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Page Title: Figure 14. Format of Output Word to Pilot Keyset Logic from Digital Output Multiplexer
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MIL-D-81347C(AS)
Format of Output Word to Pilot Keyset Logic from Digital Output
3.5.1.4.5.5.2
Multiplexer - Refer to Figure 14.
Figure 14.
Format of Output Word to Pilot Keyset Logic from Digital Output Multiplexer
(1) Field A- Specifies which one of the following operations is to
be performed.
(a) Field C contains illumination control data a for a particular
group of four computer lit monofunction switches and shall be stored in the appropriate register. There
are four Field A codes required for this purpose since there is a total of 16 computer lit Monofunction
switches.
(b) Field C shall be stored in the spare storage register
(fifth register). This register shall be utilized only in test loop operation.
(c) Reset all five storage registers.
In addition to one of the operations described above, Field A
shall enable or disable (depending upon Field B) one of the test loops in the Logic Subunit.
(2) Field B - a logical "1" shall enable the test loop specified by
Field A. A logical "0''shall disable the test loop specified by Field A. This bit is stored in the same
register as the Field C bits.
(3) Field C - The interpretation and storage location of Field C
depends upon Field A.
Format of Output Word to CRT Tray Logic from Digital Output
3.5.1 .4.5.5,3
Multiplexer - Refer to Figure 15.
(1) Field A- Specifies which one of the following operations is to
be performed.
(a) Field C is a message combination selection code for the
Matrix Readout switches and shall be stored in the appropriate register.
(b) Field C contains illumination control data for a particular
group of four computer lit Monofunction switches and shall be stored in the appropriate register. There
are two Field A codes required for this purpose since there is a total of eight computer lit Monofunction
switches.
(c) Field C contains data for the illumination control of the
colored background messages on a particular group of four Matrix Readout switches and shall be stored
in the appropriate register. There are two Field A codes required for this purpose since there is a
total of eight Matrix Readout switches.
47

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