[rescue] SBus vs. PCI

[nick at snowman.net]

In a related question, what systems do have a 64bit PCI bus?
	Nick

On 23 Feb 2002, Gregory Leblanc wrote:

> On Fri, 2002-02-22 at 23:41, Dave McGuire wrote:
> > On February 22, Gregory Leblanc wrote:
> > > Technical reason?  I'll be damned if I've ever heard one.  Some people
> > > just don't like moving forward.  Hmm, let's see.  
> > > SBUS was Developed by Sun, is IEEE P1496, and goes up to 64-bit, 25MHz =
> > > 200MegaBytes/sec (standard is only 32-bit/25MHz)
> > > PCI was Developed by Intel, isn't a stanrard, and goes up to 64-bit,
> > > 66MHz = 528MegaBytes/sec. 
> > 
> >   The very first PCI Suns do 64-bit 66MHz PCI?
> 
> No, and I didn't claim that.  But I've got one of the newest sbus based
> suns, and it doesn't do 64-bit Sbus.  And PCI suns have been doing 64-66
> for what, 4 years now.
> 
> >   There are other issues here...Sbus can initiate a new transfer
> 
> Agreed, there are.  
> 
> > immediately following a completed one, whereas PCI takes several for
> > setup.  There are a few others but I don't recall the details offhand.
> 
> Cool.  There's one detail.  Now to find some more...
> 	Greg
> 
> -- 
> Portland, Oregon, USA.
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