🚀 go-pugleaf

In article <TOMW.92Sep2182900@orac.esd.sgi.com> tomw@esd.sgi.com writes:
>
>EISA is a real system bus.  Local Bus just adds 1-3 special slots that
>run at processor speed.  EISA will cost you $1000.  Local Bus will cost
>you $50-$100.  Local Bus is faster than EISA.
>
>Note that there are EISA Local Bus machines being sold.  Seems pretty
>stupid to me.  As far as I'm concerned, the main advantage of EISA is
>speed, so why not just get a regular ISA Local Bus machine?
>
>Local Bus gives you up to 3 32-bit slots that run at the processor
>speed.  Generally, they use EISA-style connectors, but they aren't EISA
>compatible.  If you want to use the 32-bit slots, you have to get
>special cards for it.  Orchid now sells a Fahrenheit local bus board.
>ATI is going to be selling new versions of their Windows accelerator
>cards that work in a local bus.

EISA is a 32-bit version of ISA.  the local bus is NOT an extension or
part of the ISA or EISA but is a completely different bus.  the ISA and
EISA are system buses that run at a fixed speed in all machines, where
the local bus runs at the speed of the processor (I may be wrong about
that, it could run at a fixed speed that is much higher).  the
possible problem with this is that a card that runs in your 50MHz
machine may not run in a future 100MHz machine because it can't
handle the faster speed.

you can have a local bus in either a ISA or EISA bus.  I'm sure that
if I interpreted what I read incorrectly that someone will correct
me.


gerald walls (walls@saifr00.cfsat.honeywell.com) or
             (int_walls@am.eccx.umc@esu36.cfsat.honeywell.com)

       Any opinions expressed are my own and not
         those of Honeywell or its management.