88 lines
2.1 KiB
Python
88 lines
2.1 KiB
Python
from components.ijvm import ijvm
|
||
|
||
class Ram:
|
||
|
||
def __init__(self,components,size):
|
||
self.data=dict()
|
||
self.lastAddr=size-1
|
||
self.c=components
|
||
|
||
def loadRamFile(self,filepath):
|
||
"""
|
||
Load a Ram file into self.data
|
||
"""
|
||
data=dict()
|
||
addr=0
|
||
f=open(filepath,"r")
|
||
for line in f.readlines():
|
||
line=line.rstrip() # remove \n
|
||
if line in ijvm:
|
||
data[addr]=int(ijvm[line])
|
||
else:
|
||
try:
|
||
value=int(line,0)
|
||
except:
|
||
raise ValueError("Invalide RAM entry: Address {} value {}".format(addr,line))
|
||
if value>255:
|
||
raise ValueError("Ram contain values that does not fit in a byte: value {} at address {}".format(value,addr))
|
||
data[addr]=value
|
||
addr+=1
|
||
f.close()
|
||
self.data=data
|
||
|
||
def write(self):
|
||
"""
|
||
Write data to memory based Mic-1 architecture
|
||
"""
|
||
addr=self.c["MAR"]
|
||
if addr>self.lastAddr:
|
||
raise ValueError("You get out of the ram by trying to set a value at address {}, max address is {}".format(addr,self.lastAddr))
|
||
self.data[addr]=self.c["MDR"]
|
||
|
||
def read(self):
|
||
"""
|
||
Read data from memory based Mic-1 architecture
|
||
"""
|
||
addr=self.c["MAR"]
|
||
value=None
|
||
try:
|
||
value=self.data[addr]
|
||
except:
|
||
if addr>self.lastAddr:
|
||
raise ValueError("You get out of the ram by trying to get value at address {}, max address is {}".format(addr,self.lastAddr))
|
||
if(value==None):
|
||
return(0)
|
||
return(value)
|
||
|
||
def fetch(self):
|
||
"""
|
||
Fetch next byte from memory based Mic-1 architecture
|
||
"""
|
||
addr=self.c["PC"]
|
||
value=None
|
||
try:
|
||
value=self.data[addr]
|
||
except:
|
||
if addr>self.lastAddr:
|
||
raise ValueError("You get out of the ram by trying to get value at address {}, max address is {}".format(addr,self.lastAddr))
|
||
if(value==None):
|
||
return(0)
|
||
return(value)
|
||
|
||
def dump(self):
|
||
"""
|
||
Simple dump helper
|
||
"""
|
||
for key,value in self.data.items():
|
||
#print("{}:{}".format(key,bin(value)[2:]))
|
||
print("{}:{}".format(key,value))
|
||
|
||
def dumpRange(self,start,end):
|
||
"""
|
||
Another dump helper
|
||
"""
|
||
for i in range(start,end+1):
|
||
try:
|
||
print("{}:{}".format(i,self.data[i]))
|
||
except:
|
||
print("{}:0".format(i))
|