Transtech Transputer, User Manual

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The TRAM Standard
TMB M 711 Transputer Motherboard User Manual
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section of the manual for the order in which they are connected), and
so on for the other slots on the motherboard. Link1 of module 0
(called
PipeHead ) and link2 of module n (called PipeTail ) are in
general brought out to the edge connector to allow pipelines to be
constructed across several motherboards (figure 21).
Not all applications will use all of the slots on the motherboard. Some
applications will require to use TRAMs which are larger than size1
(but only use one set of 16 pins for interfacing to the motherboard).
In both of these cases the pipeline will become broken. To avoid this
a special pipeline jumper is supplied which bridges the break (figure
5).
The pipe jumper plugs into unused slots (either on the motherboard
or on a TRAM) and connects link1 of that slot to link2 of that slot.
3.3.2.2 Programmable Link Configuration
Some motherboards have a number of C004 link crossbar switches
mounted on them. These are devices that allow the topology of the
interconnections between transputers to be set electronically under
software control.
The links 0 and 3 of each slot on the motherboard are taken to the
switches for programmable link connection. The degree of
interconnectivity achievable depends on the number of slots and the
number of switches on the board. For example, on the TMB12 16 slot
motherboard, two switches provide for 64 link connections.
3.3.2.3 The Configuration Pipeline
Each link switch is controlled by a 16 bit T2 transputer. Each T2 can
control up to two link switches via its links 0 and 3 (figure 22).
Board0 Board1 Boardn
PipeHead
PipeTail
Figure 21. Module pipeline split across several motherboards.
PipeHead PipeHead
PipeTail PipeTail