[Simh] AXP Emulation?

[Villy Madsen]

----- Original Message -----
From: Brian Wheeler <bdwheele at indiana.edu>
Date: Monday, October 30, 2006 11:51 am
Subject: Re: [Simh] AXP Emulation?

> On Mon, 2006-10-30 at 19:33 +0100, Peter Lund wrote:
> > On Mon, 2006-10-30 at 11:20 -0500, Brian Wheeler wrote:
> > > Does anyone know of an alpha system emulation for Linux?  
> SRI's is only
> > > for Windows and doesn't run under wine :(
> > 
> > I just googled a bit -- I didn't find anything particularly
> > interesting :(
> > 
> > On the other hand, the CPU itself is very simple to emulate.  
> 
> Yeah, it does look that way.  I've been doing some 'light' reading on
> the alpha arch reference handbook, and I've requested the Alpha
> architecture reference manual from the campus library (a bonus to 
> beingat a uni!)
> 
> 
> > You will
> > have to choose a chipset -- Pyxis is probably not too hard.  
> Should be
> > possible to implement it within perhaps six months for a single 
> person> working part-time.  That probably won't be enough time to 
> make it fast
> > or nice -- just enough to make it work.  Just getting 
> /something/ up and
> > running should be much faster.
> > 
> 
> I started playing with this the other day, and I've been implementing
> instructions as the bootstrap needs them :)   
> 
> The Firmware is a bit of an issue, though.  The images from hp don't
> seem to be in any sort of usable format:  they're not rom dumps 
> (that I
> can tell, since they contain no text)   I've been using Linux's bootlx
> from aboot as a bootloader.  It steps through about 26 instructions
> until I end up at a call_pal halt.

Which is the processor Halt instruction.....

See section C-14 in the Architectual Manual...

My guess (Operative Word!) would be that something is happening that the boot code is not happy with!

Villy




> 
> Brian
> 
> > -Peter
> > 
> > 
> 
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