> BTW does anyone know how you can make your Audio (SCC, ...) work ok at
> 7MHz?
I think the answer NYYRIKKI gave is not correct.
Just supply it with its own 3.58MHz clock signal. Build your own
oscillator circuit in the cartridge (Parts are worth a couple
guilders I think) and connect it to where the cartridge slot CLOCK
signal would have gone. This clock signal need not be synchronized to
the MSX bus; in sound cartridges it's only used as base frequency for
the wave generator devices inside the FM circuits. (This is why the
total output frequency shifts up one octave if running @7MHz) Only
thing that may go wrong is replayer software that uses too strict i/o
timing routines; maybe they need some extra wait-timing (eg NOP).
At least this is how I think it works, correct me if I'm wrong.
Tristan
+ Omega + join #msx on undernet + [EMAIL PROTECTED] +
| | FUNET MSX maintainer | ftp://ftp.funet.fi/pub/msx |
+ irc: OmegaMSX + Techno composer + http://users.bart.nl/~omegamsx +
****
MSX Mailinglist. To unsubscribe, send an email to [EMAIL PROTECTED] and put
in the body (not subject) "unsubscribe msx [EMAIL PROTECTED]" (without the
quotes :-) Problems? contact [EMAIL PROTECTED] (www.stack.nl/~wiebe/mailinglist/)
****
