Reading the documentation, it says the that the fpu doesn't need it's own oscillator because it will use the one for the cpu. So i'm thinking it should be a 68881-2 50mhz.
Reading the documentation, it says the that the fpu doesn't need it's own oscillator because it will use the one for the cpu. So i'm thinking it should be a 68881-2 50mhz.
and the 50mhz cpu needs a 100mhz oscillator.
Why does the documentation show 50mhz cpu and 48mhz oscillator ?Originally Posted by BloodyCactus
Maybe someone should ask Mr Braun to clarify this? Because he said on eab that the CPU needs a 100mhz oscillator. This is what illuwatar writes on his site. "FPU: Motorola MC68881 or MC68882 at CPU-speed".
GB said the rev4 board, CPU runs at 1/2 osc speed. dont know what the 48mhz is for.Why does the documentation show 50mhz cpu and 48mhz oscillator ?
http://eab.abime.net/showpost.php?p=...&postcount=208
k, I will pick up some 100mhz oscillators... i can get them for $3 each + shippingGB said the rev4 board, CPU runs at 1/2 osc speed. dont know what the 48mhz is for.Why does the documentation show 50mhz cpu and 48mhz oscillator ?
http://eab.abime.net/showpost.php?p=...&postcount=208
Hi
If the board rev4 halves the clock and we put an oscillator at 100 Mhz, the FPU at 33 Mhz is out of his operating range.
As CUF85 notes illuwatar writes on his site that the FPU: Motorola MC68881 or MC68882 run at CPU-speed.
If we run the CPU at 50 Mhz with an hypothetical XC68882RC33A FPU, i don't know if the FPU holds the speed (overclocked +50%).
the fpu will overclock to 50mhz but i cant remember what speed does overclock to 50mhz , maybe we need somebody who has done this on accelerators ,or we ned to buy 50mhz, but i do know the 68882 will overclock.
Hi kipper,
If possible I would like to buy the gal's and the fpu + socket, too.
Thank you.
I'd be interested in a FPU, Socket, oscillators and gal.. hoping that it all works at 50Mkz
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