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3 paź 2011 · According to Bob Dubke, one of the IBM 5100 engineers, this function was hidden “because of worries about how [IBM’s] competition might use it.” That piece of the story is verifiably correct.
According to Bob Dubke, the second engineer on IBM's 5100 team in Rochester (who now co-owns a locally-based company called eXport Ventures Corp. and also works for Edina Realty), that secret function was his contribution to the design of the computer.
The 5100 has an internal CRT (five-inch diagonal) and displays 16 lines of 64 characters. IBM provided an option switch to allow the user to display all 64 characters of each line, or only the left or right 32 characters (interspersed with spaces).
If I were to acquire my own "IBM 5100" with the APL module through an auction, I could finally put the theory of “secret functionality” to the test. Unlike museums, I would disassemble it meticulously, documenting every detail.
The IBM 5100s hidden functions are what was kept a secret. Because of contract law, protecting IBMs profits and the fact this function only appeared on SOME versions of the model (the most expensive version) it wasnt top secret stuff but it wasnt exactly advertised.
22 lis 2022 · The IBM 5100 combines two legacy “line printer” systems into a more compact “CRT-based” system, with a compact digital data-storage tape unit. The IBM 5100 “Executive ROS” is written in... Est. reading time: 4 minutes. Some topic highlights: how to replace the PSU with modern components.
23 sie 2022 · The IBM 5100 had a brief three-year life from 1975 to 1978. A blistering 1.9 MHz 16-bit CPU drove a 5-inch CRT monitor and you could have between 16K and 64K of RAM along with a fair amount of...
