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SVGAlib shim for SDL2

I recently stumbled upon some source code I wrote when I was 18! I was very much into graphical effects back then, and all of that code targeted SVGAlib, which isn t really a thing anymore. So I teamed up with ChatGPT to write a thin translation layer to SDL, and I believe I got all Continue reading SVGAlib shim for SDL2

2025年10月、iPhoneでメルカリ(アプリ版)にログインできない時の対処方法

事象:メルカリのアプリを開いたら突然ログアウトされて、アプリ内でログインしようとしてもログインができない。パスワードが違うとか、そういうのはない。 対処方法:サファリでメルカリのブラウザー版(jp.mercari.com)を開いて、ログインする。ログインできる場合、今度はアプリを開いて、ログインボタンを押す。〇〇でログインされています、のようなメッセージが表示されているはず。パスワードを入れなくてもボタンを押すだけでログインができるはず。 効果がなかった対処方法:メルカリのアプリを削除して再度インストールしたりもしたが、効果がなかったので関係がないと思います。上の対処方法だけで良いはず。 もしかしたらやや古いiPhoneでしか発生しないかもしれません。最新のiOSは17だけど、iPhone 8とかはiOS 16までです。 PS 筆者はiPhoneユーザではありません。

Commodore SR-37 calculator part 3

We honestly didn t really do much in part 1 beyond cleaning and getting the thing powered; fixed some keys and the source of the constant power consumption in part 2, and this is part 3, which is just a quickie really. The calculator works wonderfully, it s just annoying to have to use it with wall Continue reading Commodore SR-37 calculator part 3

Microscopic Radix auricularia japonica snails / モノアラガイの赤ちゃん

The single Radix auricularia japonica snail in my tank decided to reproduce, most likely all on its own. I believe it must have arrived on my Cabomba as an egg (bought about 6 weeks ago), but it s also possible it actually arrived as a micro-snail and mated with another micro-snail Now having actually seen how Continue reading Microscopic Radix auricularia japonica snails / モノアラガイの赤ちゃん

Commodore SR-37 calculator repair part 2

In my previous post from over 1 year ago, I noted that there was 1 W of power consumption even when my Commodore SR-37 calculator was switched off. In this post, we are going to investigate and tackle this problem, and fix a key that sort of worked when I got the calculator, but in Continue reading Commodore SR-37 calculator repair part 2

Tiny aquarium fish net 3D print

Introduction I recently bought a 3D printer, and also recently acquired a new, very popular hobby (for my standards at least): I have a tiny 10 cm × 10 cm × 10 cm fish tank on my desk! What to do with such a tiny fish tank? Well, it s not all disadvantages. Disadvantages: Advantages: I Continue reading Tiny aquarium fish net 3D print

Analyzing USB-PD negotiation with an oscilloscope (e.g. Rigol DS1202Z-E/Siglent SDS 1202X-E) using Audacity and PulseView

Update 2025/05/17: It turns out that connecting Rigol scopes to the network can be very useful sometimes. Apparently you can connect your Rigol directly to PulseView by doing Connect to device → Rigol DS (rigol-ds). Update 2025/05/21: I also have access to a Siglent SDS 1202X-E, and while (AFAIK) PulseView can t be connected to this Continue reading Analyzing USB-PD negotiation with an…

Easy repair: unmarked Apple II Plus clone

Back in the days of the Apple II, you could apparently run off to Akihabara and get the same computer with possibly better components for less money. Or just the parts you needed. I had a chance to look at such an Apple II Plus clone that wouldn t boot into BASIC. It beeped and displayed Continue reading Easy repair: unmarked Apple II Plus clone

Commodore PET floppy drive (3040) repair

I recently had a chance to look at a malfunctioning Commodore 3040 floppy drive. Smoke coming out of drive There is a real chance that yours too might emit magic smoke when you turn it on for the first time in decades. So before turning it on, be prepared to turn it off quickly, and Continue reading Commodore PET floppy drive (3040) repair

The US government, what a fscking shit show

n/t