Documentation, TRW-130 AN/UYK-1 Digital Computer Coding Card
name: label: maker
content: Thompson Ramo Wooldridge Inc.
notes: label: Description
content: This code card assisted with the programing of TRW-130 computers made by Thompson Ramo Wooldridge, Inc. It includes the octal and decimal equivalents for common logand codes. The word “logand” was a computer acronym for “logical command” the intermediate level programming language planned in the design of the TRW-130 computer.
label: Description
content: The donor, who programmed TRW-130 computers, shares the following:
label: Description
content: “Logan programming allowed assembly languages to be developed for specific applications. … . Most programmers never saw the logans because they used one of these specialized assembly languages.
label: Description
content: I did most of my programming in logans, however. The logan code was extremely difficult. One had to understand how the machine operated at the flip-flop and gate level. Each instruction was at the clock level and one had to understand what the hardware was doing at each clock cycle. If you made a mistake, the error was difficult to find. The machine basically went nuts. It started doing things that it was never supposed to do. Every bit configuration in the machine was executable. One could easily create a function which you had no idea what would happen. It was not unusual to make a mistake that caused the machine to branch into data, and since every bit configuration was executable, the machine would start executing data thinking it was instructions.”
label: Description
content: Reference:
label: Description
content: Nonccession file 2015.3097.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Computers
label: See more items in
content: Computers & Business Machines
creditLine: label: Credit Line
content: Gift of R. Kirk Lubbes
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2015.3097.10
label: nonaccession number
content: 2015.3097
label: catalog number
content: 2015.3097.10
objectType: label: Object Name
content: documentation
physicalDescription: label: Physical Description
content: paper (overall material)
label: Physical Description
content: plastic (overall material)
label: Measurements
content: overall: .1 cm x 7.5 cm x 15.8 cm; 1/32 in x 2 15/16 in x 6 7/32 in