Friend brought the BASIC PS2 game creation tool to attention:
https://game.watch.impress.co.jp/docs/20010123/artdink.htm
https://www.nicovideo.jp/watch/sm7259278
Manga:
https://archive.org/details/basic-studio-ps2-documentation_202510/Get%20started%20with%20EZ%20BASIC%20-%20ENG/page/11/mode/2up
The translator:
https://forums.insertcredit.com/t/welcome-to-basic-studio-powerful-game-workshop-ps2/5395

This thread is for documenting tech like this.

The manga reminded me of this mobile GPU one: https://armkeil.blob.core.windows.net/developer/Files/pdf/graphics-and-multimedia/how-does-a-mobile-gpu-work.pdf