Re: [pci] PCI <-> 8255 PIO

[Mike Dini <mdini@dinigroup.com>]

At 12:49 PM 4/29/2003 -0600, you wrote:
> Hi all,
> Absolutely new here, so please bear with me ;-)
>
> I'm trying to built a board which has 2-4 8255 chips attached to the
> pci  bus. My idea is to get the Memec Spartan 2 board for it, and
> make a small add-on board with the 8255s (and other stuff). I thought
> about using the Opencores PCI Bridge for it.

This is a little silly.  An 8255 merely has I/O's -- you would be
better off just using the I/O's of the FPGA for this function.  Is
this a school project?


> So, the question are
> ...
>
> a.) What problems should I expect ?
>
> b.) how difficult would that be ? (boards & layouts are not a
> problem)
>
> c.) are there still enough resources in the spartan II left (with the pci
> bridge & control for the 8255s), to add a DMA engine to it 
> ?
>
> d.) Anybody out here did something like this ?
>
> e.) where else to look for any input/links ?
>
> cheers & thanks in advance
>
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