> On Mon, 2 Feb 1998, Anders Magnusson wrote:
> 
> > Actually 8800 is two KA88 (2 * ~6 VUPs), and can have 512MB memory. It has
> > a PRO380 as console. One of the ftp.luth.se machines is a 8800.
> 
> Hm, is it a two-processor machine "by default", or _can_ it be one?
It _is_. The 8700 is uniprocessor by default but can be equipped with
another CPU.
> 
> > 8830 and 8840 are 3 and 4 CPU variants of 8800, with a MicroVAX as console.
> > A 8800 can have up to four BI buses.
> 
> Hm, was the 8800 the first VAX to have multiple processors without any
> tricking? And what were the 8974 and 8978 configurations _exactly (how
> many processors, HSCs, SAs)?
> 
8800 or 8200 was first with a 'clean' multicpu architecture. I don't know
anything about 8974/8978.  About max number of HSC'es... Let's see...
Theoretically: a 8800 can have 4 BI's, each of them 15 CI interfaces == 60,
each CI can have 15 HSC'es == 900 HSC'es. A HSC50 can have 24 disks and 24 
tapes -> 21000 disks and 21000 tapes. It would sure be interesting to see
a configuration like that...

> > TA78/81/90/91/92 uses a SDI cable and are connected to a HSC.
> 
> And if not to a HSC, what then? To an UDA/KDA/xxx?
> 
There is no 'not'. Only to HSC.

> > Both 6200 and 6300 have XMI bus. The CPU cards can be intermixed :-)
> 
> The 6200 had XMI? I did not know that... 
> 
They are the same, but 6200 has a slower CPU.

-- Ragge