Using USB to power old mobile/handheld computers
I took my old (1989 vintage) laptop out for a coffee to send some tweets & emails 🙂
Bringing an old analog (1G) Cleartone CTN9000 mobile phone handset back to life with the aid of a software-defined radio (Lime SDR) and osmocom_analog.
An app written in 1996 to simulate making voice calls from a Psion Series 3a.
5250 days later – booting an old pentium computer that’s been in storage for ~14.5 years. This filthy beast used to be the defender of the home network running the Smoothwall GPL firewall.
Poking around in the old Psion SIBO SDK debugger – which looks like it’s based heavily on the MC’s GUI…
Re-purposing an old Psion MC400 laptop mechanical keyboard from 1989 to work with USB via a Teensy LC (Arduino compatible) microcontroller
Emulating a Psion MC400 over 30 years later – a 1989 80C86 based laptop being brought back to life in MAME.
Update on the Raspberry Pi/Grafana/Influxdb/DS18B20 temperature monitoring network I put together 2 years ago…
One of the many promises of 5G is accurate time-transfer. I spent a couple of days travelling around the North West of England testing exactly how accurate available time transfer was from commercially deployed 5G installations.
So the Raspberry Pi has been around for 10 years… everyone’s favourite credit-card-sized computer does just about everything
A look at what state-of-the-art mobile text processing for journalists was like in the mid 1990s – the Psion MC400 EROS system.
A long time ago I built a VOIP PBX. I’ve been wanting to build & use another for a long time and finally got round to it with a £10 Cisco phone and £14 USB dongle…
In honour of the regular El Reg feature which looks like it’s coming to an end… here’s my tiny collection of borked signage:
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…
Comparing comments (or the lack of them!) in software from 1969 & 1984. NASA’s Apollo Guidance Computer versus Elite for the BBC Model B 🙂
As a teenager in the 1980s I was obsessed with Maxell tapes, and the brand Maxell in general. Here’s my homage to Maxell Holdings, Ltd.
A summary of all the things that are right with my 1991 Psion MC400 laptop, “online” via an attached Raspberry Pi 3B+ and wifi…
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….
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 🙂
Some patterns…. the beauty in repetitive patterns, in nature and in art.
Was 1981 pop music’s greatest ever year? There’s no doubt for me – it absolutely was! Débuts from several of the decade’s biggest names, Eurovision Winners and a novelty No.1, 1981 had it all.
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 😦
NASA has ambitions to build a comms infrastructure on the moon using 4G LTE technology…
Something went wrong. Please refresh the page and/or try again.
About Room 7609
Hi, and welcome to Zed Starr’s compendium of techno-bizzle. Sometimes a bit retro, or getting retro stuff to do things in “modern life”; featuring Raspberry Pi, Linux, GNSS, analogue audio/Hi-Fi, old Psion computers and with an overall electronics flavour. And no, I’m not sure exactly what “techno-bizzle” is either… Enjoy!
Subscribe to My Blog
Get new content delivered directly to your inbox.