Motorola 6800 EXORciser development system simulator

This page summarizes the projects mentioned and recommended in the original post on news.ycombinator.com
Arduino dx7 eprom-emulator fmsynth eprom

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  • exorsim

    Motorola M6800 (6800) Exorciser / SWTPC emulator

  • yamaha_dx97

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

    • Very cool! I've been doing a lot of work reverse-engineering the firmware from Yamaha's 1980s synthesisers[0], all of which feature Hitachi 6303-series processors. The 6303 is Hitachi's second-source implementation of the Motorola 6803 architecture. I'd love to know how these devices were developed. I'm guessing a development platform like this would have been used by Yamaha. If anyone has any more information regarding development targeting the Hitachi 6300 series chips in the 1970s/1980s, I'd love to know!

    [0] In case anyone is curious, my latest successful work is hacking the Yamaha DX9 to have the full DX7 feature set: https://github.com/ajxs/yamaha_dx97

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  • EPROM-EMU-NG

    EPROM Emulator Project with Arduino

    • I actually used one of these things[0] during development of the DX9/7 firmware mod. I like your Mirage tools by the way! I've actually got a very battered Ensoniq Mirage I picked up for free that's badly in need of some maintenance. If I can get that running I'd love to give your firmware a try!

    [0] https://mygeekyhobby.com/2020/07/05/eprom-emulator/

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