On 1/11/06, Dieter <[EMAIL PROTECTED]> wrote: > > > I don't see anything about support for sync-on-green? > > > > That's a possibility, although I hadn't planned for it. > > My feeble understanding is that it should be realitively trivial > to provide sync-on-green, which makes me wonder why ATI and their > 5 gazillion transistor GPUs don't.
We're controlling ALL the signals going to the DACs, so we can inject the syncs into green. We probably also have to have a pedestal. If we forget, don't hesitate to remind us to put it in while we're doing the development in the FPGA. > > My plan is to develop a PCI-X (32-bit) interface. > > Only 32 bit? Only. I've done a 64-bit controller, and it's a pain. We're not trying to rule the world with this product. We're trying to meet some basic needs. If you want to play high-end games, you're probably going to use the latest nVidia or ATI on a Windows PC. Sure, plenty of people play games under Linux, but they use the same nVidia and ATI cards with closed-source drivers. That market segment is filled. Our market segment is people who want to operate desktops, workstations, and servers-with-graphics and have it be fully open source and totally reliable. > > > The FAQ, feature list, spec, ... do not seem to mention > > > video decoding, e.g. mpeg2ts, h.264, etc. > > > > None of that. > > Correct me if I've miscalculated, but if you can't uncompress > video on the card, and with only a 32 bit PCI bus, there is > no way to display 1080i. > > 1920x1080 x 32bits/pixel x 30 frames/sec = 248,832,000 bytes/sec > 32 bit PCI = 133 MB/s Yeah, pretty much. This design has some limitations. Note that I fully intend that the PCI will run at 133MHz... if you have a PCI-X machine. > > > > Single-head: output selectable between DVI, VGA and TV-out > > > > > > It would be *very* useful if the available bandwidth could be > > > split between 2 (or more) devices. > > > > Could you be more specific about what you mean? Video bandwidth?=20 > > Drawing bandwidth? > > I read somewhere that a single link DVI is supposed to be able > to handle 1920x1200. If so, that covers nearly all displays. > Known exceptions being the Apple 30" and the new Dell 30". > > For many (most?) potential customers, the ability to handle > 2 displays (2 single link DVI displays or 1 DVI plus 1 VGA, or > 1 DVI plus TV, or ...) would be more useful than 1 dual link > DVI display. > OGD will have two dual-link-capable DVI connectors. Whether or not we choose to support that in OGA depends on experimental results and cost-benefit calculations that are yet to be done. _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
