leopard compatibility

1
Hello,

Does anyone know whether MacOS-X 10.5 (leopard) will be immediately
compatible with Psychophysics Toolbox? Do any of the changes change
things in a way that could cause problems?

Thanks,
Rob

--
http://www.nmr.mgh.harvard.edu/~levy/
2
Given that Leopard isn't available yet, no one can know.

But from the technical specs that are available at the moment,
i wouldn't expect any incompatibilities by design.

Of course its always possible that Leopord contains some
new bugs along with all the new features and these bugs
could interfere, but that wouldn't be by design.

I hope that there will be a few significant improvements,
especially in the areas of anti-aliasing and fast creation
of high-precision/HDR stimuli. Tiger lacks a few useful
functions there which are available on Linux and Windows
since over a year. Timing behaviour is also an area where
i would expect some further improvements, given the
redesigned scheduler (now optimized for multi-cores),
although the quality of timing of Tiger was already lightyears
ahead of the beautiful products from Redmond.

-mario


--- In psychtoolbox@yahoogroups.com, Robert Levy <levy@...> wrote:
>
> Hello,
>
> Does anyone know whether MacOS-X 10.5 (leopard) will be immediately
> compatible with Psychophysics Toolbox? Do any of the changes change
> things in a way that could cause problems?
>
> Thanks,
> Rob
>
> --
> http://www.nmr.mgh.harvard.edu/~levy/
>
3
OK, I just installed Leopard (on my macbook pro) and so far psychtoolbox seems to be
running well. I am not sure if I would recommend upgrading experimental machines to
Leopard quite yet, but at least it seems fine for code development.

If anyone wants me to test something specific let me know (so far I have tested dotdemo
as well as some of my own experimental programs).

Best,

-Aaron

--- In psychtoolbox@yahoogroups.com, "Mario Kleiner" <mario.kleiner@...> wrote:
>
> Given that Leopard isn't available yet, no one can know.
>
> But from the technical specs that are available at the moment,
> i wouldn't expect any incompatibilities by design.
>
> Of course its always possible that Leopord contains some
> new bugs along with all the new features and these bugs
> could interfere, but that wouldn't be by design.
>
> I hope that there will be a few significant improvements,
> especially in the areas of anti-aliasing and fast creation
> of high-precision/HDR stimuli. Tiger lacks a few useful
> functions there which are available on Linux and Windows
> since over a year. Timing behaviour is also an area where
> i would expect some further improvements, given the
> redesigned scheduler (now optimized for multi-cores),
> although the quality of timing of Tiger was already lightyears
> ahead of the beautiful products from Redmond.
>
> -mario
>
>
> --- In psychtoolbox@yahoogroups.com, Robert Levy <levy@> wrote:
> >
> > Hello,
> >
> > Does anyone know whether MacOS-X 10.5 (leopard) will be immediately
> > compatible with Psychophysics Toolbox? Do any of the changes change
> > things in a way that could cause problems?
> >
> > Thanks,
> > Rob
> >
> > --
> > http://www.nmr.mgh.harvard.edu/~levy/
> >
>
4
Oops, typo: Also post the full output of DotDemo.m please.
-mario

--- In psychtoolbox@yahoogroups.com, "Mario Kleiner" <mario.kleiner@...> wrote:
>
> Good to know.
>
> Can you run "BitsPlusImagingPipelineTest" and post its output?
> And also post the Radeon X1600 or with NVidia Geforce8600M?
>
> thanks,
> -mario
>
> --- In psychtoolbox@yahoogroups.com, "aseitz" <aseitz@> wrote:
> >
> > OK, I just installed Leopard (on my macbook pro) and so far psychtoolbox seems to
be
> > running well. I am not sure if I would recommend upgrading experimental machines
to
> > Leopard quite yet, but at least it seems fine for code development.
> >
> > If anyone wants me to test something specific let me know (so far I have tested
dotdemo
> > as well as some of my own experimental programs).
> >
> > Best,
> >
> > -Aaron
> >
> > --- In psychtoolbox@yahoogroups.com, "Mario Kleiner" <mario.kleiner@> wrote:
> > >
> > > Given that Leopard isn't available yet, no one can know.
> > >
> > > But from the technical specs that are available at the moment,
> > > i wouldn't expect any incompatibilities by design.
> > >
> > > Of course its always possible that Leopord contains some
> > > new bugs along with all the new features and these bugs
> > > could interfere, but that wouldn't be by design.
> > >
> > > I hope that there will be a few significant improvements,
> > > especially in the areas of anti-aliasing and fast creation
> > > of high-precision/HDR stimuli. Tiger lacks a few useful
> > > functions there which are available on Linux and Windows
> > > since over a year. Timing behaviour is also an area where
> > > i would expect some further improvements, given the
> > > redesigned scheduler (now optimized for multi-cores),
> > > although the quality of timing of Tiger was already lightyears
> > > ahead of the beautiful products from Redmond.
> > >
> > > -mario
> > >
> > >
> > > --- In psychtoolbox@yahoogroups.com, Robert Levy <levy@> wrote:
> > > >
> > > > Hello,
> > > >
> > > > Does anyone know whether MacOS-X 10.5 (leopard) will be immediately
> > > > compatible with Psychophysics Toolbox? Do any of the changes change
> > > > things in a way that could cause problems?
> > > >
> > > > Thanks,
> > > > Rob
> > > >
> > > > --
> > > > http://www.nmr.mgh.harvard.edu/~levy/
> > > >
> > >
> >
>
5
Hi Mario,

