On 3/17/06, Jack Carroll <[EMAIL PROTECTED]> wrote: > On Thu, Mar 16, 2006 at 10:03:23PM -0700, James Richard Tyrer wrote: > > Timothy Miller wrote: > > > > The Philips 3xDAC has 10 bits per channel, and we are grounding the 2 > > LSBs rather than connecting them to the FPGA. > > This strikes me as strange. This is a lot of performance to give up > without a serious fight. If OGA could eventually support this level of > color resolution, it should, and OGD should be able to debug the logic for > it. Is there a critical shortage of pins?
Yes, there is a critical shortage of pins. It's not a trivially simple problem to choose pin banks and hook everything up, but I believe that any pins left are too far away and of the wrong signal types to do us any good. And this is even after Howard tried multiple permutations and even ended up putting the FPGA on a 45-degree angle just to minimize all the routing. If someone else can come up with an alternative configuration that meets all the requirements, we'll gladly kiss their feet, because by no means do we give things like this up without a fight. And don't just assume that any pins are up for grabs. Also, keep in mind that there are even more critical things that have to be debugged about this board. Has anyone checked all of the RAM data and address signals? The automatic software tells us we're okay, but it can't tell us if we used 126 twice and skipped a number, for instance. Tweaking the video to get a sub-percent improvement in gamma detail while not noticing a bug in the memory section would be disasterous. _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
