University

of Utah

11

Meanwhile...

• Wang’s word processors- for the workplace

• Xerox’s GUIs- a research curiosity

• What computers are people using at home?

University

of Utah

22

Personal Computers

• Round 1 (early 1970s)- Build-it-yourself kits- Altair MITS and clones

• Round 2 (1977)- TRS-80- Commodore PET- Apple II

University

of Utah

33

TRS-80

• Tandy Corporation (1919)- leather supplies

• Radio Shack (1921)- ham radio supply stores

University

of Utah

44

TRS-80

• Tandy Corporation (1919)- leather supplies

• Radio Shack (1921)- ham radio supply stores

• Tandy buys Radio Shack (1963)

University

of Utah

55

TRS-80

http://www.vintage-computer.com/images/trs80mod1system.jpg

University

of Utah

66

TRS-80

• Zilog Z80 processor• 4K or 16K memory• Two versions of BASIC• $599 (for 4K version)

- including monitor and tape recorder

University

of Utah

77

TRS-80

• catalog

University

of Utah

88

Commodore

• Began in 1954- Manufacturer of calculators

• 1976 – Buys MOS Technology, Inc.- Maker of 6502 microchip

University

of Utah

99

Commodore PET

http://techrepublic.com.com/2347-10877_11-1477-1478.html?seq=1

University

of Utah

1010

Commodore PET

• “Personal Electronic Transactor”• 6502 Processor• 4K or 8K versions• BASIC (Microsoft)• Built-in cassette drive• “chiclet” keyboard• $595

University

of Utah

1111

Commodore PET

• demo

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of Utah

1212

Gentle reminder

• Essay rough draft due Friday!

University

of Utah

1313

Midterm

• Return and discuss

University

of Utah

1414

“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!)