My Macbook Pro has the GeForce 8600M GT video card with 256MB of RAM. I am using
matlab 7.5.0.338 (R2007b) and PsychtoolboxVersion 3.0.8 - Flavor: beta - Corresponds to
SVN Revision 884.

I have included the outputs from DotDemo and BitsPlusImagingPipelineTest below.

Best,

-Aaron

__________________________________________________________________________________
Here is the output from DotDemo.m

doublebuffer =
1


PTB-INFO: This is the OpenGL-Psychtoolbox version 3.0.8. Type 'PsychtoolboxVersion' for
more detailed version information.
PTB-INFO: Psychtoolbox is licensed to you under terms of the GNU General Public License
(GPL). See file 'License.txt' in the
PTB-INFO: Psychtoolbox root folder for a copy of the GPL license.



OpenGL-Extensions are: GL_ARB_transpose_matrix GL_ARB_vertex_program
GL_ARB_vertex_blend GL_ARB_window_pos GL_ARB_shader_objects GL_ARB_vertex_shader
GL_EXT_multi_draw_arrays GL_EXT_clip_volume_hint GL_EXT_rescale_normal
GL_EXT_draw_range_elements GL_EXT_fog_coord GL_EXT_gpu_program_parameters
GL_APPLE_client_storage GL_APPLE_specular_vector GL_APPLE_transform_hint
GL_APPLE_packed_pixels GL_APPLE_fence GL_APPLE_vertex_array_object
GL_APPLE_vertex_program_evaluators GL_APPLE_element_array GL_APPLE_flush_render
GL_APPLE_aux_depth_stencil GL_NV_texgen_reflection GL_NV_light_max_exponent
GL_IBM_rasterpos_clip GL_SGIS_generate_mipmap GL_ARB_shading_language_100
GL_ARB_imaging GL_ARB_point_parameters GL_ARB_texture_env_crossbar
GL_ARB_texture_border_clamp GL_ARB_multitexture GL_ARB_texture_env_add
GL_ARB_texture_cube_map GL_ARB_texture_env_dot3 GL_ARB_multisample
GL_ARB_texture_env_combine GL_ARB_texture_compression
GL_ARB_texture_mirrored_repeat GL_ARB_shadow GL_ARB_depth_texture
GL_ARB_fragment_program GL_ARB_fragment_program_shadow GL_ARB_fragment_shader
GL_ARB_occlusion_query GL_ARB_point_sprite GL_ARB_texture_non_power_of_two
GL_ARB_vertex_buffer_object GL_ARB_pixel_buffer_object GL_ARB_draw_buffers
GL_ARB_shader_texture_lod GL_EXT_compiled_vertex_array GL_EXT_framebuffer_object
GL_EXT_texture_rectangle GL_ARB_texture_rectangle GL_EXT_texture_env_add
GL_EXT_blend_color GL_EXT_blend_minmax GL_EXT_blend_subtract
GL_EXT_texture_lod_bias GL_EXT_abgr GL_EXT_bgra GL_EXT_stencil_wrap
GL_EXT_texture_filter_anisotropic GL_EXT_secondary_color GL_EXT_blend_func_separate
GL_EXT_shadow_funcs GL_EXT_stencil_two_side GL_EXT_depth_bounds_test
GL_EXT_texture_compression_s3tc GL_EXT_texture_compression_dxt1
GL_EXT_texture_sRGB GL_EXT_blend_equation_separate GL_EXT_texture_mirror_clamp
GL_EXT_packed_depth_stencil GL_EXT_geometry_shader4 GL_EXT_transform_feedback
GL_EXT_gpu_shader4 GL_APPLE_flush_buffer_range GL_APPLE_ycbcr_422
GL_APPLE_vertex_array_range GL_APPLE_texture_range GL_APPLE_float_pixels
GL_ATI_texture_float GL_ARB_texture_float GL_ARB_half_float_pixel GL_APPLE_pixel_buffer
GL_APPLE_object_purgeable GL_NV_point_sprite GL_NV_register_combiners
GL_NV_register_combiners2 GL_NV_blend_square GL_NV_texture_shader
GL_NV_texture_shader2 GL_NV_texture_shader3 GL_NV_fog_distance GL_NV_depth_clamp
GL_NV_multisample_filter_hint GL_NV_fragment_program_option
GL_NV_fragment_program2 GL_NV_vertex_program2_option GL_NV_vertex_program3
GL_ATI_texture_mirror_once GL_ATI_texture_env_combine3 GL_ATI_separate_stencil
GL_SGIS_texture_edge_clamp GL_SGIS_texture_lod



