Re: Re: [pci] Newcomer to PCI

[Stefan Bergstr�m <stb@viking2001.se>]

A modern MoBo only drives the PCI signals to 3.3V but are 5V tolerant.
It is safe to use a 3.3V chip as long as you make sure you don�t insert
another board that will drive the signal levels to 5V. Just put your
oscilloscope to your PC and you will see.

Have Fun
STB

> -----Ursprungligt meddelande-----
> Fr�n: owner-pci@opencores.org [mailto:owner-pci@opencores.org] F�r
> jazimme2@yahoo.com
> Skickat: den 13 maj 2003 06:46
> Till: pci@opencores.org
> �mne: Re: [pci] Newcomer to PCI
> 
> It's keyed as a universal card, so it should work in any PCI slot at
32-
> bit, 33MHz.  You just need user constraints to tell the Xilinx
software
> whether it is 5V PCI I/O or 3.3V.  Note that there are now two
> (completely?) different versions of the development board out, so if
> someone on here gives you project files for the old one you'll
probably
> have some editing to do.  Incidentally, the Virtex/SpartanII is the
final
> Xilinx FPGA likely to support the 5V PCI systems...all the later chips
> including the SpartanIIE are requiring 3.3V I/O...which is only
present
> nowadays in expensive server motherboards with 64-bit 66MHz slots.
> This Memec card *does* work in those server systems as well though.
> 
> And Wishbone info is in the blue bar at the top of (all of) the
opencores
> web pages.  You'll want to make your design a wishbone target, to hook
> up to the wishbone master interface of the pci core.  (Unless, of
course,
> you want to do bus mastering with the card, but that's beyond the
> scope of what I have time to help with right now)
> 
> You can email me, but I'd rather keep it on the forum if that's
ok...your
> questions might help some other people, and others can help answer the
> questions as well.  I don't know *everything*...
> j.
> 
> ----- Original Message -----
> From: Sajid Farooq <sajid876@y... >
> To: pci@o...
> Date: Tue, 13 May 2003 02:16:30 +0100 (BST)
> Subject: Re: [pci] Newcomer to PCI
> 
> > Wow! Checked out that site and it was awsome. Thats exactly what
> > i've been looking for. 275$ is affordable. Thanks!
> >
> > I still probably need a PCI core though, no? The XILINX one is
> > prohibitvely expensive. For this PCI core, i need to make my design
> > Wishbone (sorry, not MBone...silly me) compatible, but will it then
> > work with any PCI slot after installing my own drivers? If yes,
> > then where can i get info on Wishbone?
> >
> > Jazimme, thanks for the reply. Helped a bunch. I hope you woudn't
> > mind if sent you a mail sometime and spared the poor people on this
> > list yet another newbie mail... :)
> >
> > Thanks
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