University of Utah 1 Minicomputers Embraced microchip technology Minicomputers flood market in late 1960s, early 1970s.

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Presentation transcript:

University of Utah 1 Minicomputers Embraced microchip technology Minicomputers flood market in late 1960s, early 1970s

University of Utah 2 Minicomputers New standard -16-bit word length

University of Utah 3 Not DEC! Computer Controls Corporation -DDP-116 (1964) -First 16-bit minicomputer

University of Utah 4 Interesting Footnote Honeywell DDP-516 -Descendent of DDP-115 -Used in ARPANET precursor to Internet -IMP (interface message processor) for main computers

University of Utah 5 What's DEC doing? PDP-X (16-bit) -designed by Edson DeCastro Rejected by DEC management DeCastro leaves (1968)

University of Utah 6 Data General Founded by Edson DeCastro “Nova” computer (1968) -16-bit word length -integrated circuits

University of Utah 7 Chips as memory? Pioneered by Illiac IV (1970) Data General “Super Nova” (1971) Beginning of end for core memory

University of Utah 8 Intel Founded 1968 by ex-employees of Fairchild Semiconductor -among whom is Robert Noyce Intel = “Integrated Electronics” 1K RAM chip (1970)

University of Utah 9 Burroughs Started out making mechanical calculators Entered computer business in bought out Electrodata -First computer: B205

University of Utah Burroughs Started out making mechanical calculators Entered computer business in bought out Electrodata -First computer: B205 The Bat Computer!

University of Utah Burroughs Designed hardware around software! -B5000 (1961): designed for ALGOL used virtual memory! -B2000 (1962): designed for COBOL

University of Utah Burroughs Distant second to IBM Barely mentioned in our textbook -Why?

University of Utah Burroughs Merged with Sperry (owner of UNIVAC) in 1986 Unisys!

University of Utah Back to DEC PDP-11 (1970) -16-bit word length -bus connects all units

University of Utah PDP-11 Most popular minicomputer of all time >170,000 sold during 1970s $10,000

University of Utah PDP-11 First minicomputer to support high-level programming languages -PDP-1 and PDP-8 used assembly Time-sharing

University of Utah PDP-11 First minicomputer to support high-level programming languages -PDP-1 and PDP-8 used assembly Time-sharing Watch out, mainframes!

University of Utah PDP-11 Look at manuals

University of Utah PDP-11: Notables UNIX was implemented on a PDP-11 -(okay, it was actually a PDP-7)

University of Utah PDP-11 Gallery

University of Utah PDP-11 Gallery

University of Utah PDP-11 Gallery

University of Utah “Test Question” On a scrap of paper, write a question that encapsulates one of the points from today's class, and turn it in. (Put your name on it!)‏

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