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SubjectPPro stepping
Hello!

I have a Supermicro P6DOF (Orion chipset) based Pentium Pro system. I
know that steppings before 'B0' had a PCI performance problem. My
/proc/cpuinfo says:

processor : 0
cpu : 686
model : Pentium Pro
vendor_id : GenuineIntel
stepping : 7
[snip]

How does '7' relate to 'B0'??? The reason for my suspicions
is that "opaque moves" under AccelleratedX are really choppy
(even at 8bpp) and no faster than some 486s I've seen. I get the
same problem under NT 4.0. I have a Matrox Mystique -
a relatively fast board?

Is it possible that PCI burst mode or lack thereof is
responsible for this? The devices listed in /proc/pci say
"no bursts" eventhough both the Advansys SCSI controller and
the Matrox support it. Any ideas?

Y.

PCI devices found:
Bus 0, device 25, function 0:
Host bridge: Intel Orion P6 (rev 4).
Medium devsel. Master Capable. Latency=32.
Bus 0, device 20, function 0:
RAM memory: Intel Unknown device (rev 4).
Vendor id=8086. Device id=84c5.
Fast devsel. Fast back-to-back capable.
Bus 0, device 6, function 0:
Ethernet controller: Intel 82557 (rev 1).
Medium devsel. Fast back-to-back capable. IRQ 15. Master Capable.
Latency=32. Min Gnt=8.Max Lat=56.
Prefetchable 32 bit memory at 0xffbeb000.
I/O at 0xd780.
Non-prefetchable 32 bit memory at 0xff900000.
Bus 0, device 5, function 0:
SCSI storage controller: Advanced System Products ABP940 (rev 0).
Medium devsel. Fast back-to-back capable. IRQ 10. Master Capable.
No bursts. Min Gnt=4.Max Lat=4.
I/O at 0xd700.
Bus 0, device 3, function 0:
VGA compatible controller: Matrox Unknown device (rev 2).
Vendor id=102b. Device id=51a.
Medium devsel. Fast back-to-back capable. IRQ 11. Master Capable.
Latency=32.
Non-prefetchable 32 bit memory at 0xffbec000.
Prefetchable 32 bit memory at 0xff000000.
Non-prefetchable 32 bit memory at 0xfe000000.
Bus 0, device 2, function 0:
Non-VGA device: Intel 82378IB (rev 136).
Medium devsel. Master Capable. No bursts.



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