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Log book

Everything that can’t go anywhere else.

  • More about compilers
    2 février 2023, par Mathieu Brèthes

    In my previous post I wrote about my documentation research on other compilers. I checked SmallC more closely and I think it won’t be adapted to my project for the following reasons : it has been closely designed for the Z80, and in particular it does not have a dynamic register allocator, which means it won’t make good code for the TLCS900H and its 20 registers it only compiles a subset of C, missing are structures, 2D arrays... it does not support long integers, and the standard int type (…)

  • More compilers
    29 janvier 2023, par Mathieu Brèthes

    In my previous article I checked SDCC as a possible candidate for extending C compiler to the TLCS900H, the NeoGeo Pocket CPU. This compiler already has a backend for the TLCS90, and on the Toshiba documentation it was writtent that both instruction sets look alike.
    However there are three problems : The two CPUS are really very different : the 900 is a 16bit processor with 32 bit registers, and it has a 24bit bus. The 90 is a 8-bit CPU. The instructions of both look alike but the code to (…)

  • A first dive into SDCC
    22 janvier 2023, par Mathieu Brèthes

    I think I’m going to work on SDCC as I feel I’d rather make tools than make games. Making tools for one’s own work is very satisfying. And also, who wouldn’t want to write his own compiler ?
    Just joking. What I’ll try to do is, to add a processor to an existing compiler. That’s complicated enough.
    So why SDCC ? it’s adapted for older processors and controllers one finds in old video game consoles it allows to generate binaries for a cousin of the TLCS-900, the TLCS-90.
    So I downloaded (…)

  • Introduction
    18 décembre 2022, par Mathieu Brèthes

    So, why this website ? Why creating a website in 2022 ? This will be a general introduction.

  • A menu for Nils
    3 décembre 2022, par Mathieu Brèthes

    Nils has always created physical devices to present Hanging Around, his RPGMaker-based videogame. Arcade stations, more specifically ; the first one being installed at Grenoble’s School of Art ; the second which is now at my place ; and now a third one for an exhibition (above).
    For the latter, Nils needed an interactive menu able to either launch the game, or launch some videos of projects he worked on. He designed an animated GIF to put in the background of the menu for the "old school" (…)