Re: sbp2 address space

["Randy.Dunlap" <rdunlap@xenotime.net>]

On Mon, 09 Jan 2006 22:41:45 +0100 Stefan Richter wrote:

> I wrote:
> > Does PCIe provide a bigger host bus address space than PCI?
> 
> PCIe obviously supports 64bit addressing. Do newer revisions of 
> conventional PCI support more than 32bit addressing? What about PCI-X? TIA.

PCI-X allows 32-bit or 64-bit transfers.
IIRC, PCI conventional supports 64-bit by "DAC" == dual-address cycle,
basically 2 32-bit transfers.

> [sbp2 depends on a <= 32bit address space of the host bus. Single-chip 
> FireWire PCIe adapters are available now but I believe they are merely 
> based on a PCI FireWire link layer controller plus PCI-PCIe bridge.]

The PCI specs cost money, else we could just download and read them.  :(

Google found some hits, mostly marketing-speak, and this
1394b PCI-64bit host controller:
  http://tekgems.com/Products/MJ-FW-PCI-13.htm

---
~Randy
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