Master Controller - HP 64000 Reference Manual

MODEL 64000
SYSTEM OVERVIEW MANUAL
Master Controller
Just inside the rear panel is the rear-panel board (see figure 2-24). On the lower left-hand
side are four sockets and two IC's. The positions of these IC's determine whether the
development station ';,vill act as a master controller or slave controller. If the IC's are in the U3
and U4 positions, the deveiopment station will act as a master controller; if the IC's are in
positions U11 and U12, the development station will act as a slave controller. The master
controller has responsibility for initializing the bus at power up, bus error recovery, and
resistive line termination. Otherwise, after power-up, all stations operate as peers in the
cluster.
Master Controller
Positions
Non-controller
Positions
Figure 2-24. Rear Panel Board
In a single development station system, the development station must be designated the
master controller by putting the IC's in the U3 and U4 controller positions.
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