68000 DCCs tuning
 

Hi all, I have to ask: does it need only quartz replacement and will the chess clocks work correctly? - because in H8 and 65c02 devices they arent this way... Want to speed-up FD2265 and Scorpio to 20Mhz.
Thanks in advance!

AW: 68000 DCCs tuning
 

Hallo,
Mit dem Motorola 68xxx reihe gibt es keine externen Quartz. Also die genauen Chipset bestimmt unter anderem die Quartz.

http://en.wikipedia.org/wiki/Motorola_68000_family

Mind the Last digits on the CPUs indicating the ClockSpeed.

http://www.cpu-world.com/CPUs/68000/index.html


Stefan

Re: 68000 DCCs tuning
 

Hello, if its so, why here's written "Tuning: stabil mit 19,66 MHz (Resonator-Tausch), darüber - bis 24 MHz - schnellere Eproms erforderlich" ? I never saw 68000 cpu at 20Mhz itself, only 8/10/12/16 Mhz models...

Novag Scorpio 68000

AW: 68000 DCCs tuning
 

Yes, the clocks work correctly. Novag has two timer.

https://www.schachcomputer.info/Bild..._Resonator.jpg

Re: 68000 DCCs tuning
 

Aha, so FD2265 seems to have only 1 quartz for it, am I right?

AW: 68000 DCCs tuning
 

Yes, right.

Re: 68000 DCCs tuning
 

Thank You very much! Maybe You can also tell your opinion about memory expanding? I see that both slots for ordinary RAM are the same type as for hash-RAM (DIP-28), so is there any reason to replace 2x8kb planks by 2x32kb... Im asking because I tried this trick with TurboKing but it didnt turn-ON, and I had to put back an old 8kb plank... Probably, motherboard system logic of TK doesnt support 32kb RAM, but with FD2265/Scorpio it looks like it could because device works with hash's 2x32kb...