folkert/python-pdp1170
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This commit is contained in:
Neil Webber 2023-09-18 21:18:28 -05:00
parent 7d9cee27c1
commit 9f1a9b0dab
1 changed files with 10 additions and 1 deletions
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11
pdpasmhelper.py
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@ -187,7 +187,7 @@ class PDP11InstructionAssembler:
def cmp(self, src, dst):
return self._2op(0o020000, src, dst)
def bic(self, src, dst):
def bit(self, src, dst):
return self._2op(0o030000, src, dst)
def bic(self, src, dst):
@ -404,6 +404,15 @@ class InstructionBlock(PDP11InstructionAssembler, AbstractContextManager):
return self.literal(0o000400 | self.bxx_offset(target))
def sob(self, reg, target):
# the register can be a naked integer 0 .. 5 or an 'r' string
try:
lc = reg.lower()
except AttributeError:
pass
else:
if len(lc) == 2 and lc[0] == 'r':
reg = int(lc[1:])
offs = self._label_or_offset(target)
# offsets are always negative and are allowed from 0 to -63