Showing posts with label Altair 8800. Show all posts
Showing posts with label Altair 8800. Show all posts

Monday, 29 January 2024

1975, Science and Technology: Altair 8800

MITS (Micro Instrumentation and Telemetry Systems) produced one of the first PCs, the Altair 8800, with one kilobyte (KB) of memory. The computer could be ordered as a mail-order kit for 397€ or assembled for 562€.

Altair 8800
Altair 8800 connected to a terminal for programming and display output

The Altair 8800 was developed by Ed Roberts, based on the Intel 8080 CPU. It was the first commercially successful personal computer. The Altair could be programmed using its front-panel switches, or alternatively if it had a serial interface card installed, it could be connected to a terminal for programming and display output.

Ed Roberts

Bill Gates, Paul Allen, and Monte Davidoff announced Altair BASIC, designed for the Altair computer, on January 2, 1975. The language became the first computer programming language for personal computers.

Altair 8800 advert
Altair 8800 advert

Sunday, 13 April 2014

1976, Science & Technology: “Electric Pencil”

In December 1976 the first word processor for home computers, "Electric Pencil", is released by Michael Shrayer. The original version was created for the MITS Altair 8800 in December 1976.

The TRS‑80 (Tandy/Radio Shack, Z-80 microprocessor) version was released almost two years later and it dominated the market until the introduction of "Scripsit" by Tandy/Radio Shack in 1978.

Michael Shrayer
Michael Shrayer purchased an MITS Altair 8800 computer kit in 1975. He expanded the Altair with a paper punch, video display, and keyboard and began writing machine language programs. What became known as "Electric Pencil" started as an improvement to an editor assembler package called "Software Package 1" or "SP-1". Shrayer decided he didn’t want to use a typewriter to write the documentation for "SP-1" but to use his Altair instead. There were no suitable programs available, so he decided to write his own.
MITS Altair 8800
The "Electric Pencil" program was quite unique and Shrayer began selling it through his own company, Michael Shrayer Software, Inc. By 1980 78 different versions were created for different home computers and operating systems. "Electric Pencil" remained on the market into the 1980s, including a version for the IBM PC in 1983.
"Electric Pencil" 2.0