0

October 7, 2014 AT 12:02 pm

Early Digital Research CP/M Source Code #makereducation

Imsai DSC1239as

David Laws published this piece as a part of the Computer History Museum’s source code series:

By the time personal computers based on microprocessors began to emerge in the mid-1970s, programmers had been writing operating systems – the software that manages the computer hardware and provides commonly used services for application programs – for about twenty years. Big mainframe computers had operating systems that were huge and complicated, created from hundreds of thousands of lines of code. But other operating systems, designed to fit in the small memory of minicomputers, were tiny. That was the kind that the PCs could use.

Computer Scientist Gary Kildall created just such an operating system in 1974 for a small computer called the “Intellec-8” that Intel had designed to showcase their new microprocessors. Called “CP/M”, it was unlike most other operating systems for small computers because it was written in PL/M, a portable higher-level language that he had designed earlier, rather than in the assembly-language of a particular computer. That meant that CP/M could be ported to run on many different personal computers. And if the applications were written in PL/M, they could be ported as well.

Read more.


Adafruit_Learning_SystemEach Tuesday is EducationTuesday here at Adafruit! Be sure to check out our posts about educators and all things STEM. Adafruit supports our educators and loves to spread the good word about educational STEM innovations!


Check out all the Circuit Playground Episodes! Our new kid’s show and subscribe!

Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground”Adafruit’s Apps!


Maker Business — Steve Ballmer Serves Up a Fascinating Data Trove

Wearables — Chalk it up

Electronics — Look to ferrites (no, not ferrets, the European polecat) when faced with high frequency

Biohacking — A Run in the Altra IQ Smart Shoes

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.