Date   : Mon, 10 Apr 2006 10:02:27 +0100
From   : Andrew Benham <adsb@...>
Subject: Re: [Fwd: Re: Contikit anyone?]

Rob wrote:

> &f4 is (or should be) always a copy of what the OS thinks is the
> "current" ROM, i.e. the last value written to ROMSEL (which is
> write-only) but only on the B's - I think the Master stores this
> elsewhere.  You shouldn't manipulate this directly as you can really
> confuse things.

ROMSEL (&FE30) is write-only on the model B.  When writing to it,
you should write the same value to &F4 first.
On the Master, ROMSEL (&FE30) is read/write, but you should still
write to &F4 first.

-- 
Andrew Benham           adsb@...       
Southgate, London N14, United Kingdom

The gates in my computer are AND OR and NOT, not "Bill".