>>Not necessarily true. If I make the PSG generate a monotonic sound
>>(e.g by doing a couple of 'SOUND x,y' instructions in BASIC) and then
switch
>>between 3.57 and 7.14MHz (so no information flowing between PSG and z80 at
>>that time!) the sound gets distorted too. Same holds for other music
extensions
>>(SCC, MSX-Music, MSX-Audio)...
>
> This is just a speed up. (-: It doesn't generate garbage, and once you
>switch back to 3.57, everythig is ok again.
Well I certainly think it sounds like garbage. Especially when it switches
back to 3.5MHz all the time. The thing I was talking about by the way is why
they didn't output a 3.5MHz clock to the devices, it wouldn't be hard and
cause insynchronization (???) since the clock speed is exactly the double.
> When talking about FM this is not true. It generates real trash and
sometimes
>you need to turn off and on again so it can stop to generate that strange
sounds.
True.
> I'm not concerned about speed up on sound. Just about real problems,
like the
> genereated by 7Mhz on FM. But I think Ademir has created a solution
already.
> I'm just waiting.
The real solution is letting the engine control the timing, just like the
turboR does. If you output a byte to a port, and then output another byte
too fast after the first, the engine holds that byte and sends a wait signal
to the processor until the preset wait-time expired.
And indeed, it is annoying. I upgraded my MSX from 7MHz to "Advanced" 7MHz,
and ever since the computer crashes when a song is played on the (Toshiba)
Music Module at 7MHz. Before it only generated some 'misplaced' notes. But I
think this is worse.
But, I never liked the Music Module anywas.
~Grauw
--
>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<
email me: [EMAIL PROTECTED] or ICQ: 10196372
visit my homepage at http://grauw.blehq.org/
>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<
****
Problems? contact [EMAIL PROTECTED] See also http://www.faq.msxnet.org/
****
