WANTED MegaST 68881 copro board C103067 / SPF004

SophieRose · Post by **SophieRose** » 06 Feb 2021 02:47

I'm on the hunt for a MegaST 68881 FPU board C103067 / SPF004

Anyone got one they would be willing to part with?

Soph

DoG · Post by **DoG** » 06 Feb 2021 10:46

Sorry for asking, but what are you going to use it for? I'm curious since hardly anything uses a FPU on Atari.

(I own one of these board and it takes up so much space in the case)

SophieRose · Post by **SophieRose** » 06 Feb 2021 12:37

I like to mess with POV-ray and I'm interested in programming to utilise the 68881 in my own just for fun projects.

PS yeah they are a bit big aren't they.

frank.lukas · Post by **frank.lukas** » 06 Feb 2021 18:01

div SPF004 -> http://atari4ever.free.fr/hardware/zip/fpu68881.zip

CIRCUIT_FPU.gif

SophieRose · Post by **SophieRose** » 06 Feb 2021 18:11

Yeah cheers.

I've got all those files, that's my plan B in case I can't find an original. :)

frank.lukas · Post by **frank.lukas** » 07 Feb 2021 13:27

I´am snowbound totally in. So it made a quick and dirty Eagle schematics. It take a week or more to made the PCB Layout. Run the Autorouter can be done for a quick result. It will work but it not be nice. 10 pcb´s costs 5,- Dollar over pcbway in china plus postage ...

autorouter.jpg

SophieRose · Post by **SophieRose** » 07 Feb 2021 14:16

That's fantastic, thank you for sharing that 8-)

frank.lukas · Post by **frank.lukas** » 07 Feb 2021 14:37

See if all is correct. I can make misstakes ...

SophieRose · Post by **SophieRose** » 07 Feb 2021 14:52

I will check it through, thank you.

guus.assmann · Post by **guus.assmann** » 07 Feb 2021 15:10

Hello,

I do have a complete card, with a 68881.
It is an original, with one "flaw".
The Oscillator has been removed and put in a socket.
This has been done to test the Co-Pro at higher speeds, and it does.

I'm willing to sell it for a good price. (definitely not top dollar)
Downside is, that I'm in the Netherlands and shipment may be a spoilsport.

Let me know if you're interested.

BR/
Guus

exxos's Atari, Amiga & retro forum