I am trying Hyper terminal application for WSL2. Hyper’s configuration can be changed via [Edit]-[Preferences…] and it is a JSON file. For Hyper to start a session from WSL’s home directory, I needed to update the two entries: shell: 'C:\\Windows\\System32\\wsl.exe', shellArgs: ['~'], With these configurations, I can open a new terminal from my home directory.

Haneda airport is one of the two major airports of Tokyo. The main transit to the airport is Keihin Kyuko Line (Keikyu) that departs from Shinagawa station in Tokyo. I thought the train line was built for the airport, but, it was not. In fact, it was built for transporting visitors to a shrine at the location where Haneda airport is. The Anamori Inari Jinja was established around 1815 or so.

I’ve got a X68000 ACE HD and have been restoring it. The original power supply was dead and I was reparing it. However, even I fix the original power supply, it is for Japanese 100VAC and I am not comfortable using it with American 120VAC. So, I have been working on making a 120VAC power supply unit using ATX power supply along with the PSU repair project. There are many people who have created PSUs for X68000 using ATX power supply.

summary My X68000 ACE HD’s power supply is not working. Recapping was not enough to fix it. Repalced a Zener diode, a transistor, and a voltage regulator to fix. My friend gave me an X68000 ACE HD telling me that it doesn’t power on. X68000 is a 30 year old computer and the capacitor leakage is a very common problem. The X68000 ACE HD seems to have the capacitor leakage in its power supply.

I often need to test batterys voltage before throwing them away. I am using a multimeter to test, but it is cumbersome. I thought it is not too difficult to make battery voltage measurement tool using a microcontroller, so I did it as a little electronics project. Microcontroller I used - M5stack Core I used M5stack Core. It is an ESP32-based microcontroller and it is handy that it comes with a LCD screen.

I wanted to learn about RISCV this holiday break. You can use QEMU to emulate a RISC-V machine environment and you can run Fedora Linux on it. However, it was not straightforward. There are several tutorials online, but things seem to have changed and most of these didn’t successfully boot Linux for me. It took several days, but I finally managed to boot it. Here’s how I did it. My goal My goal was to log on to a Linux environment and issue ls command.

The goal of the project is to drive an MC8250 ACIA chip and send out “Hello World!” message over a serial connection. I have a Serial I/O card of RC2014 project. Its circuit diagram looks like this: The part that surrounded by the red line is the part we’re interested in. MC68B50 is a faster version of the 6850 chip, and its behavior is practically identical to the original MC6850 in this project.

I have not been a fan of Android File Transfer. I remember there are a few sshd for Android. Someone mentioned about SSHelper. While it doesn’t seem to have source code on Github, it is a GPLed open source software by Paul Lutus. It provides ssh access to your android. pc$ ssh 192.168.10.227 -p 2222. Sshd is running on port 2222. User doesn’t matter. You can log in with password by default.

I tried to open a Mac app called Sweet Home 3D.app and it failed. I tried from the command line: $ cd "/Applications/Sweet Home 3D.app/Contents/MacOS" $ ./SweetHome3D dyld: lazy symbol binding failed: Symbol not found: _CGContextSetAllowsAcceleration Referenced from: /Library/Java/JavaVirtualMachines/1.6.0_65-b14-462.jdk/Contents/Libraries/libawt.jnilib Expected in: /System/Library/Frameworks/ApplicationServices.framework/Versions/A/ApplicationServices dyld: Symbol not found: _CGContextSetAllowsAcceleration Referenced from: /Library/Java/JavaVirtualMachines/1.6.0_65-b14-462.jdk/Contents/Libraries/libawt.jnilib Expected in: /System/Library/Frameworks/ApplicationServices.framework/Versions/A/ApplicationServices Abort trap: 6 Solution: Install Java for macOS 2017-001. I did this before, but I had to do it again.

I realized that I had to type Control-P twice when I connected to a docker container and was using a command line. I’ve created a docker config file under root home directory: // ~root/.docker/config.json - don't type this { "detachKeys": "ctrl-@" } I am not using control-@. This solved the problem.