Marpet Deveopments M1207

[nicholas]

I have one of these with 4MB RAM and I also have an MC68882FN25A.

The card works perfectly without the 68882, but when I fit the PLCC my A1200 just stays on a grey screen when I switch it on.

Any ideas chaps?

[nicholas]

I know this might sound obvious but are you sure both the crystal and the FPU are in the right way round...

Chip is, but dozy me didn't think to buy a crystal! lol

Any particular one I need?

[nicholas]

Thanks Franko, much appreciated.

I'll buy that crystal later.

Jumper is currently set to INT.  Which way round is the correct way for the PLCC chip to be fitted?

[nicholas]

In the close up picture above, the FPU should be keyed to the bottom left corner of the socket (where the round hole is just above the word CPU) but it should only be able to fit in one way, hope you haven't forced it in the wrong way...

PS:any luck with the RetroBright yet...

I've got it fitted that way but still stuck on a grey screen.

RE: Retrobright, on my third attempt at i left it under a proper UV bulb for 10 hours without checking on it.  Went back at the 10th hour to find out the fuse had blown in the plug!

4th attempt tonight!