Object Details
- Thompson Ramo Wooldridge Inc.
- Description
- 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.
- The donor, who programmed TRW-130 computers, shares the following:
- “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.
- 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.”
- Reference:
- Nonccession file 2015.3097.
- Location
- Currently not on view
- Credit Line
- Gift of R. Kirk Lubbes
- ID Number
- 2015.3097.10
- nonaccession number
- 2015.3097
- catalog number
- 2015.3097.10
- Object Name
- documentation
- Physical Description
- paper (overall material)
- plastic (overall material)
- Measurements
- overall: .1 cm x 7.5 cm x 15.8 cm; 1/32 in x 2 15/16 in x 6 7/32 in
- See more items in
- Medicine and Science: Computers
- Computers & Business Machines
- National Museum of American History
- Record ID
- nmah_1764350
- GUID (Link to Original Record)
- https://n2t.net/ark:/65665/ng49ca746b2-4198-704b-e053-15f76fa0b4fa
