Quote:
Originally Posted by Glen M
You are correct in that the CPU was a 40mhz model and I agree that it was probably pushed to far and that is most likely the cause of the failure. I'm getting a 50mhz gold top chip so I'm hoping that will solve the issue and be safe at the 54mhz speed.
I've decided if I get it up and running again at 108/54mhz I'll just leave it at that with some cooling and be grateful its working. I don't want to push out to 120/60mhz and risk damaging anything further.
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Glen,
It may still be worthwhile chatting to Stephen and asking if the IDE is in Sync or out of Sync. Guessing it is in Sync as there is only one timing X-Tal on the board but I'm not the guy designing the board.
I have heard of the 030 being pushed to 70Mhz & has been happy for years @ that speed, but would guess active cooling is employed.
Presuming the IDE takes it's timings from the X-Tal for the CPU (there's a divide by two counter on the card somewhere) it would be handy to know the speed limitations of the IDE Controller chip. It could be a cheap part & have a smaller tolerance than other chip brands.
Don't forget the Ram Speed too.
More Power, More Speed!
Charlie
PS - Be wary of MC68030's from China, or any I.T. component for that matter. - A lot of them are "Mickey Mouse" event's & by that I mean, "Fictitious".