Transtech Transputer, User Manual

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The TMB12 Motherboard
TMB M 711 Transputer Motherboard User Manual
81
7.2.4 Other Hardware
This section describes the remaining hardware outside of the
electronic link switches.
7.2.4.1 Error Lights
There are three LEDs mounted on the edge of the TMB12 protuding
through the front plate. They monitor the error signals coming from
the various slots. Figure 60 summarizes.
7.2.4.2 User Power Connector
There is an optional four-way power connector, P3, mounted at the
front of the board. The connector plug is compatible with the power
supply socket on most disk units, and can be used to drive such
peripherals. From top to bottom the pins are:
The pins are rated for currents up to 3Amps.
7.2.4.3 Uncommitted Pins
Nine of the pins on edge connector P2 are wired to nine of the pins
(2 through 10) of an uncommitted connector, P4, on the board. The
two other pins of P4 (1 & 11) are wired to ground. P4 allows
Top connected to P2 3a & 3c (PAUX)
0V
0V
Bottom 5V
Table 29: User Power connector, P3
(LD1) displays error line from slot0
(LD2) displays error lines from the front row of
(LD3) displays error lines from the back row of
slots (excluding slot0) i.e., slots1,5,9,13,4,8 &12
slots, i.e., slots 2,6,10,14,3,7,11 &15
Figure 60. Error lights on the TMB12