Date   : Wed, 07 Jan 2015 12:04:51 +0000
From   : nicolagiacobbe@... (nicola giacobbe)
Subject: Serial console active at power-on

Being flooded with good suggestions I am resuming here what the big minds
suggest:

1) The MOS EPROM (I was on the verge of writing FLASH...) can be changed
and there inside I can find a table with the default value of many FX calls
so it should be 'simply' a factor of making the correct changes:
> > In the mos there is a table of default values for the *FX settings, so my
> > approach was to edit that to give different default values for *FX2 and
> > *FX3.  
> >
> > I have found my notes from 1987.  this may need some corroboration but it
> > looks like the rom locations in question may be as follows.
> > OSBYTE  RAM  ROM
> > 177 &B1 241    D981 is 0 make 1 input source
> > 181 &B5 245   D985 is 1 possibly make 0
> > 236 &EC 27C   D9BC is 0 possibly make 1 (*FX3)
> > 245 &F5 285   D9C5 is 1 possibly make 0 (default printer) 
> > Alan

2) To avoid locking due to paged mode a byte at location &C592 must be changed:
> And while you are at it replace the byte &04 at location &C592 with &00
> 
> That will stop VDU 14 from ever setting the page mode bit...
> 
> /John

I am just a little troubled by the correct addresses: are we sure that the
address are stable among ROM versions on the beeb? And on the Master? I suppose
I should first disassemble the ROM...