10 Aug
2015
10 Aug
'15
5:07 p.m.
On 2015-08-10 16:59, Hans Vlems wrote:
Thanks Dave, never realized that a VAX 7000 upgrade
resulted in an Alpha 8400.
Like I commented to Dave, this isn't really the truth of it. But anyway...
Both quite expensive boxes at the time. The 7000 was
rated at a little over 60 VUPS, wasn't it.
Depends on which 7000 we're talking about. The -600, -700 or -800. The
-800 was more than twice the speed of the -600.
Johnny
Verzonden vanaf mijn BlackBerry 10-smartphone.
Origineel bericht
Van: Dave McGuire
Verzonden: maandag 10 augustus 2015 16:50
Aan: hecnet at Update.UU.SE
Beantwoorden: hecnet at Update.UU.SE
Onderwerp: Re: [HECnet] VMS question
On 08/10/2015 10:35 AM, Hans Vlems wrote:
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
What I can remember of. 6000 model 4000 was that
it had a fast XMI
bus that held cpu's, memory, fast controllers (ci and the kdm?) and
connected to the BI bus(ses) that held the slower controllers. The
7000 didn't have that? I know that the 7000 was "alpha ready", which
I think was a box swap.
There's really no commonality between the 6000 and the 7000; they are
very different machines in nearly every way.
The 7000's processor/memory interconnect is LSB ("LaserBus"). LSB
"nodes" are either processors, memory, or an LSB<->XMI bridge. The
latter connects via a ribbon cable to an XMI card cage in the bottom of
the 7000 chassis, for I/O controllers.
The Alpha "version" of that machine is the 8400. The processor/memory
interconnect is TLSB ("TurboLaserBus"), and an LSB-based VAX can be
in-cabinet upgraded to a TLSB-based Alpha system.
-Dave