Welcome to ISSOtm’s warehouse!

This is where I put things that can’t quite be categorized, such as “thoughts” or “status” posts.

Expect only technical / nerdy posts, though. ;)

This is a tutorial aiming at teaching Game Boy programming in assembly, even to beginners.

You can check it out here, or peek at the source there.

Smooth-Player is a system that allows stereo 4-bit sample playback at variable rates up to ~16 kiHz on Game Boy, Game Boy Color, and Game Boy Advance consoles.

Quartet is a great homebrew Game Boy game, published by Mackerel Interactive in early 2021. So why not do like the good old days and crack it?

In this post(-mortem?), I’ll explain what went into creating this cracktro. I’ll keep the most technical details out of the way until the end of this post, so it should still be a good read, even if you don’t have a technical background.

Is it a CTF? Is it a ROM hack? No, it’s both! It’s Fools2019!

The yearly event returns, this time with a vengeance. A remake of the 2018 edition, fully online again, and it’s Generation III this time? Buckle up, baby!

Pokémon games are… not very well programmed. This leads to them being very broken, especially the first generation.

Here is a list of things I’ve written about making the first generation of Pokémon games make things they weren’t supposed to:

This online tool allows converting Nintendo DS Action Replay cheat codes as you find them on the Web, to and from a pseudo-code format! This should help you understand how a given code works, and perhaps tweak it yourself?

The code was written using a code creation user manual found on Datel’s website, though I have since then lost this document.

This is written entirely in vanilla JS, and although the parser is a little strict, it’s quite usable.