Documentation, Programming Manual for the Bunker-Ramo Model 130 and Model 133 Digital Computers
date: label: date made
content: 1965
name: label: maker
content: Bunker-Ramo Corporation
notes: label: Description
content: This spiral-bound document is a copy of the programing manual for Bunker-Ramo computer models 130 and 133. These models were the basis for the computers the company built for military applications.
label: Description
content: According to the donor who wrote programs for a BR-130, "The TRW-130 (also known as the BR130) was the most interesting machine that I have ever programmed. Normally the lowest level language is an assembler language. In an assembly language, each assembly instruction performs a single function, e.g. add, subtract, compare, branch, shift, etc. There are no more basic operations. These instructions are hardwired in the machines physical architecture. In those early days, the physical architecture was made up of gates, flip-flops, registers, etc., prior to integrated circuits. There were only a limited number of these component types, so the various hardwired instructions were made up of fixed combinations of these. Therefore there was significant duplication of these components. TRW engineering came up with a very clever idea. Could a lower level of software be used to implement the assembly level instructions by causing these components to be combined/reorganized in real-time to execute the entire instruction set? The answer was yes. It allowed for a cheaper and more versatile machine. I cannot remember, but I believe these lower level instructions were called ‘logans’." (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: Reference:
label: Description
content: Nonccession file 2015.3097.
label: Location
content: Currently not on view
place: label: place made
content: United States: California, Los Angeles, Canoga Park
setName: label: See more items in
content: Medicine and Science: Computers
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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: 2015.3097.09
label: nonaccession number
content: 2015.3097
label: catalog number
content: 2015.3097.09
objectType: label: Object Name
content: documentation
physicalDescription: label: Physical Description
content: paper (sheets material)
label: Physical Description
content: plastic (spiral bindint material)
label: Measurements
content: overall: 1.6 cm x 23 cm x 28 cm; 5/8 in x 9 1/16 in x 11 1/32 in