Re: AGP or PCI


Carlos CZ wrote:
Hi all again,

Finally I finded the root of my contradictions,
what happened is that my book only show two posibilities:

* or you use a PCI bus controller,
* or an AGP bus controller that replaces completelly the
PCI controller, yes, there is no PCI here.

If this is in an actual textbook, someone needs to have a chat with the
author.

Most machines have an AGP slot, but there's no requirement for one. Or
at least one PCI slot, which is also not a requirement, or the newest
ones have PCIe, and your old 286s and 386s will have an ISA video card.
Yet another option is having the video integrated into the motherboard.
And old macs used nubus, so this discription given is woefully
incomplete.



actually, I believe my motherboard uses a scheme like the one showed
in picture 7.7 of the Mike's link, wich is clearly a different approach, and
seems to isolate the AGP mechanism to the video system, leaving the rest
connections to PCI ( I wonder why to keep PCI, but this is secondary item ),

Because PCI is useful for other kinds of cards, audio, ethernet, modem
and so on.

but well, I need some time to understand and verify things related.

thanks and have a nice day, Carlos.

.

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