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dec alpha 21264A processor revisions?
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Lupin_the_3rd
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PostPosted: Wed Jul 04, 2012 8:39 pm    Post subject: dec alpha 21264A processor revisions? Reply with quote

I've got two Compaq XP1000's here, both with Gentoo on them. A `sho dev` on each of them has two different things for the CPU. Both are 667 Mhz speed and both have 4 MB of cache.

XP1000 #1: 21264A-9

XP1000 #2: 21264A-8

I have the Compaq 21264A hardware reference manual even, and I cannot find anywhere what the -8 and -9 suffix means. I assume different revision levels of the CPU??

Any ideas?
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Compaq XP1000 Alpha EV67 667Mhz w/ 2GB ECC
32bit PCI: ATI Radeon 9100 (DRI works!)
32bit PCI: Generic Firewire 400 card
64bit PCI: BCM5703 Gig-E (Compaq NC7771)
64bit PCI: Sil3124 SATA w/ mdadm RAID1 (pair of WD VelociRaptors)
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mattst88
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PostPosted: Thu Jul 05, 2012 9:12 pm    Post subject: Reply with quote

Yeah, probably different hardware revision.
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Lupin_the_3rd
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PostPosted: Fri Jul 06, 2012 2:39 am    Post subject: Reply with quote

mattst88 wrote:
Yeah, probably different hardware revision.

Do you know of any document that explains the difference? Does the -9 fix some bug or errata of the -8 chip? Is the -9 "better" in some way? I'd love to know what is the difference between the two.

FWIW the system board of the -8 chip has some wires that have been soldered on between some components, like a factory fix for some defect. The -9 system board does not have these add-on wire traces. All of the identifying numbers and markings between the two boards are identical, the serial numbers are the only other unique thing.
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Compaq XP1000 Alpha EV67 667Mhz w/ 2GB ECC
32bit PCI: ATI Radeon 9100 (DRI works!)
32bit PCI: Generic Firewire 400 card
64bit PCI: BCM5703 Gig-E (Compaq NC7771)
64bit PCI: Sil3124 SATA w/ mdadm RAID1 (pair of WD VelociRaptors)
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mattst88
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Joined: 28 Oct 2004
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PostPosted: Fri Jul 06, 2012 2:10 pm    Post subject: Reply with quote

Lupin_the_3rd wrote:
mattst88 wrote:
Yeah, probably different hardware revision.

Do you know of any document that explains the difference? Does the -9 fix some bug or errata of the -8 chip? Is the -9 "better" in some way? I'd love to know what is the difference between the two.

FWIW the system board of the -8 chip has some wires that have been soldered on between some components, like a factory fix for some defect. The -9 system board does not have these add-on wire traces. All of the identifying numbers and markings between the two boards are identical, the serial numbers are the only other unique thing.


No, I don't. I'd be surprised if this information was publicly available.

My guess is that -9 is a newer revision and fixes something in the -8 revision, like the need for the soldered-on wires you found on the -8 CPU.
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