The DECsystem 5800 can have from 1-4 processor
board sets. Each set consist of a KN58A/A (T2026),
an interface processor, and a KN58A/B (T2025),
the MIPS processor.

The KN58A/A (the interface processor) is basically
a reworked KA62B (IIRC) which provides access
to the XMI and is responsible for running diags.

The T2025/T2026 can be considered a two-card
CPU set ... you need both to form one logical CPU.


Quite you all ended up here when the title is all
about Turbochannel (which was the DECsystem 5900 wasn't it?)
I really don't know :-)

Antonio


> -----Original Message-----
> From:	Vance Dereksen [SMTP:vance@ikickass.org]
> Sent:	Monday, May 14, 2001 3:13 AM
> To:	Paul Thompson
> Cc:	Chris Tribo; port-vax@netbsd.org; port-pmax@netbsd.org
> Subject:	Re: Turbochannel Card Info
> 
> 
> In my system, I seem to have one of each.  I know what the T2025
> does... it has the R3000-40MHz processor on it.  I can't for the life of
> me seem to figure out what the T2026 does.
> 
> Peace...  Sridhar
> 
> On Sat, 12 May 2001, Paul Thompson wrote:
> 
> > 
> > > I know what hardware is in it.  I was wondering if anyone had any
> > > knowledge with XMI.  I know what *my* 5800 contains.  I also wanted to
> > > know if anyone knew the difference between the T2025 CPU card and the
> > > T2026 Hyperion upgrade module.
> > >
> > > Peace...  Sridhar
> > >
> > 
> > Here is the information I found on the T2025/T2026.  However, it does
> not
> > imply to me that it is an upgrade...
> > 
> >    T2025-00    R3000 CPU MODULE W/II DAL INT
> >    T2026-00    XMI TO 11 DAL INTFCE,BOARD A
> > 
> > -- 
> > 
> >