Subject: Re: 68030....
To: Kyle A.D. Mestery <kamester@gloria.cord.edu>
From: Jason Thorpe <thorpej@nas.nasa.gov>
List: port-hp300
Date: 09/14/1996 12:55:24
On Sat, 14 Sep 1996 13:57:21 -0500 (CDT) 
 "Kyle A.D. Mestery" <kamester@gloria.cord.edu> wrote:

 > Well, I saved our old boot rom image, so that wont be a problem.  But I 
 > think now I should go back a little and further explain the problems I am 
 > having.  The Apollos I am working with are the 400 model with 68030.  
 > They have revision a boot roms.  As far as I understand up to this point 
 > in time, they will not be able to boot over the network with revision a 
 > boot roms.  So, I acquired what I thought would be the image for a 
 > revision c boot rom for my 400, but it is not.  I now must either put the 
 > old image back and again be stuck, or get a 68040 and a 50MHz crystal. 
 > One question: What are the chances of being able to succesfully netboot 
 > with the 68040/revision c boot rom?

Ok ... I should probably explain the wording (and perhaps adjust it) in 
the WWW and INSTALL documents...

In all the years that I've been playing with hp300 systems (about 6), 
I've never seen a 400-series with a "Rev A" ROM... The only systems I 
ever saw "Rev A" on were hp310s, and I've seen "Rev B" on hp320s.  On 
these older systems, the ROM didn't know how to do RMP (Remote 
Maintainance Protocol; the protocol used by rbootd).  That support was 
added in "Rev C" on the older hp300 systems...

I should probably clarify that in the relevant documentation...

 > I have also gone back and read the mailing list archives, and to my 
 > knowledge, if the machine can netboot, an option should appear on the 
 > boot options menu.  This has never happened.  I am running rbootd, 
 > rpc/bootparams and rarpd (although the latter two arent even used until I 
 > can get the SYS_NBOOT file to the apollos).  As far as I can tell, the 
 > most feasible option appears to be getting a 68040 and a 50MHz crystal.  
 > What does everyone else think?

Hmm ... well, that would certainly make your machine Much Faster... :-)

rbootd also has a debugging option to allow you to watch for boot 
requests from other hosts...

 -- save the ancient forests - http://www.bayarea.net/~thorpej/forest/ -- 
Jason R. Thorpe                                       thorpej@nas.nasa.gov
NASA Ames Research Center                               Home: 408.866.1912
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