PTB-INFO: OpenGL-Renderer is NVIDIA Corporation :: NVIDIA GeForce 8600M GT OpenGL
Engine :: 2.0 NVIDIA-1.5.16
PTB-INFO: Renderer has 256 MB of VRAM and a maximum 242 MB of texture memory.
PTB-Info: VBL startline = 900 , VBL Endline = 900
PTB-Info: Measured monitor refresh interval from beamposition = 16.742675 ms
[59.727612 Hz].
PTB-Info: Will use beamposition query for accurate Flip time stamping.
PTB-Info: Measured monitor refresh interval from VBLsync = 16.750103 ms [59.701124
Hz]. (50 valid samples taken, stddev=0.065576 ms.)
PTB-Info: Small deviations between reported values are normal and no reason to worry.


WARNING: PTB's Screen('Flip') command missed the requested stimulus presentation
deadline
WARNING: a total of 1 times during this session!

__________________________________________________________________________________

And here is the output from BitsPlusImagingPipelineTest

Converting test stim to color++ format
PTB-WARNING: Switching and query of color clamping via glClampColorARB unsupported
by your graphics hardware.
PTB-WARNING: Could not disable color value clamping as requested. Unsupported by your
graphics hardware?
Building a fragment shader:Reading shader from file
/Applications/Psychtoolbox/PsychOpenGL/PsychGLSLShaders/Bits++_Color++_Formattin
gShader.frag.txt ...


WARNING: PTB's Screen('Flip') command missed the requested stimulus presentation
deadline
WARNING: a total of 1 times during this session!

Maximum raw data difference: red= 0.000000 green = 0.000000 blue = 0.000000


------------------- Color++ test success! --------------------------------
-----

Converting test stim to mono++ format
PTB-WARNING: Switching and query of color clamping via glClampColorARB unsupported
by your graphics hardware.
PTB-WARNING: Could not disable color value clamping as requested. Unsupported by your
graphics hardware?
Building a fragment shader:Reading shader from file
/Applications/Psychtoolbox/PsychOpenGL/PsychGLSLShaders/Bits++_Mono++_Formattin
gShader.frag.txt ...

Maximum raw data difference: red= 0.000000 green = 0.000000 blue = 0.000000


------------------- Mono++ test success! --------------------------------
-----

BitsPlusPlus imaging pipeline verified to work correctly. Validation info stored.

