FPU - Question - Yes or No?

Probably you heard this question before:

- Should i get a FPU for a expansion card?

I got the Blizzard 1230 mk-IV @50, i has no FPU should i get one?

I read the "yes" and the "No" before:

- some guys say that FPU is only used in 3D or maths aplications.
- others say that FPU is used in a normal image software
- i even heard that is used for reading mp3...

Being a Floting Point Unit (F.P.U), i can see any other application rather then 3D software or other maths programs, something like Excel, or similars...

If it has a significant advantage, were can i buy one for the blizzard 1230 iV ?
didnt see any in ebay or amikit.

What about speed, my CPU in @50MHz, can i only use FPU of 50MHz?

They aren't expensive. You may as well buy and install one so it's always there if you need it. I would definitely have one, but then I plan on eventually having my 1200 at a "can play Doom nicely" standard so I probably NEED one.

If ever I had money to burn I would get a 1260 card which, being a full 68060 would have built-in FPU and MMU... but they do cost a small fortune!

I have found a few 68882's on eBay but they are the wrong version for your card, which doesn't really help. I can only find the PLCC packaged chips @25MHz, and I believe you would need PGA packaged @ 50MHz. I will keep looking and see what I can find.

EDIT:

http://cgi.ebay.co.uk/MC68882RC25A-M...3286.m63.l1177

This should fit your card. One thing I'm not sure of is what the clock speed is. I'm completely clueless as to whether the chip has a maximum clock speed, but the actual operating speed is decided by jumpers or a crystal on the card, or if they're built at the factory to work at one speed and it can't be changed... This is a question for the experts :)

About the Crystal Oscillator,
here is a close up of my CPU and Crystal:
http://www.lobodias.com/commodore_am..._030_mk_iv.htm
witch crystal is it? It says 50.000000M

www.vesalia.de
has a 68882 PGA FPU at 25MHz for 13.90 euros, will it work on my @050 CPU ?
http://www.vesalia.de/e_68882[4803].htm

is there a relation between cpu(MHz) and FPU(MHz) ?

The card only as one cristal witch is running at 50Mhz so both CPU and FPU must run at 50MHZ, so a fpu slower than 50MHz will be overclocked.... and no a 25mhz fpu will not make it alive...:thumbsdown2:

Quote:

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Originally Posted by JLPedro

The card only as one cristal witch is running at 50Mhz so both CPU and FPU must run at 50MHZ, so a fpu slower than 50MHz will be overclocked.... and no a 25mhz fpu will not make it alive...:thumbsdown2:

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Ok, but i don't know if i can get a fpu at 50mhz, didn't find any so far.

50MHz 68882 is hard to locate and hence high price (above 30 euros).
I recently completed my quest for 40Mhz version (need one for my GVP A530) which is also very pricey (Mr.JJB offers at AmigaCenter France offers it for 50 euros).

Quote:

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Originally Posted by Lockon

50MHz 68882 is hard to locate and hence high price (above 30 euros).
I recently completed my quest for 40Mhz version (need one for my GVP A530) which is also very pricey (Mr.JJB offers at AmigaCenter France offers it for 50 euros).

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:blink: 50 euros ?!?!? OMG

I was told that an FPU is useful as it will help IBrowse display graphics alot quicker.