[uae] More on the V-synced, Linux-based E-UAE
- From: "Manuel Alfayate" <gaula88@xxxxxxxxxxx>
- To: uae@xxxxxxxxxxxxx
- Date: Thu, 15 Mar 2007 11:14:17 +0000
Hello again, and thanks for the response on my topic.
Well, I can confirm that: the ONLY chipset that can be found on a Power-PC
based MAC MINI is the ATI 9200 (which I believe has the R200 chip inside, a
well supported chip under Linux as it has over-average quality open source
video drivers including 2D and 3D acceleration). It's also the most popular
chipset used on the PEGASOS and a cheap, silent option for
emulation-oriented Pc's :D
As for the DirectFB backend for E-UAE, I think it's a great idea: DirectFB
allows the definition of custom video modes (I have defined a perfect PAL
video mode that works with E-UAE after setting it with fbset: I can post the
geometry and timmings if you are interested; the only problem is tearing, as
Ritcher said).
In the other hand, when definig a video mode for fbset you can specify the
pixel clock (pixel lengh in picosecs) along with the vysnc lengh and hsync
lengh: you can also specify the vsync and hsync polarity. There are even a
coulple of files included with those libraries, namely fbmodes.PAL and
fbmodes.NTSC, that provide broadcast-exact video modes; they are 15Hz
(H-freq) and have to be modified for usage on a PC monitor, wich usually
supports only >30Hz H-freq...
So, in a nutshell, you could use the DirectFB backend to specify a frequency
using fbset code and vsync (Vsync doesn't work under Linux right now, as far
as I have tried: it just makes the whole system unestable) and easily
implement a "frequency" line for the uaerc. I think there's souch a feature
in WinUAE.
As for the MAC OSX-built version, it's Vsync works: Does anyone know where
MAC OSX stores it's video modes? Manually definig a 50Hz videomode should be
possible.
There are at least three programs that I know about (DisplayX, SwitchresX
and resX) that allow custom video-mode definition, including vertical and
horizontal frequencies, for MAC OSX, but using this stuff to set up the
system before running an emulator requires loading a full Aqua enviroment...
I tried to contact the authors for info, but no luck (as expected). Has Mac
OS X a FrameBuffer device at Darwin level to try using fbset under MACOSX?
Thanks people, and sorry for souch a LONG writing!
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