The KING JIM Pomera DM250 "digital typewriter" is a small Linux-powered ARM computer that boots up into a custom word processor application. I've been tinkering with it to try to get OpenBSD booted on it. I'd normally wait until the end and write up a proper article explaining everything, but this process is taking a lot longer than I expected so I figured I'd document it all as I go.
A year ago I tried using an M1 iMac for work duty but its 21" screen took up too much room on my desk. After seeing Sean's video on Action Retro about putting an M4 Mac Mini inside an iMac G4, I thought I'd give it a try.
I wanted to add an internal USB port to my ThinkPad X1 Nano which should have been a fairly easy thing to do, but it wasn't.
Of course, if I were still using my Framework Laptop it would be as easy as plugging in a custom module but I've been using my X1 Nano as my primary laptop for quite some time now.
My old 2017 Huawei MateBook X has been my most reliable laptop and continued to be my daily-use workstation despite trying half a dozen others (and a desktop or two) in the past four years. Every time I'd try a new laptop, certain components wouldn't work properly, or the keyboard would feel strange, or the screen quality would be poor, or a constantly-running fan or some coil-whine noise would drive me nuts. And every time, I'd return to my trusty MateBook X and everything would just work silently.
I finally have a newer model of the MateBook X and I'm happy to say it lives up to its predecessor and has replaced my 2017 model.
Framework is a new company offering a laptop that is designed to be repairable and upgradeable, both in terms of internal components like the screen and motherboard, and in pluggable expansion cards.
After the disappointment of my X1 Nano and learning that all future Intel "Evo"-branded laptops would lack S3 suspend, I started thinking about returning to my M1 MacBook full-time or building an OpenBSD desktop. I chose the latter, building my first desktop machine in many years.
I've created an adapter for the Cidco MailStation Z80 computer which adds the ability to use WiFi for data transfer, code uploading, and to act as a WiFi modem for my msTERM terminal emulator.
Lenovo has finally made a smaller version of its X1 Carbon, something I've been looking forward to for years.
I recently came across an unused Dove Computer MacSnap RAM upgrade on eBay, so I bought it and installed it in my Mac 512Ke to bring its RAM up to 1 MB.
Last year I wrote about the Cidco MailStation and how I was using it as a Z80 development platform. One of the biggest hurdles to running code on them is that it must be uploaded over the MailStation's parallel port with a LapLink cable and some custom software (although it's certainly easier than having to pull and flash a chip).
I recently created a USB data loader device that allows for easier development from a modern computer and implements the MailStation's custom data encoding routines in its firmware.
Back in 2017, I bought an Arduboy, a fun little Arduino development system which integrates an ATmega32U4 8-bit CPU, 32 KB of flash storage, 2 KB of RAM, a 128x64 pixel OLED display, some buttons, a speaker, and a battery in a Gameboy-like package.
OpenBSD had an
old Arduino package
available without the
Arduino IDE, and it instead included
a custom
Makefile
for end-users to build off of for compiling projects.
But it was all pretty old and crufty and kind of sucked the fun out of tinkering
with a new piece of hardware.
Another year, another ThinkPad X1 Carbon, this time with a Dolby Atmos sound system and a smaller battery.
The Cidco MailStation is a series of dedicated e-mail terminals sold in the 2000s as simple, standalone devices for people to use to send and receive e-mail over dialup modem. While their POP3 e-mail functionality is of little use today, the hardware is a neat Z80 development platform that integrates a 320x128 LCD, full QWERTY keyboard, and an internal modem.
After purchasing one (ok, four) on eBay some months ago, I've learned enough about the platform to write my own software that allows it to be a terminal for accessing BBSes via its modem or as a terminal for a Unix machine connected over parallel cable.
The Dolch PAC 64 is a portable, rugged Pentium-powered PC from the mid 1990s. It was usually used (and can usually be found on eBay) as a "portable network sniffer" complete with multiple network cards supporting multiple media types.
ThinkPads have sort of a cult following among OpenBSD developers and users because the hardware is basic and well supported, and the keyboards are great to type on. While no stranger to ThinkPads myself, most of my OpenBSD laptops in recent years have been from various vendors with brand new hardware components that OpenBSD does not yet support. As satisfying as it is to write new kernel drivers or extend existing ones to make that hardware work, it usually leaves me with a laptop that doesn't work very well for a period of months.
After exhausting efforts trying to debug the I2C touchpad interrupts on the Huawei MateBook X (and other 100-Series Intel chipset laptops), I decided to take a break and use something with better OpenBSD support out of the box: the fifth generation Lenovo ThinkPad X1 Carbon.
