Hi Denis,
Thanks for the tips. So, here is some information if you want to add it to the table on the
web page:
We have the ATI Radeon 9200 (PCI) in a G4 running OS 9 with the latest driver downloaded
from ATI's support page. The card has functional 10 bit DACs according to ScreenTest,
ClutTest and LoadClutTest, but TwoBitFlickerTest and our own photometric measurements
indicate that the last 2 bits are not actually affecting the displayed color. Below is the
output of some of the tests.
One thing I couldnt tell from the web page: Are the OS X drivers generally better at
supporting 10 bits?
Best,
Steve
-----
ScreenTest
*** 's Power Mac G4/400, Mac OS 9.2.2 ************************************
G4, 400 MHz, memory bus 100 MHz, 63.060 Mflop/s
Psychtoolbox 2.55, 12 March 2005, Matlab 5.2.0.3084
FileSharing is on.
Screen saver present, now disabled.
*** Screen 0 *************************************************************
"ATY,Bugsy_A" (.Display_DualHead version 1.0.1f58) in slot SLOT-C
10 bit dacs. 1152x870 73 Hz. (56,60,65,67,70,72,73,75,76,85,90,100,120,150,160,200
Hz avail)
Prefs: cscGetClutBehavior, cscGetNextResolution,
DipPriorityAfterSetClut, MinimumSetClutPriority 2.
- - - - - - - - - - - - - - - - - - - - - - - - -
pixel size 8 16 32 bits
pages 1 1 1
CopyWindow (ie CopyBits) 86 88 88 MB/s
CopyWindow (ie CopyBits) VRAM 1539 1520 1524 MB/s
SetClut suppresses ints. for 0.0 0.0 0.0 frames
LoadClut vs. GetClut? ( 8 bits) == == ==
LoadClut vs. GetClut? (10 bits) == == ==
- - - - - - - - - - - - - - - - - - - - - - - - -
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
LoadClutTest
*** 's Power Mac G4/400, Mac OS 9.2.2 ************************************
G4, 400 MHz, memory bus 100 MHz, 63.542 Mflop/s
Psychtoolbox 2.55, 12 March 2005, Matlab 5.2.0.3084
FileSharing is on.
Screen saver present, now disabled.
*** Screen 0 *************************************************************
"ATY,Bugsy_A" (.Display_DualHead version 1.0.1f58) in slot SLOT-C
10 bit dacs. 1152x870 75 Hz. (56,60,65,67,70,72,73,75,76,85,90,100,120,150,160,200
Hz avail)
Prefs: cscGetClutBehavior, cscGetNextResolution,
DipPriorityAfterSetClut, MinimumSetClutPriority 2.
- - - - - - - - - - - - - - - - - - - - - - - - -
8-bit gamma table. pixelSize 8. Success! GetClut==LoadClut at 8 bits.
8-bit gamma table. pixelSize 16. Success! GetClut==LoadClut at 8 bits.
8-bit gamma table. pixelSize 32. Success! GetClut==LoadClut at 8 bits.
10-bit gamma table. pixelSize 8. Success! GetClut==LoadClut at 10 bits.
10-bit gamma table. pixelSize 16. Success! GetClut==LoadClut at 10 bits.
10-bit gamma table. pixelSize 32. Success! GetClut==LoadClut at 10 bits.
**************************************************************************
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
ClutTest
*** 's Power Mac G4/400, Mac OS 9.2.2 ************************************
G4, 400 MHz, memory bus 100 MHz, 63.203 Mflop/s
Psychtoolbox 2.55, 12 March 2005, Matlab 5.2.0.3084
FileSharing is on.
Screen saver present, now disabled.
*** Screen 0 *************************************************************
"ATY,Bugsy_A" (.Display_DualHead version 1.0.1f58) in slot SLOT-C
10 bit dacs. 1152x870 75 Hz. (56,60,65,67,70,72,73,75,76,85,90,100,120,150,160,200
Hz avail)
Prefs: cscGetClutBehavior, cscGetNextResolution,
DipPriorityAfterSetClut, MinimumSetClutPriority 2.
