Computer History IBM System 360 READ ONLY STORAGE 1965 Technical Lecture Mainframe Memory Card ROM

Computer History: For review and discussion today, we examine an original Confidential IBM very technical lecture circa 1964 “IBM System/360 Read Only Storage.” (IBM Poughkeepsie) The speaker, T.F. Slagsvol, an electrical engineer, describes ADVANTAGES and FUNCTIONS of Read Only Storage used in System/360 mainframe. Read Only Storage also called Read Only Memory (ROM), for Micro-instructions and micro-programming applications. It describes how the three types of read only storage function in System/360, and the advantages of read only storage over conventional circuitry and its role System/360 downward compatibility. Views of card capacitor, transformer, and balanced capacitor read only storage are included with pictures of the System/360 computer systems in which they furnish the control function. Runs about 30 mins, with IMAGE GALLERY at end. Part of IBM’s “Topic of the Week” series. © IBM circa 1964. Partly restored and uploaded for historical and educational value and comment, Computer History Archives project – CHAP. Comments are welcome! 2k and 4k Stock Footage available from Periscope Film http://www.periscopefilm.com ---Recommended for More Information: Glenn’s Computer Museum https://www.glennsmuseum.com/items/ib... Ken Shirriff's blog TROS: How IBM mainframes stored microcode in transformers https://www.righto.com/2019/11/tros-h... IBM Hursley Museum online, UK (virtual tour) https://ibmhursleymuseum.info/ IBM Heritage – IBM Archives https://www.ibm.com/history/system-360 Video: Remembering the IBM System/360 Computer History Archives Project    • 1960's COMPUTER HISTORY: REMEMBERING IBM S...   “The 360 Revolution,” by Chuck Boyer, 63 pages, online (The Computer History Museum) https://archive.computerhistory.org/r... BOOK: IBM's 360 and Early 370 Systems, by Emerson W. Pugh, L.R. Johnson, J.H. Palmer, Aspray (Ed.), MIT Press 1991 FILM NARRATOR is Thomas Frederick Slagsvol, BSEE (1922-2015) An electrical engineer with a 38 year history with IBM in technical and management positions.