[Coco] NitrOS-9 ROM Pak ?

[Roger Taylor]

At 08:02 PM 3/29/2009, you wrote:
>On 3/29/09, Roger Taylor wrote:
> >
> > I thought Boisy's FAQ talks about using a 16K ROM (for a CoCo 1/2?).
> > What about a 32K ROM.  I've never burned any to see if they map in at
> > $8000 or $C000 in two banks.  If they map in at $8000, it's the same
> > exact thing as desoldering the CoCo 3 BASIC ROM set chip if you can
> > just map the ROM in right or copy it down into the underlying RAM.
> >


>The CoCo 1 and 2 don't have a 32K External ROM mode like the CoCo 3.

That's correct.  Anyway, maybe just enough can fit in 16K to boot up 
NitrOS-9 Level Two and have a script load the rest from somewhere else.



>To get 32K ROM in a cartridge on those machines you need some extra
>hardware in the cartridge, either to employ a banking scheme or to do
>your own address decoding and utilize SLENB* to prevent the internal
>ROMS from being selected.


-- 
Roger Taylor

http://www.wordofthedayonline.com