__________________________________________________________________________________



--- In psychtoolbox@yahoogroups.com, "Mario Kleiner" <mario.kleiner@...> wrote:
>
> Oops, typo: Also post the full output of DotDemo.m please.
> -mario
>
> --- In psychtoolbox@yahoogroups.com, "Mario Kleiner" <mario.kleiner@> wrote:
> >
> > Good to know.
> >
> > Can you run "BitsPlusImagingPipelineTest" and post its output?
> > And also post the Radeon X1600 or with NVidia Geforce8600M?
> >
> > thanks,
> > -mario
> >
> > --- In psychtoolbox@yahoogroups.com, "aseitz" <aseitz@> wrote:
> > >
> > > OK, I just installed Leopard (on my macbook pro) and so far psychtoolbox seems to
> be
> > > running well. I am not sure if I would recommend upgrading experimental
machines
> to
> > > Leopard quite yet, but at least it seems fine for code development.
> > >
> > > If anyone wants me to test something specific let me know (so far I have tested
> dotdemo
> > > as well as some of my own experimental programs).
> > >
> > > Best,
> > >
> > > -Aaron
> > >
> > > --- In psychtoolbox@yahoogroups.com, "Mario Kleiner" <mario.kleiner@> wrote:
> > > >
> > > > Given that Leopard isn't available yet, no one can know.
> > > >
> > > > But from the technical specs that are available at the moment,
> > > > i wouldn't expect any incompatibilities by design.
> > > >
> > > > Of course its always possible that Leopord contains some
> > > > new bugs along with all the new features and these bugs
> > > > could interfere, but that wouldn't be by design.
> > > >
> > > > I hope that there will be a few significant improvements,
> > > > especially in the areas of anti-aliasing and fast creation
> > > > of high-precision/HDR stimuli. Tiger lacks a few useful
> > > > functions there which are available on Linux and Windows
> > > > since over a year. Timing behaviour is also an area where
> > > > i would expect some further improvements, given the
> > > > redesigned scheduler (now optimized for multi-cores),
> > > > although the quality of timing of Tiger was already lightyears
> > > > ahead of the beautiful products from Redmond.
> > > >
> > > > -mario
> > > >
> > > >
> > > > --- In psychtoolbox@yahoogroups.com, Robert Levy <levy@> wrote:
> > > > >
> > > > > Hello,
> > > > >
> > > > > Does anyone know whether MacOS-X 10.5 (leopard) will be immediately
> > > > > compatible with Psychophysics Toolbox? Do any of the changes change
> > > > > things in a way that could cause problems?
> > > > >
> > > > > Thanks,
> > > > > Rob
> > > > >
> > > > > --
> > > > > http://www.nmr.mgh.harvard.edu/~levy/
> > > > >
> > > >
> > >
> >
>
6
thanks for doing this. Could you also run StereoDemo(1) and tell
me if it properly switches into frame sequential stereo mode,
ie. you see the flickering/alternating stereo stim and the sync
line drawn at the bottom of your screen?

