Blizzard 1220/4 68882 Problems

The Khemist

Member
Joined
Sep 20, 2010
Posts
45
Country
UK
Region
Midlands
Hi

Just fitted 68882 40Mhz - MC68882FN40A to my 1220/4 as I do not have a crystal I set the jumper to 28Mzh. Just get black screen?(n) So tried 14Mzh still the same!(n)

If I remove the 68882 all back to normal :)

Are these 1220/4 fussy would it be best to get crystal?:roll:

TIA

The Khemist
 
Non working FPU or misplaced jumper. Check both.
 
Non working FPU or misplaced jumper. Check both.

4 options for board. 1. Turn off 1220. 2. FPU 14mhz 3. FPU 28mhz 4. Use installed crystal.

2 & 3 use internal clock.

Tried 2 & 3 just black screen. As I do not have crystal cannot check. going to order 40mhz 8-dil from farnell.

Cannot check fpu as I do not have another board to test in!

Has anyone else installed fpu to 1220 and got it to work with internal clock?
 
The FPU will work (if OK) or not (dead chip/absent).

You can check if the chip is not misplaced on the socket or if the socket have a bad contact. Try to clean it with some IPA and a toothbrush and try again.

If no bananas, the chip is dead or the socket is broken.
 
The FPU will work (if OK) or not (dead chip/absent).

You can check if the chip is not misplaced on the socket or if the socket have a bad contact. Try to clean it with some IPA and a toothbrush and try again.

If no bananas, the chip is dead or the socket is broken.

Ordered some IPA. Will clean everything up at test then ;)
 
IPA & 40mhz Crystal arrived today, Clean the socket pins nice a shiny now. :D

Still no joy, with or with out the crystal (n):eek::mad::help:

Could it be a timeing problem? The board is REV 2B.

Anyone in the Wolverhampton area who can test my FPU 68882 PPLC? or anyone else able to will cover cost of post?

I do love my miggy's but they are be so fustrating at times =) :nuts:

Also at least I have 250ml of IPA for cleaning suff :p
 
Last edited:
I think you must install crystal at 40Mhz for FPU 40Mhz (if it's like my AlfaRam 1200).
 
I did fit the crystal :dry: Still blank. Had play again last night few times got weird gfx output!

Can anyone test this FPU please ? :help: 68882 PPCL 40mzh.

I think you must install crystal at 40Mhz for FPU 40Mhz (if it's like my AlfaRam 1200).
 
Please send me a picture with your card+FPU+crystal.
 
My girlfriend has my good camera at the moment, she is away.

Been trying to take pics with my phone but they some out rubbish. Will lend a camera off a freind then send them to you.

Thanks

Please send me a picture with your card+FPU+crystal.
 
I don't know if this has been solved yet but I just experimented with my Blizzard 1220 + 68882@40MHz...

The computer boots fine with all three options..

40MHz OSC = ok
28MHz INT = ok (no OSC in socket)
14MHz INT = ok (no OSC in socket)

So it looks like your FPU might be broken or something else on the card controlling the FPU.
 
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