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The AN/UYK-8 was a UNIVAC computer built to replace the CP-808 (Marine Corps air cooled AN/USQ-20 variant) in the Beach Relay Link-11 communication system, [1] the AN/TYQ-3 in a AN/TYA-20 shelter. [2]
In accordance with the Joint Electronics Type Designation System (JETDS), the "AN/UYK-8" designation represents the 8th design of an Army-Navy electronic device for general utility data processing computing equipment. The JETDS system also now is used to name all Department of Defense electronic systems.
In April 1967, UNIVAC received a contract from the US Navy for design, development, testing and delivery of the AN/UYK-8 microelectronics computer for use with the AN/TYA-20. [3]
It used the same 30-bit words and instruction set as the AN/USQ-17 and AN/USQ-20 Naval Tactical Data System (NTDS) computers, built with "first generation integrated circuits". This made it about one quarter of the volume of the AN/USQ-20. [1] It had two processors instead of just one. [1]
Instructions were represented as 30-bit words, in the following format:
f 6 bits function code j 3 bits jump condition designator k 3 bits partial word designator b 3 bits which seven index register to use (B0=non used) s 2 bits which S (5bits) register to use S0,S1,S2,S3(P(17-13)) y 13 bits operand address in memory memory address = Bb + Ss + y = 18 bit (262,144 words)
Numbers were represented as full 30-bit words. This also allowed for five 6-bit alphanumeric characters per word.
The main memory was increased to 262,144 words (256K words) of magnetic core memory.
The available processor registers were:
Under contracts NOw 66-063 awarded on 24 June 1966 and NO0024-67-C-1361 awarded on 28 April 1967, the UNIVAC Division of the Sperry Rand Corporation (UNIVAC) developed the CP-901 computer for use in the ANEW project, and the AN/UYK-8 microelectronics computer for use with the AN/TYA-20