Assembly dx7

Open-source Assembly projects categorized as dx7
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Topics: Synthesizer fm-synthesis hd6303 fmsynth fmsynthesis
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Assembly dx7 Projects

  • yamaha_dx7_rom_disassembly

    Yamaha DX7 Firmware ROM annotated disassembly.

    • Project mention: Reverse-engineering the Yamaha DX7 synthesizer's sound chip from die photos | news.ycombinator.com | 2024-01-12

    I wrote the article mentioned by Ken: https://ajxs.me/blog/Yamaha_DX7_Technical_Analysis.html

    I've unwittingly become a bit of a Yamaha FM Synth historian!

    Here are some other contributions to reverse-engineering the DX7:

    A fully documented disassembly of the DX7 ROM: https://github.com/ajxs/yamaha_dx7_rom_disassembly

    A new firmware ROM that makes the DX9 function like a DX7:

  • yamaha_dx97

    Alternative firmware ROM for the Yamaha DX9 that restores the functionality of the DX7

    • Project mention: Unit testing on an 8-bit CPU | news.ycombinator.com | 2023-11-28

    I've been writing a lot of 8-bit assembler for the 6303, which is in the same processor family as the CPU in the TRS-80, which the author is writing code for (for this project in case anyone is wondering: https://github.com/ajxs/yamaha_dx97). I ran into the exact same issue. I wrote a MAME driver for the target platform, so I could test my builds on my development machine. Obviously that sped things up a lot. The MAME debugger isn't really a tool for unit testing, and can't really be easily instrumented, but I was able to write a lot of scripts for the debugger which would set up the breakpoints and system memory for an individual 'test'. Not quite unit testing, but as close as I could get cheaply.

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NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).

Assembly dx7 related posts

Index

Project Stars
1 yamaha_dx7_rom_disassembly 60
2 yamaha_dx97 17

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