retro-computers – Page 2

Psion MC400 ROM dump & emulation development

Emulating a Psion MC400 over 30 years later – a 1989 80C86 based laptop being brought back to life in MAME.

The Psion MC400 EROS – Tandy TRS-80 model 200 replacement?

A look at what state-of-the-art mobile text processing for journalists was like in the mid 1990s – the Psion MC400 EROS system.

Emulating the Psion MC400

I read an online post about creating an “MC400 emulator”. That got me thinking about the ROM, and the 28F010 flash chips that realise it…

A Tale of Two Sources: NASA vs. Braben & Bell

Comparing comments (or the lack of them!) in software from 1969 & 1984. NASA’s Apollo Guidance Computer versus Elite for the BBC Model B 🙂

Using a 30 year old laptop in 2021: The Psion MC400…

A summary of all the things that are right with my 1991 Psion MC400 laptop, “online” via an attached Raspberry Pi 3B+ and wifi…

My Linux life: a retrospective

As of July 2021 Linux has been around for 30 years. For almost all of that time I’ve been installing Linux on just about anything I possibly can….

Psion MC400 – retro computing via RS232 to Raspberry Pi – handshaking fixed…

Getting the 1990s era Psion MC400 laptop online via an attached Raspberry Pi and some custom shortened Psion serial-USB cables… Tweets, Emails, BBC News & screenshots! All in glorious monochrome and at 19200 baud 🙂

RS232 flow-control & handshaking – Psion MC400 retro communications

Connecting my retro-laptop to the internet via 2 x RS232 serial connections to a Raspberry Pi… and defeated (for now) by lack of hardware flow-control signals 😦

“My Life in Laptops” – am I Doug Rocket?

My homage to Doug Rocket’s art installation at Place “MY LAPTOPS 1991-2005”. It’s well Mexico.

Magellan GPS 315 vs. The Future – part 2

Some older GPS receivers can’t compute dates properly thanks to the original GPS system employing an epoch with 10-bit week number… a new epoch starts every 1024 weeks!