This is the RSS feed from Leonard's Blog https://arnaud-carre.github.io/ How to emulate an Atari YM2149 audio chip on Amiga at litteraly 0 CPU cost, by Arnaud Carré - Audience This post is for anyone who loves the technical and historical aspects of chiptune music, as well as enthusiasts of the Amiga PAULA and Atari YM2149 audio chips. The Context In my Cycle-Op demo, I showcased a classic sin-dots effect that rendered 6405 dots at 50 FPS on the... Fri, 15 May 2026 00:00:00 -0400 https://arnaud-carre.github.io/2026-05-15-ym-fast-emu/ https://arnaud-carre.github.io/2026-05-15-ym-fast-emu/ How a modern AVX instruction shares a similar design with a 1985 blitter chip, by Arnaud Carré - Audience This post is for any enthusiastic SIMD CPU programmer curious about weird AVX instructions. But also for any veteran Amiga programmer who never quite figured out how to calculate that cursed “minterm” blitter value! AVX-512 Bitwise ternary logic instruction The idea for this post came while watching a great... Sun, 06 Oct 2024 00:00:00 -0400 https://arnaud-carre.github.io/2024-10-06-vpternlogd/ https://arnaud-carre.github.io/2024-10-06-vpternlogd/ Technical details about a recent 4096bytes Atari-STE intro, by Arnaud Carré - Recently I released a 4096 bytes Atari intro, featuring some bandwidth impossible sprites drawing in fullscreen. I hope technical inner details could please any graphics enthusiasts, and not only boomers :) Audience This post is made for anyone interested in oldskool graphics, but also for all retro computers technical details... Sun, 08 Sep 2024 00:00:00 -0400 https://arnaud-carre.github.io/2024-09-08-4ktribute/ https://arnaud-carre.github.io/2024-09-08-4ktribute/ You don't have to be a graphics programmer to need a GPU, by Arnaud Carré - Most people think that a GPU is only made to render millions of triangles. But GPU power isn’t reserved to a few graphic folks and any general programmer can use it. Today we’re gonna outperform our oldskool image converter tool using a GPU! Isn’t that cool? Audience This post is... Sun, 10 Dec 2023 00:00:00 -0500 https://arnaud-carre.github.io/2023-12-10-gpgpu/ https://arnaud-carre.github.io/2023-12-10-gpgpu/ Using modern brute force approach to improve image quality on retro computers, by Arnaud Carré - I want to share some of my recent findings when having fun with a very old and not really known graphics mode from the 80s called “HAM”. Everything started when I wanted to add HAM support in the bitmap converter tool I made to create my oldskool demos. The challenge... Fri, 30 Dec 2022 00:00:00 -0500 https://arnaud-carre.github.io/2022-12-30-amiga-ham/ https://arnaud-carre.github.io/2022-12-30-amiga-ham/