Ralf Baechle writes:
> On Fri, Jan 14, 2000 at 05:56:13AM +0100, Soren S. Jorvang wrote:
> > On Thu, Jan 13, 2000 at 10:56:25PM -0500, John Michael Clemens wrote:
> > > Would there be enough in this firmware to do a basic text console? even
> > > that would be better than soldering together a serial cable to run over
> > > Minicom.
> > You can always use the PROM callbacks for that.
> In theory yes. In practice all firmware that I've seen so far seems to
> be rather fragile and for some systems also very performance limited as
> it's running from uncached memory (veeeerry slooow) or at times even
> from 8-bit wide PROMs which is so slow that it blows every meassure for
> slowness. Not to mention other problems. So this should really be
> considered a better than nothing solution.
> That being said, Ulf Carlsson has implemented a PROM console which is
> in the CVS archive. Try it, I'm interested in reports.
On some platforms the PROM code is actually copied to main memory
and executed (cached) from there. If I remember correctly, O2 works that
way. Indy is probably in the slow (possibly very slow) category.