The IBM 1401 compiles and runs FORTRAN II

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14 Dec 2023

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We attempt to compile and run a simple FORTRAN program on our vintage 1959 IBM mainframe computer at the Computer History Museum. FORTRAN is a big stretch for this business oriented machine, with 16k memory and a CPU not meant at all for scientific applications. Even integer multiply and divide instructions are an optional feature on the base machine! Success not guaranteed. Come see the IBM 1401 computer at the Computer History Museum in Mountain View, California, USA: Simulation and programming environment available here: Mike Albaugh has made a page that explains how to run the same demonstration in the SIMH simulation: Some pointers on how to start programming the IBM 1401 on my website (work in progress): Details on this implementation of FORTRAN: IBM 1401 FORTRAN compiler source code: E-mail exchanges with the original developers of the IBM 1401 FORTRAN: Official CHM IBM 1401 Video: More CuriousMarc IBM 1401 videos: Our sponsor for PCBs: Support the team on Patreon: Merch on Teespring: Learn more on companion site: Contact info:

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