[SunRescue] Woah, a PCI Ultra 1

[James Lockwood]

On Wed, 8 Mar 2000, Gregory Leblanc wrote:

> That must be a pain...  I wonder if you could have told them you purchased
> XXX high end server, but your cards don't seem to work, and gotten a
> replacement board.  :)

This was back in the heyday of the Field Circus Engineer, where the idea
of a mere mortal toying with internal parts was scoffed at.  Some people
did manage it but it was a pain.

> As for the PCI bus, I'm assuming that the U5 and U10 both have just a couple
> of slots, on a single bus.  What's the first multi-bus PCI SPARC?  

The Ultra 5 and 10 have 2 independent PCI busses, as does the AXi.  The
AXi breaks them out into 3 slots on each bus, with the onboard
SCSI/ethernet/Ebus tied to one of the busses.  The Ultra 5 and 10 use one
bus for the PCI slots (3 or 4) and the other bus for all onboard I/O
(onboard PGX, EIDE and Ebus bridge). 

The first multi-bus PCI SPARC was also the first PCI SPARC, the
SparcEngine Ultra AX.  Next came the Ultra 30 and 450.  The 450 has 6 PCI
busses on 3 seperate UPA controllers with a fantastic amount of bandwidth
(2GB/sec+).

All PCI bus Sparcs have multiple busses with the possible exception of
some of the embedded system products.  Not all of them have seperate slots
on independent busses.

> And, while I'm at it, besides clock speed on the CPU, what are the
> differences between the U1/140E, the U1/170E, and the U1/200E?

Bus speed (running at half CPU clock speed) and the label on the front of
the case.

-James