GLOSSARY - TM-11-6625-2937-130098

TM 11-6625-2937-13

GLOSSARY

Accumulator

The MPU contains two 8-bit accumulators that are used to hold operands and

results from an arithmetic logic unit (ALU).

Address Bus

Provides 16-bit address information (AO-A15) which is used by the address

decoder to access memory.

ALU

Arithmetic logic unit. Logic functions and arithmetic are performed in this part of

the MPU.

Analog test adapter

Test Adapter MX-10062/U. The test adapter is basically a breakout box that is

used at depot maintenance to gain access to module connector pins of an analog

circuit card under test.

Bus available. Normally in the low state (BA). When activated, it goes to the high

state (BA), indicating the MPU has stopped and that the address bus is available

Bit

Binary digit. A binary digit may be a 0 (zero) or a I (one).

BITE

Built in test equipment. That portion of the equipment used to check for proper operation.

BUS

A signal path or group of paths or signal lines.

BYTE

A binary word that is eight-bits long.

Cable W1

Cable assembly, power, electrical W1. Cable WI is a four-wire cable assembly a p-

proximately 72 inches long.

Cable W2

Cable assembly, special purpose, electrical W2. Cable W2 is a 156-wire cable as-

sembly approximately 36 inches long.

Cable W3

Cable assembly, special purpose, electrical W3. Cable W3 is a 44-wire cable as-

sembly approximately 48 inches long.

Cable W4

Cable assembly, special purpose, electrical W4. Cable W4 is a 10-wire cable as-

sembly approximately 48 inches long.

CCR

Condition code register. This 8-bit register indicates the results of an arithmetic

logic unit operation (negative, zero, overflow, carry, etc).

Circuit card assembly rack 1A2

Comprised of a front panel and circuit card rack. The circuit card rack contains

seven circuit cards necessary to the operation of the control-interface unit.

Control bus.

Three pins are used for the control bus It provides control signals 02, R/W and

VMA (VUA).

Control-interface unit

Test Set, Electronic Systems TS-3796/UKM-4.

Data bus

Eight pins are used for the data bus. It provides data (DO-D7) transfer to and

from memory.

Data link tester

Test Set, Electronic Systems AN/UKM-4.

Data word

A byte, or pattern of eight bits, that represents a binary number rather than an in

struction.

DEC

Decoder, Video KY-871/TKQ2B.

DEC module test

Power is applied to the module test connector for decoder standard logic card or

microprocessor card test.

DEC unit test

Power is applied to the unit test power connector for decoder unit testing.

Digital tester

Test Set, Electronic Systems AN/UYM-7.

Electrical equipment housing

Contains three power supplies, an input power line filter assembly and a circuit

1A1

breaker.

ENC

Encoder, Video KY-865/AKT-18B.

ENC module test

Power is applied to the module test connector for encoder standard logic card or

microprocessor card test.

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