FPU 68882 40 Mhz and crystal 48 Mhz

[paulo_becas]

Just a quick question,

I have a FPU 68882 40 Mhz but i can't get my hands on a 40 mhz crystal.
Can i use a 48 Mhz crystal with a 40 mhz FPU?

[rampartsagain]

Ola Paulo is this what you are looking for'

http://www.ebay.com/itm/40MHz-Xtal-Q...item2eb8cba2eb

if it is tell me because i think i have one or two of these ,and i can give you when we do that trade we talked about.
by the way i have been studiyng some things for the amiga that you will be happy to know

[paulo_becas]

Hi José,

It's exactly that, i can't get any here in Portugal, if you have them i would be much thankful if you could hook me up with one.
I have to go to my parents place to bring you what i promised. I'll have it this week.

[rampartsagain]

damn i saw but i don´t have
all i have is 25.00 and 28.37mhz if you have problems on buying through ebay let me know

[SilentBob]

The 68882 in my Blizzard 1230-IV is rated for 40 MHz, but it runs fine at 50 MHz. So it should be good.

[paulo_becas]

I'm afraid to try a crystal above 40mhz, so you're saying that you're using a 50mhz crystal with a 40mhz FPU?

[roy bates]

there are two types of 68882 apart from mask. plcc package and pga,the one on blizzards are pga.

i wouldent overclock a plcc fpu.

[altcomputing]

Originally Posted by paulo_becas

I'm afraid to try a crystal above 40mhz, so you're saying that you're using a 50mhz crystal with a 40mhz FPU?

Don't worry, I used to overclock a 33MHz '882 to 50MHz on my old A3630 and it didn't even heat.

[paulo_becas]

Originally Posted by roy bates

there are two types of 68882 apart from mask. plcc package and pga,the one on blizzards are pga.

i wouldent overclock a plcc fpu.

Mine is a PGA FPU, i'll give it a try with a 50Mhz crystal and see what happens.
Do i have to do anything else?

[roy bates]

Originally Posted by paulo_becas

Mine is a PGA FPU, i'll give it a try with a 50Mhz crystal and see what happens.
Do i have to do anything else?

no, it will either work or it wont.

[SilentBob]

Originally Posted by paulo_becas

I'm afraid to try a crystal above 40mhz, so you're saying that you're using a 50mhz crystal with a 40mhz FPU?

Yeah. It's been rock solid since 1996. (That's when I bought the 1230-IV).