Farallon Net. Card for LC - PLCC socket?

[Solvalou]

Hi all, I have this coax network card installed in my LCII and was wondering what that PLCC style socket was? It looks like the same sort of ones that hold a 68882 PLCC FPU. Can anybody shed some light onto this?

P.s. Attached an image of a different Farallon card but fits the same models, it just has a RJ45 socket instead. Il get pictures of mine later if it will help?

 

[beachycove]

It is indeed for a math co-processor.

 

[Solvalou]

NEAT! So it acts as a sortof very plain accelerator.

Il have to look out for a 16Mhz FPU.

 

[LCGuy]

Most LC PDS ethernet cards have a PLCC socket for a 68882, since the LC/LCII didn't have a socket onboard (even though it had the solder pads)

 

[Solvalou]

Sorry to bring this back up but I managed to source an FPU and I got the PDS card out but don't know which way the 68882 goes in. There's an arrow pointing West on the socket so does the FPU plug in 90 degrees left form its normal position shown in the picture?

LINK TO PICTURE: http://i579.photobucket.com/albums/ss235/Solvalu/IMG_3767.jpg

 

[coius]

does the chip have a small dot/indentation on it? that would be Pin one. That needs to go into the area where pin 1 is.

check really close. Usually they put it on socketed chips.

 

[Solvalou]

There's a small indented dot above the 'M' logo thats right on the top middle of the chip. Is that something to do with it?

 

[zuiko21]

Probably it's already too late, but...

The arrow pointing west indicates where the pin 1 is -- put your FPU's indented dot towards west too.

Also, you can see the bottom left corner of the socket is sort of rounded/cut off... most PLCC chips have a similar indentation on the matching corner.

 

[beachycove]

Believe it or not, a standalone LCPDS 68882 "accelerators" was actually available, with nothing on the card but a 68882. I have one, I think marked as running at 16MHz.

I am not sure what model such a card was meant to fit, but presumably there was a 68030 logic board/ were 68030 logic boards without a 68882 slot?

 

[LCGuy]

They were specifically designed for the LC/LCII, which as I said didn't have a FPU socket. I think most people would have just gotten an ethernet card instead though, I haven't heard of many LCs having the dedicated FPU upgrade.