Thread

Color Classic II FPU speeds?

· Hardware · 5 posts · May 22, 2015 View original thread ↗

#1 Fri, 22 May 2015 - 00:37

Hi folks....

I just bought a MC68882FN33A FPU for my Color Classic II logic board. I think the "33" at the end of the Motorola model number means that it runs at 33Mhz. (?)

After I bought it, I read this wiki:

http://en.wikipedia.org/wiki/Motorola_68881

And now I wonder if a version of the above FPU was available in 40Mhz or 50Mhz.. And if so, would it even run that fast anyway in my Color Classic II logic board?

jack

#2 Fri, 22 May 2015 - 00:54

It will only run at the clock speed the motherboard is set to.

33 MHz is all you can get.

#3 Fri, 22 May 2015 - 00:55

40 or 50 MHz chips will work but run at 33 MHz.

#4 Fri, 22 May 2015 - 00:59

33MHz, That is what the man said.

#5 Fri, 22 May 2015 - 01:08

Thanks everyone. I accidentally bought the correct chip!

jack