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View topic - Sega of Japan Sound Documents and SMPS Source Code

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  • Joined: 24 Sep 2007
  • Posts: 4
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Sega of Japan Sound Documents and SMPS Source Code
Post Posted: Tue Jun 16, 2020 2:25 am



Presenting, official Mega Drive/YM2612 sound development documents and SMPS (Z80 and 68000+Z80 variant) sound driver source code that was used by Sega of Japan! There are tons of interesting goodies to find, including documents and sample files that details many aspects of sound development (including a sound editor).

Sega of Japan Mega Drive Sound Documents - Black Folder
Sega of Japan Mega Drive Sound Documents - Green Folder
https://hiddenpalace.org/File:Sega_of_Japan_Mega_Drive_Sound_Documents_-_MD_Soun...
https://hiddenpalace.org/File:Sega_of_Japan_Mega_Drive_Sound_Documents_-_MD_Soun...


You can read more here

Huge thanks to Frank Cifaldi from The Video Game History Foundation for helping us preserve these almost 30 year old floppies!

Enjoy. :)
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  • Joined: 19 Oct 1999
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Post Posted: Tue Jun 16, 2020 6:28 am
Awesome - although I think it glosses over the origins in earlier Z80 sound drivers.
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  • Joined: 14 Aug 2000
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  • Location: Adelaide, Australia
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Sega of Japan Sound Documents and SMPS Source Code
Post Posted: Tue Jun 16, 2020 8:24 am
We used to use very similar looking ROM-RAM In-Circuit-Emulators with the same long ribbon cables at work in the early 2000's.

The things we so UNSTABLE. You would have to restart and reload the session every 1 to 2 hours. I'd imaging using one 9 to 5 every day would drive you crazy!
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Post Posted: Tue Jun 16, 2020 10:18 am
I guess at lower MHz rates the stability might be better, but still even better to avoid the long ribbon...
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