __getitem__(self,key):
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if key=="MBRU": # If we ask for unsigned
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return(self.objects["MBR"] & 0x000000FF)
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elif key=="MBR": # If we ask for signed
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if self.objects["MBR"]>=0:
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return(self["MBRU"])
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else: # Send 2 complement if it's lower than 0
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return(self.objects["MBR"] & 0xFFFFFFFF)
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2018-08-31 18:42:12 +02:00
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return(self.objects[key])
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2018-08-31 20:18:08 +02:00
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def __setitem__(self,key,value):# TODO: Do special treatment for MBR (allow only 2^8 value)
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# TODO: Force data to be at most 32 bits longs (Mic-1 architecture constraint)
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2018-08-31 18:42:12 +02:00
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self.objects[key]=value
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def items(self):
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return(self.objects.items())
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