Path: utzoo!attcan!uunet!snorkelwacker!apple!portal!cup.portal.com!plav
From: plav@cup.portal.com (Rick M Plavnicky)
Newsgroups: comp.sys.amiga
Subject: Re: 2091 address zero problems
Message-ID: <31957@cup.portal.com>
Date: 21 Jul 90 16:21:53 GMT
References: <38936@sequent.UUCP> <3343@usceast.UUCP>
Organization: The Portal System (TM)
Lines: 60

On 7/18/90 yarnall@usceast.UUCP (Ken Yarnall) writes:

>In article <38936@sequent.UUCP> cseaman@sequent.UUCP (Chris "I'm Outta Here,
>+Well, here are the results of my attempt to fix the 2091 problem:
>+
>+First, I booted my Amiga (cold) from the unmodified backup of the A2091

[Chris' description of his FS update deleted]

>+If someone can point out where I erred, I would be most grateful.
>+Otherwise, I can only assume that there are different ROM revisions
>+out there on the 2091, and mine is different from those who don't
>+have the problem.  The only other possibility I can think of would
>+be a problem running the 2091 on my 2620-equipped rev 4.4 B2000-CR
>+motherboard.
>+
>+Any ideas?
>

[Ken's experiences with the ProWrite 3.0 upgrade deleted]

>[ProWrite..] said [...] the roms on the 2091 have some inadvertently released
>debugging software, that sets location zero to a non-NULL value.  He didn't
>explain to me why his program crashed because of this (which it should not
>have, IMHO), but he did say that his information came from Commodore.  He was
>clear in that the problem was in the rom, and not in the filesystem.
>

[A little more deleted...]

>My dealer hinted at a rom upgrade for the 2091 being forthcoming.  Any
>news??
>
>+Chris (Has anyone seen my) Seaman  
>
>kenny
>-- 
>         Ken Yarnall                 ///   yarnall@cs.scarolina.EDU
>          Math Department, USC   \\\///   yarnall@ucseast.UUCP
>           Columbia, S.C. 29208   \\\/   (803)777-6686

I recently had my 2000 in for warranty service.  (20 days and 2 motherboards
worth, but that's another story...)  Since it was there anyway, I asked the
dealer to install the new 2091 ROMs if they became available while my
machine was being serviced.  They did.

For reference, though, here are the part numbers for the ROMs in question:

              Original ROMs      Upgraded ROMs
              -------------      -------------
Even (U13)    390508-02          390721-01
Odd (U12)     390509-02          390722-01

Honestly, I've noticed no difference in the 2091's operation.  And I
never had any problems due to corruption of the longwords at location 0
in the first place (I must not run the 'right' software :)

So, yes, new ROMs are available.  Hope that helps.

/* Rick Plavnicky ...!sun!cup.portal.com!plav  -or-  plav@cup.portal.com */