Maybe we could cooperate on this branch.
I will have FPGA modules with memory chips (possibly dual channel - 2x
12.8Gbit/s) made to let me focus on other parts of my designs. I know
there are some, but they do not meet my criteria.
Mine will be either mini-PCIe + GPIO header, or directly 2 GPIO headers
(B2B connectors). The GPIO should be capable of feeding one video head
(either with LVDS or direcly using 4 gigabit transceivers) while the
other side will be attached to the PC.
You can then design a base board with the desired IO plugs in the
bracket, as well as to have it in PCIe or PCI format. I really want to
move to PCIe segment, so I can not guarantee that there will be enough
pins for a full 32bPCI slot, however one can use a PEX8111 bridge in
reverse mode on the base board.
One can also include a pcie switch to make a multi-headed graphics. Once
the whole card will work (after revision 10 or so), the design can be
placed on a single card, or into an ASIC.
The modularity will save a significant amount of time and money - in the
current situation that everybody has different aims (in both io plugs
and feature range).
Daniel
On 12/08/2012 10:08 PM, Dieter BSD wrote:
Jack writes:
not all machines have PCIe slots. My newest one has AGP; the rest have
only PCI. How hard would it be to offer the same frame buffer and
analog back end on more than one base board?
They make adapters, but unless your current board has some unusual
feature you really need, you're probably better off getting a new
mainboard, and finding some other use for the current one. :-(
There might be a few OGD1 cards (PCI-X) still available.
At this point PCIe has been out for several years, so I assume that
the market for PCI or AGP video cards is very small. (Is anyone else
wanting PCI or AGP? If so now is the time to speak up.) The bus
interface is different, so it would be a significant change
to the electronics.
I have seen photos on the web of cards with one interface on
one side, and a different interface on the other. I suggested
that for OGD1 but there wasn't interest.
Given our limited resources, I'm trying very hard to come up with
a single board that can serve as many people's needs as possible,
without raising the cost (in engineering time, economic cost,
or risk that something will not work) too much.
Perhaps someone will to volunteer to design a 2nd board with PCI
or AGP, or to do the work looking into the possibility of
having two interfaces on one board.
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