Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!rutgers!cbmvax!valentin
From: valentin@cbmvax.commodore.com (Valentin Pepelea)
Newsgroups: adsp.sw,comp.sys.amiga.tech
Subject: Re: ColdReboot() - The Never Ending Story?
Message-ID: <13847@cbmvax.commodore.com>
Date: 16 Aug 90 20:43:59 GMT
References: <03021.AA03021@babylon.UUCP>
Reply-To: valentin@cbmvax (Valentin Pepelea)
Organization: Commodore, West Chester, PA
Lines: 30

In article <03021.AA03021@babylon.UUCP> rbabel@babylon.UUCP (Ralph Babel)
writes:
>
> The original "ColdReboot()" (new Amiga Hardware Reference Manual, page 219)
> didn't work on some (IMHO) broken A2000s (Kickstart ROM doesn't reappear at
> location 0 after RESET).
>
> (e.g. it leaves the A1000's WCS write-enabled and does not work with GVP's
> '030 boot-ROMs - dunno about A2620/A2630). Presumably this bug also prevents
> the current versions of "MMUKick" and "SetCPU ROMBOOT" from working with
> boot-ROMs.

I'm not sure what you are talking about here. I wrote MMUkick with the
specific purpose to allow GVP accelerator owners to boot OS 2.0 kickfiles.
I even had to help GVP find out why initially, MMUkick would not work. To
fix that they had to replace their PALs with new ones which properly
propagate the *RESET signal frlom the CPU to external devices, and did not
inhibit the cache for CPU fetches from chip memory.

> So what about the following solution?

Self modifying code is dangerous to your health. In this case, remember to
Disable() all interrupts before entering the critical region.

Valentin
-- 
The Goddess of democracy? "The tyrants     Name:    Valentin Pepelea
may distroy a statue,  but they cannot     Phone:   (215) 431-9327
kill a god."                               UseNet:  cbmvax!valentin@uunet.uu.net
             - Ancient Chinese Proverb     Claimer: I not Commodore spokesman be