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better error message

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JensDiemer 2013-08-29 18:46:51 +02:00
parent 30f23c8bff
commit f23b145d94
1 changed files with 7 additions and 2 deletions
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9
generic/base_memory.py
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@ -16,10 +16,15 @@ class ROMBase(object):
def load_file(self, address, filename):
with open(filename, "rb") as f:
for offset, datum in enumerate(f.read()):
self._mem[address - self.start + offset] = ord(datum)
index = address - self.start + offset
try:
self._mem[index] = ord(datum)
except IndexError:
raise IndexError("ROM file %s bigger than: %s" % (filename, hex(index)))
def read_byte(self, address):
assert self.start <= address <= self.end
assert self.start <= address <= self.end, "Read %s from %s is not in range %s-%s" % (hex(address), self.__class__.__name__, hex(self.start), hex(self.end))
return self._mem[address - self.start]