P1394 Mail Archive: RE: P1394> Rough SBP-2 & IP1394 core component ROM sizes

P1394 Mail Archive: RE: P1394> Rough SBP-2 & IP1394 core component ROM sizes

RE: P1394> Rough SBP-2 & IP1394 core component ROM sizes

Nagasaka Fumio (Nagasaka.Fumio@exc.epson.co.jp)
Fri, 13 Feb 1998 19:27:28 +0900

I agree with Stephen,
> Also, I don’t believe any of the chip manufacturers support SBP-2 for
both target and initiator.

Do we need to develop a firmware which supports two LINK ICs
one for initiator and one for target?
I think “yes”. Because typical LINK IC has only one input FIFO in
each chip. And it is very difficult to implement two different software
stack utilizing one i/o channel.
--------------------------------------------
-------------------------------
Fumio Nagasaka
Epson Software Development Laboratory Inc.
Tel +81 268 25 4111, Fax +81 268 25 4627
E-mail to nagasaka.fumio@exc.epson.co.jp

-----Original Message-----
From: Stephen Holmstead [SMTP:stephen@hpb16977.boi.hp.
com]
Sent: Thursday, February 12, 1998 1:30 AM
To: 'Turner, Randy'; 'Brian Batchelder';
p1394@pwg.org
Subject: RE: P1394> Rough SBP-2 & IP1394 core
component ROM sizes

My experiences in the past is that combining target AND
initiator
functions into a single device is VERY difficult. The
complexity of the
state tables and ambiguities that can arise make it very
difficult.
Also, I don't believe any of the chip manufacturers
support SBP-2 for
both target and initiator. In my opinion, it's NOT just
a matter of
adding the 15K for the target and 15K for the initiator.
The target and
initiator have vastly different functions. Designing a
model that did
both (well) would be a challenge. It was problems like
this that fueled
many of the AEN (asynchronous event notification)
debates.

Stephen

> -----Original Message-----
> From: Turner, Randy [SMTP:rturner@sharplabs.com]
> Sent: Monday, February 09, 1998 1:03 PM
> To: 'Brian Batchelder'; p1394@pwg.org
> Subject: RE: P1394> Rough SBP-2 & IP1394 core
component ROM sizes
>
>
> I am very interested in the combined target/initiator
footprint as
> well.
>
> Thx
>
> Randy
>
>
> -----Original Message-----
> From: Brian Batchelder
[SMTP:brianb@vcd.hp.com]
> Sent: Monday, February 09, 1998 9:37 AM
> To: p1394@pwg.org
> Subject: Re: P1394> Rough SBP-2 & IP1394
core component
> ROM sizes
>
> At 02:04 PM 2/6/98 -0800, Greg Shue wrote:
>
> [snip]
>
> >I approached them about sharing some rough
estimates of code
> size
> >for the IP1394 glue, SBP-2 target and
initiator, and 1394 bus
> >manager modules to get a feel for how "heavy"
the protocol
> >implementations really are. They graciously
shared the flowing
> >estimates with us, and certainly deserve our
thanks. Since the
> >technology is still being developed, these
implementations are
> >certainly going to be tuned and the numbers
will change a
> little
> >bit.
> >
> > Component Rough ROM size
(KBytes)
> > ---------
-----------------------
> > SBP-2 initiator core 15 +/- 5
> > SBP-2 target core 15 +/- 5 (incl.
Mgmt+Fetch agent,
> no exec agent)
>
> Any idea how big a combined SBP-2
target/initiator would be?
> 15-30K? ;-)
>
> [snip]
>
> Brian
>
>
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> ‾
> Brian Batchelder | Hewlett-Packard |
> mailto:brianb@vcd.hp.com
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