#computerhistory

hankg@friendica.myportal.social

My first apps pushing real memory requirements, "hundreds of KB to MB", were on Unix systems. The second was Windows 95. The peculiarities of PC memory issues were just running config tools to get Tie Fighter running. Seeing it spelled out so painfully makes me glad I missed all that. #history #ComputerHistory #programming #RetroComputing
From 0 to 1 MB in DOS

hankg@friendica.myportal.social

I've been a bit Apple Lisa fan for some time. I even own one. I was a customer of Sun Remarketing back in the day too. It is interesting to see how they got started, the deals they made with Apple, and to learn a lot more about the landfill trashing of them (a la the E.T. Atari Cartridges). If you've never heard of Lisa this goes into the backstory very well too. #ComputerHistory #AppleLisa #apple
Lisa: Steve Jobs’ sabotage and Apple’s secret burial | FULL DOCUMENTARY

hankg@friendica.myportal.social

The title of the video is "Birth of BASIC" but it is really as much or more about the birth of computing in the university setting and the creation of the Dartmouth Time Sharing System to make it far more accessible. I had no idea the first version of DTSS was written by undergraduate interns (basically). Lots of wonderful insights and anecdotes about design decisions, what it was like to be working on it, and the feeling of seeing the first time two teletype terminals interfaced with the system to run the new BASIC Development Environment concurrently #history #BASIC #ComputerHistory #RetroComputing #Dartmouth https://youtu.be/WYPNjSoDrqw

shaungriffith1964@pluspora.com

First Computing Conference?

Amazeballs

The Los Alamos peak moment was the brilliant lecture on the British WW II Colossus computing engines by computer scientist and historian of computing Brian Randell. Colossus machines were special-purpose computers used to decipher messages of the German High Command in WW II. Based in southern England at Bletchley Park, these giant codebreaking machines regularly provided life-saving intelligence to the allies. Their existence was a closely-held secret during the war and for decades after. Randell's lecture was — excuse me — a bombshell, one which prompted an immediate re-assessment of the entire history of computing. Observes conference attendee (and inventor of ASCII) IBM's Bob Bemer, "On stage came Prof. Brian Randell, asking if anyone had ever wondered what Alan Turing had done during World War II? From there he went on to tell the story of Colossus — that day at Los Alamos was close to the first time the British Official Secrets Act had permitted any disclosures. I have heard the expression many times about jaws dropping, but I had really never seen it happen before."

https://computerhistory.org/playlists/international-research-conference-on-the-history-of-computing/

#computerhistory #colossus

eds@diaspora.glasswings.com

Adapt and Survive is a (slim) #computerhistory book with lots of #retrocomputing detail. So I bought a copy, and learnt all about Business Computers Limited…

1970s minicomputer installation

… of Brighton, on the south coast of England and not well-placed to serve their customers. They made a couple of drum-based machines (SADIE and SUSIE) and then moved into core memory with MOLLY, aka the Molecular 18. It’s an 18 bit machine, with parity, so 17 bits net - just enough for each word to encode 3 characters from a 50-character set. You can run up to 8 input stations if you spring for the 32k word core option. You’ll be running LOS, the Leicester Operating System. BCS programmed the machine very much at bare metal level - there was never a high level language or even a filing system. Multiple programs could be loaded at once, but each copy had to be adjusted first to occupy a different part of memory - no load-time relocation, no relative addressing. The architecture had a very long life, into the 90s, mostly being programmed by BCS and sold as an appliance. In a sense it lived longer than the company, which had to reborn a couple of times after running out of money.

Book cover shows minicomputer installations

If you don’t have the book - it's avaliable from the TNMoC shop - try the BCL Computers website. Loads of detail, original press, and user stories within. Or, visit The National Museum of Computing in Bletchley and buy a copy from the gift shop!

(Posted previously from my pluspora account)