Hardware Description
A variety of UNIVAC embedded computers, including the first fielded version of the late 1950s, the CP-642A (AN/USQ-20), typically with 30 bit words, 32K words of magnetic core memory, 16 parallel I/O channels (also 30 bits wide) connected to radars and other peripherals, and a RISC-like instruction set, were used. Logic circuits used discrete transistors and other elements soldered to a printed circuit board with connectors running along one side. Each card was coated in a varnish-like substance to prevent exposure to corrosion-inducing salt spray. A number of cards were connected and secured to a tray on rollers. In turn, several trays of various types, interconnected and secured to a metal enclosure, constituted the computer. Most NTDS computers were water-cooled, though some later lighter-weight models were air-cooled.
Read more about this topic: Naval Tactical Data System
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