folkert/python-pdp1170
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comment cleanups

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This commit is contained in:
Neil Webber 2023-09-09 06:42:26 -05:00
parent bc67b65de2
commit 57fc274d20
1 changed files with 7 additions and 3 deletions
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10
mmio.py
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@ -50,6 +50,9 @@ class MMIO:
# else: # else:
# ... this is the write case # ... this is the write case
# #
# Zero, of course, is a possible and common value to write, so do not make
# the rookie mistake of testing value for truthiness; test for *is* None.
#
# The ioaddr will always be relative to the base of the I/O page: # The ioaddr will always be relative to the base of the I/O page:
# (ioaddr & 8191) == ioaddr will always be True # (ioaddr & 8191) == ioaddr will always be True
# #
@ -127,15 +130,15 @@ class MMIO:
# The PDP-11 RESET instruction causes the UNIBUS to be reset. # The PDP-11 RESET instruction causes the UNIBUS to be reset.
# Devices that want to know about this should: # Devices that want to know about this should:
# #
# mmio.devicereset_reigster(resetfunc) # mmio.devicereset_register(resetfunc)
# #
# And then resetfunc will be invoked as: # And then resetfunc will be invoked as:
# resetfunc(mmio.ub) # resetfunc(mmio.ub)
# (i.e., passed a single argument, the UNIBUS object). # (i.e., passed a single argument, the UNIBUS object).
# #
# For dead-simple cases, the optional reset=True argument can be # For dead-simple cases, the optional reset=True argument can be
# supplied, which casues register() to also arrange for the iofunc # supplied to register(), which will cause it to also arrange for the
# to be called at RESET time, like this: # iofunc to be called at RESET time, like this:
# #
# iofunc(baseaddr, 0) # iofunc(baseaddr, 0)
# #
@ -204,6 +207,7 @@ class MMIO:
self.mmiomap[idx+i] = iofunc self.mmiomap[idx+i] = iofunc
return offsetaddr return offsetaddr
# wrap an I/O function with code that automatically handles byte writes.
def _byte_wrapper(self, iofunc): def _byte_wrapper(self, iofunc):
def byteme(ioaddr, value=None, /, *, opsize=2): def byteme(ioaddr, value=None, /, *, opsize=2):
if (value is None) or (opsize == 2): if (value is None) or (opsize == 2):