AN/UYK-8


The AN/UYK-8 was a UNIVAC computer built to replace the CP-808 in the Beach Relay Link-11 communication system, the AN/TYQ-3 in a AN/TYA-20 shelter.
In accordance with the Joint Electronics Type Designation System, 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.

Development

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.

Technical

It used the same 30-bit words and instruction set as the AN/USQ-17 and AN/USQ-20 Naval Tactical Data System computers, built with "first generation integrated circuits". This made it about one quarter of the volume of the AN/USQ-20. It had two processors instead of just one.
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
s 2 bits which S register to use S0,S1,S2,S3
y 13 bits operand address in memory
memory address = Bb + Ss + y = 18 bit
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 of magnetic core memory.
The available processor registers were: