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BOARD ADDRESS SELECTION JUMPER SOCKETS
The board address is selected by jumpers or a DIP switch
in locations C
8
this board may be jumpered:
put instructions and
structions.
The case of input/output instructions will
be treated first.
In selection location B9, pins
together and pins 5 and 12 must be jumpered together.
Address bits 0 and 1 determine which of the four input or
output ports will be addressed. Port address bits 2 and 3
and B9.
There are two cases for which
) to respond to input/out-
1
) to respond to memory access in
2
8
PIO 4, Rev. 2
User Guide
and 9 must be jumpered
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