Re: [hatari-devel] More RAM for Christmas :-)

[Adam Klobukowski <adamklobukowski@xxxxxxxxx>]

TT-RAM support is a good feature for new official version, if you ask me ;)

AdamK

2014-12-24 19:51 GMT+01:00 <laurent.sallafranque@xxxxxxx>:

Thanks a lot Nicolas, I'll test this a lot when I'm back to home.

Happy christmas too

----- Mail original -----
De: "Nicolas Pomarède" <npomarede@xxxxxxxxxxxx>
À: hatari-devel@xxxxxxxxxxxxxxxxxxx
Envoyé: Mercredi 24 Décembre 2014 19:45:52
Objet: [hatari-devel] More RAM for Christmas :-)

Hi

just in time for Christmas, TT RAM support should now be fixed for TT
mode and Falcon mode.

Extra RAM will be added whether fast boot is enabled or not, so you can
keep fast boot=true if you want (although it's not recommanded for
better STF/STE compatibility, and it doesn't speed boot that much anyway
:) )

There were some crashes to fix for TOS 4.04 and Falcon, because TOS
would try to blit from ST RAM to TT RAM, but the blitter in a normal
Falcon is not supposed to access memory above 24 bit. You would get some
neraly immediate crashes when moving icons or printing text.

So, when 32 bit addressing mode is selected in Falcon mode, this will
allow 32 bit addresses for CPU and blitter.

A 32 bit blitter doesn't really exist in Atari's models, but extra 32
bit RAM doesn't exist either in a plain Falcon, so we get some kind of
hybrid model between a real Falcon and a Falcon with a CT extension
board for example.

The TT doesn't have this problem, because it doesn't have a blitter :)

Merry christmas !


Nicolas

--

Semper Fidelis

Adam Klobukowski
adamklobukowski@xxxxxxxxx