WARNING: You're not running the latest Matlab, which is version 5.2.1.
Thus we can't use Gestalt to determine whether we're running Mac OS X
Classic. The graphics drivers under Classic require different settings.
Please upgrade Matlab to 5.2.1 or upgrade the Psychtoolbox to 2.53, when
it's released.
- - - - - - - - - - - - - - - - - - - - - - - - -
pixelSize 8. randomize 0. SetGamma 8 bits. GetGamma 8 bits. GetClut == predicted.
pixelSize 8. randomize 1. SetGamma 8 bits. GetGamma 8 bits. GetClut == predicted.
pixelSize 16. randomize 0. SetGamma 8 bits. GetGamma 8 bits. GetClut == predicted.
pixelSize 16. randomize 1. SetGamma 8 bits. GetGamma 8 bits. GetClut == predicted.
pixelSize 32. randomize 0. SetGamma 8 bits. GetGamma 8 bits. GetClut == predicted.
pixelSize 32. randomize 1. SetGamma 8 bits. GetGamma 8 bits. GetClut == predicted.
pixelSize 8. randomize 0. SetGamma 10 bits. GetGamma 10 bits. GetClut == predicted.
pixelSize 8. randomize 1. SetGamma 10 bits. GetGamma 10 bits. GetClut == predicted.
pixelSize 16. randomize 0. SetGamma 10 bits. GetGamma 10 bits. GetClut == predicted.
pixelSize 16. randomize 1. SetGamma 10 bits. GetGamma 10 bits. GetClut == predicted.
pixelSize 32. randomize 0. SetGamma 10 bits. GetGamma 10 bits. GetClut == predicted.
pixelSize 32. randomize 1. SetGamma 10 bits. GetGamma 10 bits. GetClut == predicted.
Screen driver supports gamma tables with precisions: 8 10 bits.
**************************************************************************
--- In psychtoolbox@yahoogroups.com, Denis Pelli <denis.pelli@...> wrote:
>
> dear steve
>
> yes, i worked on that. All the more modern Radeon cards have 10 bit
> DACs, but not all the OS 9 drivers actually pass 10-bits to the
> lookup table. (They're made by ATI.) At one point I had a long talk
> with one of the head engineers and it's my impression that all the
> drivers issued since then do have 10-bit support. One important
> difference turned out to be between drivers issued by ATI (retail
> cards) or by Apple (built-in). Their contract with apple specified
> that upgrades to the drivers for built-ins would ONLY be changed in
> response to requests (and presumably payment) from apple. ATI quickly
> added 10 bit support for all the retail cards, but i don't think that
> this happened for all the drivers for the built-in cards.
>
> thus, i suggest you make sure you've got the latest driver, and then,
> if your test indicates absence of 10-bit support, believe the result
> and move on.
>
>
> all my notes about this are here:
> http://psychtoolbox.org/mac.html#drivers
>
> i'd welcome any new information you think we should add to that page.
> i strongly suggest running ScreenTest for a thorough characterization
> of the card.
>
> best
>
> denis
>
>
>
> On Jul 10, 2006, at 3:23 PM, sengelweb wrote:
>
> >
> > Hi,
> >
> > Does anyone have experience using the Radeon 9200 in OS 9? I'm
> > trying to get it to work on
> > an old mac using the lastest os 9 version of psych. toolbox, and I
> > cant get the supposed 10-
> > bit DACs to function-- TwoBitFlickerTest fails, and when I measure
> > successive gray levels
> > (same nunber, between 0-1023, sent to all 3 DACs) with a good light
> > meter I only see
> > changes in luminance every 4 levels, as if its ignoring the last
> > two bits of the values I give it.
> >
> > Anyone work through this before?
> >
> > Thanks,
> >
> > Steve
> >
> > .
> >
> >
>
