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|  MIL-D-81347C(AS)
TACCO Tray Logic
3.5.1.4.3
Functional Description - The TACCO Tray Logic (TTL) is an
3.5.1.4.3.1
interface unit between the TACCO Tray and the computer (via the Digital Input/Output Multiplexer).
The TACCO Tray will be a physical part of the MPD Display Console, located at the TACCO Station.
The TACCO Tray provides the operator with the controls needed to execute the tactical situation.
Using the controls on the Tray, the TACCO can utilize the DPS and computer to:
(1) Communicate with the sensor operators.
(2) Control the display of data from the sensor operators and the
major subsystems on the MPD Display at the TACCO station.
(3) Initiate computer implemented functions which affect the
operation of the Navigation, Communication, Sensor, Armament, and Ordnance subsystems.
Figure 8 is a functional flow diagram for the TTL.
General Description - The TACCO Tray Logic shall provide:
3.5.1.4.3.2
(1) The encoding and transmission of data from the TACCO Tray
to the computer.
(2) The decoding and storage of data from the computer to the
TACCO Tray.
operating Requirements - The TTL shall detect the depression of
3.5.1.4.3.3
any switch on the tray and transmit a code identifying the depressed switch to the computer via the
DIM. The operator will not have two switches depressed at the same time. The TTL shall interpret
the computer output word received from the DOM and perform one of the following operations:
(1) Store the four bits of the computer word which specify the
combination of function messages to be illuminated on the Matrix A Readout switches and the Matrix
Select A switch to be lit. This four bit code shall be supplied to the TACCO Tray.
(2) Store the four bits of the computer word which specify the
combination of function messages to be illuminated on the Matrix B Readout switches and the Matrix
Select B switch to be lit. This four bit code shall be supplied to the TACCO Tray.
(3) Store the four bits of the computer word which specify the
combination of function messages to be illuminated on the Matrix C Readout switches and the Matrix
Select C switch to be lit. This four bit code shall be supplied to the TACCO Tray.
(4) Set or reset one of the 36 flip-flops. Each flip-flop shall
control the illumination of the colored backfground (message 12) on one of the Matrix A, B, and C
Readout switches. An output from each of the flip-flops shall be supplied to the TACCO Tray.
(5) Reset the 12 flip-flops which control the illumination of the
colored background (message 12) on the Matrix A Readout switches.
(6) Reset the 12 flip-flops which control the illumination of the
colored background (message 12) on the Matrix B Readout switches.
(7) Reset the 12 flip-flops which control the illumination of the
coolered background (message 12) on the Matrix C Readout switches.
(8) Set or reset one of 44 flip-flops. Each flip-flop shall control
the illumination of the colored background on one of the 44 computer lit Monofunction switches. An
output from each of the flip-flops shall be supplied to the TACCO Tray.
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