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chatGPZ
Registered: Dec 2001
Posts: 11357 |
VICE PAL Emulation Patch
inspired by some of E.D.s comments i played with improving the PAL emu. read details in the txt.
http://hitmen.c02.at/temp/patch122-palemu.txt
http://hitmen.c02.at/temp/vice-1.22-palemu-0.diff
try it :)
example:
http://hitmen.c02.at/temp/old.png
http://hitmen.c02.at/temp/new.png |
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MagerValp
Registered: Dec 2001
Posts: 1074 |
Interesting stuff, this will make PAL emulation nearly 100%. |
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Sledge
Registered: Sep 2003
Posts: 102 |
Quote: nice one, btw being so faithfull.. how about emulating also the grey dots & the slightly visible vertical lines of charcolumns of newer VICIIs?
Perhaps I have missed this, but what is the "grey dots" effect on the newer VIC-II?
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tlr
Registered: Sep 2003
Posts: 1787 |
I never had a newer VIC-II myself, but I saw this the first time when the C128's started popping up. A grey dot appears in some cases when changing a color register like $d020.
Don't know the details either, but doing color splits, even if all colors are black can show this.
We deemed those new machines broken ofcourse, but then again linecrunch + vsp quite frequenctly froze my machine... :)
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MagerValp
Registered: Dec 2001
Posts: 1074 |
I think the color registers are multiplexed, and there's a timing glitch in the HMOS chips. When you write to the register it's unavailable for a short while from the picture generation circuit, and it gets floating inputs ($f), outputting a grey dot. I'm just guessing though, and have no details to back it up.
Either way, to emulate it you don't have to understand it perfectly :) Just output a half a pixel wide grey dot when updating the register.
YAPE, the plus/4 emulator, has grey dot emulation btw.
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tlr
Registered: Sep 2003
Posts: 1787 |
Ah, seems like a resonable theory.
AFAIK outputing half a pixel isn't supported in the core raster emulation code of vice currently though.
(common to all platforms) |
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chatGPZ
Registered: Dec 2001
Posts: 11357 |
so, did anyone try the darn patch? =P |
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Scout
Registered: Dec 2002
Posts: 1570 |
Quote: so, did anyone try the darn patch? =P
Well, if there was a Windows binary I would have...
Sorry ;) |
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tlr
Registered: Sep 2003
Posts: 1787 |
The screen shots look really nice, maybe we'll drop this into VICEplus? |
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chatGPZ
Registered: Dec 2001
Posts: 11357 |
it might need some additional patches to work with 256 colors, not sure .... try it =) |
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Ed
Registered: May 2004
Posts: 173 |
Ok. so I built my own vice with the Groepaz patch using Ubuntu 8.04 LTS
First I downloaded the latest vice 1-22.tar.gz (source file) then I just put it in my Documents folder (you can of course put it anywhere you feel like storing it... Like for instance in your games folder.
i go to the System-> Administrator Tools -> Synaptic Package Manager and make sure I have build-essential and libxaw7-dev. (Just search for these, mark them and install them and their dependencies). (Yeah I know. commands rule, mouse gestures and windows dont :P )
Ok we are ready to start. Open a terminal: Applications -> Acessories -> Terminal:
cd Documents
farbraus.d64
vice-1.22-palemu-0.diff
patch122-palemu.txt Play_With_Colours_by_Wrath_Designs.d64
vice-1.22.tar.gz
tar -xvf vice-1.22.tar.gz
... it runs it untar thing...
patch -p1 < vice-1.22-palemu-0.diff
... it patches. Please keep the .diff file outside of
the vice 1-22 folder when patching...
then i enter the vice 1-22 folder, and write
make
... it runs it thing...
sudo make install
ok, if nothing went wrong you should be able to run the vice-emu, with command:
sudo x64
.. this because we want to change stuff and then save setting...
make sure to activate pal emulation and exakt colours...
I ran the Play_With_Colours_by_Wrath_Designs.d64
and it looked good. Also, I ran the good old demo
where the last graphics upscroller flicker very nicely, just like on the c64. Oh and even the Mirage
football look great :)
So. Incorporate this into vice emulator, dear vice creators and please throw in some easy to use
gliders/sliders/setting boxes, or anything else to make it tweakable... (did not get that working
here ok... but hey.. Ubuntu since 2008 04 24 -> only :) )
Oh, and remember that farbraus does not look that extra
cool run with true pal emulation :P
Respect
/Eddie |
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