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UNIVAC 418
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UNIVAC 418
The UNIVAC 418 was a transistorized computer made by Sperry Univac. It had 18-bit words and used magnetic-core memory. The name came from its 4-microsecond memory cycle time and 18-bit word. The assembly language for this class of computers was TRIM III and ART418.
Over the three different models, more than 392 systems were manufactured. It evolved from the Control Unit Tester (CUT), a device used in the factory to test peripherals for larger systems.
The instruction word had three formats:
Numbers were represented in ones' complement, single and double precision. The TRIM assembly source code used octal numbers as opposed to more common hexadecimal[citation needed] because the 18-bit words are evenly divisible by 3, but not by 4.
The machine had the following addressable registers:
All register values were displayed in real time on the front panel of the computer in binary, with the ability of the user to enter new values via push button (a function that was safe to perform only when the computer was not in run mode).
The first UNIVAC 418-I was delivered in June 1963. It was available with 4,096 to 16,384 words of memory.
The 418-I was also available in a version for the military known as the UNIVAC 1218. It was almost 6 feet tall and weighed 775 pounds (352 kg). It required both 115VAC, one-phase, 60 Hz and 115VAC, three-phase, 400 Hz power.
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UNIVAC 418 AI simulator
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UNIVAC 418
The UNIVAC 418 was a transistorized computer made by Sperry Univac. It had 18-bit words and used magnetic-core memory. The name came from its 4-microsecond memory cycle time and 18-bit word. The assembly language for this class of computers was TRIM III and ART418.
Over the three different models, more than 392 systems were manufactured. It evolved from the Control Unit Tester (CUT), a device used in the factory to test peripherals for larger systems.
The instruction word had three formats:
Numbers were represented in ones' complement, single and double precision. The TRIM assembly source code used octal numbers as opposed to more common hexadecimal[citation needed] because the 18-bit words are evenly divisible by 3, but not by 4.
The machine had the following addressable registers:
All register values were displayed in real time on the front panel of the computer in binary, with the ability of the user to enter new values via push button (a function that was safe to perform only when the computer was not in run mode).
The first UNIVAC 418-I was delivered in June 1963. It was available with 4,096 to 16,384 words of memory.
The 418-I was also available in a version for the military known as the UNIVAC 1218. It was almost 6 feet tall and weighed 775 pounds (352 kg). It required both 115VAC, one-phase, 60 Hz and 115VAC, three-phase, 400 Hz power.