On May 12, 2013, at 11:38 PM, Gregg Eshelman wrote: > --- On Sun, 5/12/13, Derek Morton <[email protected]> wrote: > >> My memory is >> that the video card riser is little more than a right angle >> adapter with few or no components on it while the DOS card >> has a plethora of electronics on it which convert the PPC601 >> PDS to a '040 PDS slot. So if my memory is right, the >> PDS video card from a x100 system cannot work in a Quadra >> system without a custom adapter of some sort. But you >> never know... > > When G3 upgrades for the x100 Powermacs were a big thing, Sonnet explained > that it wasn't possible to support the DOS card on their 6100 G3 card due to > the custom chips Apple used to interface the Quadra PDS bus of the DOS card > to the 601 PPC PDS bus. > > Having the passthrough for the 601 PDS video cards was easy to implement. > > So in theory one should be able to separate a 6100's DOS card from its > adapter and plug it into a Quadra with a matching PDS connector.
True enough... It would seem Robert was able to install the DOS card in his Centris and everything worked. I was lamenting over the inability to use the PPC x100 4MB PDS video card in a Quadra PDS slot. Whenever I am working with my Quadras I grumble over the lack of PDS expansion cards. I am perpetually tempted to make one (I even went out an purchased a large number of the PDS card connectors from a parts broker) but I never seem to have the time to get around to more than doodling up a circuit or two. Life always seems to take precedence... And how much longer before the Quadras start to die? I think the better project would be to reverse engineer the PALs/GALs used for glue logic... Programmable devices scare the heck out of me! -- -- ----- You received this message because you are a member of the Vintage Macs group. The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To leave this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/vintage-macs Support for older Macs: http://lowendmac.com/services/ --- You received this message because you are subscribed to the Google Groups "Vintage Macs" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
