Transtech Transputer, User Manual

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The TMB14 Motherboard
TMB M 711 Transputer Motherboard User Manual
99
possible connections, the relevant pair of jumpers is installed, JA for
link connection A and so on. Mutually exclusive settings must not be
made as they will prevent the board from operating correctly. This
means that there must not be more than one connection to any of the
nine links listed.
The locations of JA-JI are shown on figure 73, and the possible
settings are summarized in section 8.4.4 on page 104.
8.3.2 Subsystem
The connection of the control signals (reset, analyse and error)
between the VMEbus interface, the edge connectors and the TRAM
slots is configured by four hardware jumpers. Figure 72 illustrates the
possible connections with the three signals represented as a single
bus line.
The switches are shown as they would be with the relevant jumper
installed. Removing the jumper moves the switch to the oposite
connection.
The ServicesUp/ServicesDown daisy-chain allows many boards to
be controlled from one subsystem source, and is analogous to the
configuration link pipeline.
The operation of the jumpers is sumarized in section 8.4.3 on page
103.
The error signal from the each TRAM slot is also brought out onto
eight leds on the front panel. The top left led is ERROR0, the top
right is ERROR1, the bottom left is ERROR6 and the bottom right is
ERROR7.
C004 A Link 31
VMEbus Link
P4 Connector Link
Slot 0 Link 0
C004 B Link 0
C004 A Link 0
Slot 0 Link 1
T2 Link 1
ConfigUp
A
B
C
D
E
F
G
H
I
Figure 71. Logical link connections made with JA to JI