It really boils down to which chip acts as the logic glue for the PCI bus. The -150 uses the well-documented cx25840 as the PCI bus arbitrator, with the cx23416 tacked on the general-purpose I/O pins. The blackbird uses them in the other order... the 23416 is the PCI interface and the capture chip is glued on as a general-purpose I/O to it.
I think that's more or less correct...
Okay :) I have 2 PVR150s, so I should know this. You probably don't really care, but...
The cx23416 provides the PCI interface on the -150. In this way, it's the same as the PVR-250. The cx25840 is a "Audio / Video format decoder". This does the A->D, VBI, sync and scaling magic.
On the blackbird 250 design, it goes PCI -> CX88xxx -> cx23416 as you say, on the GPIO pins. The CX88xxx is also used as the A->D, etc.
I'd still like to see a resolution comparison. My -250's crap out at about 400 lines, so capturing over about 540x480 is pointless.I'm afraid I can't easily do that, since it would mean pulling the card from the Myth box, and the boss would get annoyed. :)
Cheers,
Allan. _______________________________________________ mythtv-users mailing list [email protected] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
