Writing an emulator in python - implementation questions (for performance)

[Santiago Romero]

> You can do clever memory slicing like this with numpy.  For instance:
>
> breg = numpy.zeros((16,),numpy.uint8)
> wreg = numpy.ndarray((8,),numpy.uint16,breg)
>
> This causes breg and wreg to share the same 16 bytes of memory.  You
> can define constants to access specific registers:

 What I'm doing wrong?

[sromero at compiler:~]$ cat test.py
#!/usr/bin/python

import numpy

# Register array
breg = numpy.zeros((16,),numpy.uint8)
wreg = numpy.ndarray((8,), numpy.uint16, breg )

reg_A   = 1
reg_F   = 2
reg_AF  = 1
reg_B   = 3
reg_C   = 4
reg_BC  = 3

breg[reg_B] = 5
breg[reg_C] = 10
print breg[reg_B]
print breg[reg_C]
print wreg[reg_BC]


[sromero at compiler:~]$ python test.py
5
10
0

 ?