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Fixed bug in Memory autoinc handling

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This commit is contained in:
Ross Wilson
2015-06-21 19:53:16 +07:00
parent bd37a8aa4c
commit 9645eda74c
1 changed files with 6 additions and 5 deletions
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11
pymlac/Memory.py
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@@ -201,14 +201,15 @@ class Memory(object):
# the Imlac can get into infinite defer loops, and so can we!
while indirect:
address = address & (MEMORY_SIZE - 1)
address = MASK_MEM(address)
# if indirect on auto-inc register, add one to it before use
if ISAUTOINC(address):
# indirect on auto-inc register, add one to it before use
self.memory[address] = MASK_MEM(self.memory[address] + 1)
address = self.memory[address]
self.memory[address] += 1
address = self.memory[MASK_MEM(address)]
indirect = bool(address & 0100000)
return self.memory[address]
return self.memory[MASK_MEM(address)]
def eff_address(self, address, indirect):
"""Get an effective memory address.