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SubjectRe: YM2612 Envelope Generator Reply to this message
Posted by_Stef_
Posted on07/10/06 06:14 AM



Hi,

I searched for a good technical document for age, i finally used the MAME core constantes to write my own core. Another way is to do hours and hours of tests with a genesis flash card ;)

- Stef

> Hi,
>
> I'm trying to convert the envelope generator's attack/decay rates, the 6-bit
> values, into actual time. The only documentation of the YM2612 that I know of
> (http://www.smspower.org/maxim/docs/ym2612/index.html) doesn't talk about this
> at all. Some manuals for related chips (OPL3, OPM) give tables, but they are
> different from one another and the different clocks probably mean that the
> tables don't apply.
>
> Does anyone know exactly what the chip does with these rate values, and where
> the emulator writers know that from?
> Also, if someone knows where I can get the YM2612 manual, I would appreciate it
> (although the exact wait mechanism isn't likely to be described since it isn't
> in other Yamaha FM chips' manuals).
>
> Thanks,
> Benjamin
>


-
Entire Thread
Subject  Posted byPosted On
*YM2612 Envelope Generator  bcs05/16/06 08:31 PM
..Re: YM2612 Envelope Generator  _Stef_07/10/06 06:14 AM
.*Re: YM2612 Envelope Generator  smf05/31/06 03:50 PM
..*Re: YM2612 Envelope Generator  bcs06/02/06 08:38 PM