Transtech Transputer, Руководство пользователя

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The Transputer Module Motherboard
28
Transputer Motherboard User Manual TMB M 711
The simplest relation between two motherboards is direct
connection.Motherboards can be chained together by connecting the
down port of one board to the up port of the next. In this case all the
boards in the chain are controlled from the same source, i.e.
whatever it is that controls the first motherboard in the chain.
The other type of relation between two motherboards is that of
master-slave. This allows the module0 of the first motherboard to
control a subnetwork of TRAMs, some of which may be on the
second motherboard. This is achieved if the subsystem port of the
first motherboard is connected to the up port of the second
motherboard.
Figure 27 shows a master network consisting of all the of processors
on
boarda , as well as the first processor on each of boardb and
boarde . Two of the processors in this master network control their
own subnetworks. The first subnetwork consists of the processor on
modules1 to n of
boardb and all the processors on boardc/d . The
second subnetwork consists of the processors on modules1 to n of
boarde and all of the modules on boardf/g .
The notReset and notAnalyse signals flow from the subsystem of a
master board to the up port of a slave board. From there they are
connected directly to the down port of the slave board. Hence reset
and analyse are connected to all boards in a chain allowing the
master to control all processors without hindrance. E.g. boardc can
be reset/analysed by boarda without interference by boardb in figure
27, above.
Up
Down
Sub
system
Up
Down
Sub
system
Up
Down
Sub
system
Up
Down
Sub
system
Up
Down
Sub
system
Up
Down
Sub
system
Up
Down
Sub
system
Figure 27. Controlling a subsystem of boards
a
b c
d
e f
g