Re: [hatari-devel] Hatari display in Falcon ST high

["Roger Burrows" <rfburrows@xxxxxxxxx>]

On 20 Feb 2012 at 22:50, Eero Tamminen wrote:
> On maanantai 20 helmikuu 2012, Roger Burrows wrote:
> > When running in Falcon mode (68030+Falcon selected in System), Hatari
> > uses the STe palette registers as the source for colour[1] in ST high. 
> > It should use the Falcon palette registers, like a real Falcon does. 
> > This happens in Hatari 1.6.0 running under Windows.
> >
> > I have a test program that allows you to modify selected registers of
> > either the STe or Falcon palette.  The test program runs in TTP mode,
> > and modifying register 1 should immediately change the text colour from
> > the default black.
> > 
> > When run on a real Falcon or Aranym, modifying Falcon palette register 1
> > changes the colour; modifying STe palette register 1 has no effect.  When
> > run on Hatari 1.6.0, the reverse is true.
> 
> All these tests are done with TOS v4?
> 
Yes, TOS 4.04.

> According to "--trace videl" there are several shift register writes
> even on TOS v4 boot.  What are the STE and Falcon shift register values
> at this point?
> 
On a real Falcon, STshift = 00, SPSHIFT = 0400.

> 
> Aranym would seem to force use of STE palette when
> either in ST-low or in ST 4 or 2 color mode:

I don't think so ... Aranym uses the Falcon palette in ST High (see above).

> 
> Is there any documentation on what exactly would be the right
> behavior?
> 
I think how a real Falcon behaves is probably the only documentation :-).

Roger