Address Modification - ZiLOG Z80-AIO Hardware User Manual

3.3 Address Modifikation
The AIO or AIB Interfaces to the Z80 MCB I/O bus, occupying
ten locations in the I/O address space.
are used to transfer the input channel address and board
Status while the remaining locations are used for passing
data to the two D/A Converters.
I/O ADDR.
80
81
82
83
88
89
8C
8D
8E
8F
The board, äs received from the factory, is wired to occupy
those locations shown in Table 3.3.1.
registers cannot occupy the same locations, and the three
Address modification is achieved by removing the existing
address selection Jumpers and then installinq those indicated
a "one" occurs in the address, the High jumper should be
be installed.
PORT A data
PORT B data
PORT A Control
PORT B Control
Address Register (Sei. Ch. No.)
Status Register
Low byte DAC 2 Register
PREWIRED I/O ADDRESSES
The first four
The next two locations
However, it is
The only