what is the URL you used to find the strangedog site? thanks!!
On Feb 6, 2:23 am, "[email protected]" <[email protected]> wrote: > On Feb 4, 1:49 pm, Valter Prahlad <[email protected]> > wrote: > > > Il giorno 4-02-2012 10:54, pdimage ha scritto: > > > > Both the X800 and the X850 will convert to mac but I gather they are > > > very troublesome and the dvi port never works as far as I know. > > > As far as I can remember, the problem with a flashed PC X800 DVI port is it > > won't drive a DVI monitor, but it will still work with a VGA one (provided > > you use a DVI to VGA adapter on the port, of course). > > In other words, after flashing the card, the two display ports still work, > > but only for VGA monitors. > > > I'm not 100% sure, but that's what I understood after getting an used PC > > X800 for 25£. > > (I didn't flash it yet, though, because it's working in my gaming PC right > > now :-) > > I went and read the 29 page thread about X800/X850 conversion on > Strange Dogs. Themacelite forum may be gone, but Strange Dogs is > still around. Yay! > > According to the long thread, things are as the previous poster wrote. > > As with many of these conversions, there's a reduced Firmware to fit > in the PC 64K Flash. The full Mac Firmware requires a 128K flash > chip, which usually means replacing the 64K Flash chip on the PC > versions of the card. > > The X800 and X850 can be converted, but while the PC models have one > DVI port and one VGA port, the DVI port will only work with a DVI to > VGA adapter. > > The reason is that the GPU has the circuitry for the DVI (or ADC) > output built in. On an Apple card with ADC/DVI outputs, the card uses > the built-in circuitry to drive the ADC port and there is a separate > Silicon Images DVI chip on the card to drive the DVI port. > > So, Apple card: ADC port driven by GPU. DVI port driven by dedicated > chip. > > PC card: DVI port driven by GPU. VGA port doesn't need extra > circuitry. > > And when you replace the PC X800/X850 BIOS with Mac Firmware, it tries > to program the GPU to output ADC format to the DVI port -- which > doesn't work. And there's no dedicated chip to drive DVI on the > other port, and there's just a VGA connector there anyway. > > Now, ADC is electrically compatible with DVI. The converters between > the two just rearrange the wires. They don't massage the signals -- > except that DVI to ADC requires the addition of the 28V supply. > > So this suggests that the DVI port on a converted X800/X850 probably > has the proper signals, but on the wrong pins. > > The HP Fire GL X3 has two DVI ports and has the dedicated DVI chip on > board. Apparently, conversion of the Fire GL X3 does yield two > working DVI ports. It may require the full Mac firmware (Flash chip > replacement) to get that functionality. I can't remember any more. > > The Fire card is rated for a slower clock speed than the X850XT PE but > gets good benchmarks, nevertheless. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/g3-5-list
