Hmmm, this all sounds very encouraging.
Maybe I should just lay a wire from the clockchip to the PSG and the
slotexpander pin???
By the way, I don't think external RAM uses the sync signal, does it?
Otherwise it wouldn't work on an MSX-turboR either, because that one has
3.58 MHz on the pin in the slot too.
Oh, and by the way, Patriek would like some more feedback on his emulator,
you know, like 'it's cool' etc... I mean, his emulator IS cool...
~Grauw
> This is possible, but depends on the following:
> In MSX machines I know, the standard 3.58 MHz. clock signal is used for 2
> purposes:
>
> -CPU clock,
> -and as base frequency for audio generating IC's.
>
> The CPU clock signal is often used to control the signal timings of
> DRAM memory in the machine. And here is the issue:
> If these funtions are seperate (read: in seperate IC's), then you can
simply
> 'feed' 3.58 MHz. to the audio parts, and the, possibly 7 MHz., CPU clock
to
> the Z80 and DRAM controlling IC('s?).
>
> But if this is all controlled by one central IC ('MSX-engine'), then you
can't
> seperate these funtions. If you would feed it the old 3.58 MHz. signal,
then
> the DRAM timing would have no relation anymore with the CPU clock.
> -> DRAM wouldn't work -> well, you get the idea...
> This setup (one big IC) is used in MANY machines.
>
> Exceptions are possible here as well:
>
> You could add your own logic for generating the DRAM control signals, or
> you could use SRAM instead....
>
> In short: it all depends on your particular machine, and what you're
willing
> to change.
>
>
> Greetings,
>
> Alwin Henseler ([EMAIL PROTECTED])
>
> http://huizen.dds.nl/~alwinh/msx MSX Tech Doc page
> (not updated in a looonnng time, but several goodies are still there
;-))
>
>
>
>
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