thanks,
-mario

--- In psychtoolbox@yahoogroups.com, "aseitz" <aseitz@...> wrote:
>
> Hi Mario,
>
> My Macbook Pro has the GeForce 8600M GT video card with 256MB of RAM. I am using
> matlab 7.5.0.338 (R2007b) and PsychtoolboxVersion 3.0.8 - Flavor: beta - Corresponds
to
> SVN Revision 884.
>
> I have included the outputs from DotDemo and BitsPlusImagingPipelineTest below.
>
> Best,
>
> -Aaron
>
> __________________________________________________________________________________
> Here is the output from DotDemo.m
>
> doublebuffer =
> 1
>
>
> PTB-INFO: This is the OpenGL-Psychtoolbox version 3.0.8. Type 'PsychtoolboxVersion'
for
> more detailed version information.
> PTB-INFO: Psychtoolbox is licensed to you under terms of the GNU General Public
License
> (GPL). See file 'License.txt' in the
> PTB-INFO: Psychtoolbox root folder for a copy of the GPL license.
>
>
>
> OpenGL-Extensions are: GL_ARB_transpose_matrix GL_ARB_vertex_program
> GL_ARB_vertex_blend GL_ARB_window_pos GL_ARB_shader_objects
GL_ARB_vertex_shader
> GL_EXT_multi_draw_arrays GL_EXT_clip_volume_hint GL_EXT_rescale_normal
> GL_EXT_draw_range_elements GL_EXT_fog_coord GL_EXT_gpu_program_parameters
> GL_APPLE_client_storage GL_APPLE_specular_vector GL_APPLE_transform_hint
> GL_APPLE_packed_pixels GL_APPLE_fence GL_APPLE_vertex_array_object
> GL_APPLE_vertex_program_evaluators GL_APPLE_element_array GL_APPLE_flush_render
> GL_APPLE_aux_depth_stencil GL_NV_texgen_reflection GL_NV_light_max_exponent
> GL_IBM_rasterpos_clip GL_SGIS_generate_mipmap GL_ARB_shading_language_100
> GL_ARB_imaging GL_ARB_point_parameters GL_ARB_texture_env_crossbar
> GL_ARB_texture_border_clamp GL_ARB_multitexture GL_ARB_texture_env_add
> GL_ARB_texture_cube_map GL_ARB_texture_env_dot3 GL_ARB_multisample
> GL_ARB_texture_env_combine GL_ARB_texture_compression
> GL_ARB_texture_mirrored_repeat GL_ARB_shadow GL_ARB_depth_texture
> GL_ARB_fragment_program GL_ARB_fragment_program_shadow
GL_ARB_fragment_shader
> GL_ARB_occlusion_query GL_ARB_point_sprite GL_ARB_texture_non_power_of_two
> GL_ARB_vertex_buffer_object GL_ARB_pixel_buffer_object GL_ARB_draw_buffers
> GL_ARB_shader_texture_lod GL_EXT_compiled_vertex_array GL_EXT_framebuffer_object
> GL_EXT_texture_rectangle GL_ARB_texture_rectangle GL_EXT_texture_env_add
> GL_EXT_blend_color GL_EXT_blend_minmax GL_EXT_blend_subtract
> GL_EXT_texture_lod_bias GL_EXT_abgr GL_EXT_bgra GL_EXT_stencil_wrap
> GL_EXT_texture_filter_anisotropic GL_EXT_secondary_color GL_EXT_blend_func_separate
> GL_EXT_shadow_funcs GL_EXT_stencil_two_side GL_EXT_depth_bounds_test
> GL_EXT_texture_compression_s3tc GL_EXT_texture_compression_dxt1
> GL_EXT_texture_sRGB GL_EXT_blend_equation_separate GL_EXT_texture_mirror_clamp
> GL_EXT_packed_depth_stencil GL_EXT_geometry_shader4 GL_EXT_transform_feedback
> GL_EXT_gpu_shader4 GL_APPLE_flush_buffer_range GL_APPLE_ycbcr_422
> GL_APPLE_vertex_array_range GL_APPLE_texture_range GL_APPLE_float_pixels
> GL_ATI_texture_float GL_ARB_texture_float GL_ARB_half_float_pixel
GL_APPLE_pixel_buffer
> GL_APPLE_object_purgeable GL_NV_point_sprite GL_NV_register_combiners
> GL_NV_register_combiners2 GL_NV_blend_square GL_NV_texture_shader
> GL_NV_texture_shader2 GL_NV_texture_shader3 GL_NV_fog_distance
GL_NV_depth_clamp
> GL_NV_multisample_filter_hint GL_NV_fragment_program_option
> GL_NV_fragment_program2 GL_NV_vertex_program2_option GL_NV_vertex_program3
> GL_ATI_texture_mirror_once GL_ATI_texture_env_combine3 GL_ATI_separate_stencil
> GL_SGIS_texture_edge_clamp GL_SGIS_texture_lod
>
>
>
> PTB-INFO: OpenGL-Renderer is NVIDIA Corporation :: NVIDIA GeForce 8600M GT
OpenGL
> Engine :: 2.0 NVIDIA-1.5.16
> PTB-INFO: Renderer has 256 MB of VRAM and a maximum 242 MB of texture memory.
> PTB-Info: VBL startline = 900 , VBL Endline = 900
> PTB-Info: Measured monitor refresh interval from beamposition = 16.742675 ms
> [59.727612 Hz].
> PTB-Info: Will use beamposition query for accurate Flip time stamping.
> PTB-Info: Measured monitor refresh interval from VBLsync = 16.750103 ms [59.701124
> Hz]. (50 valid samples taken, stddev=0.065576 ms.)
> PTB-Info: Small deviations between reported values are normal and no reason to worry.
>
>
> WARNING: PTB's Screen('Flip') command missed the requested stimulus presentation
> deadline
> WARNING: a total of 1 times during this session!
>
> __________________________________________________________________________________
>
> And here is the output from BitsPlusImagingPipelineTest
>
> Converting test stim to color++ format
> PTB-WARNING: Switching and query of color clamping via glClampColorARB
unsupported
> by your graphics hardware.
> PTB-WARNING: Could not disable color value clamping as requested. Unsupported by
your
> graphics hardware?
> Building a fragment shader:Reading shader from file
> /Applications/Psychtoolbox/PsychOpenGL/PsychGLSLShaders/Bits++_Color+
+_Formattin
> gShader.frag.txt ...
>
>
> WARNING: PTB's Screen('Flip') command missed the requested stimulus presentation
> deadline
> WARNING: a total of 1 times during this session!
>
> Maximum raw data difference: red= 0.000000 green = 0.000000 blue = 0.000000
>
>
> ------------------- Color++ test success! --------------------------------
> -----
>
> Converting test stim to mono++ format
> PTB-WARNING: Switching and query of color clamping via glClampColorARB
unsupported
> by your graphics hardware.
> PTB-WARNING: Could not disable color value clamping as requested. Unsupported by
your
> graphics hardware?
> Building a fragment shader:Reading shader from file
> /Applications/Psychtoolbox/PsychOpenGL/PsychGLSLShaders/Bits++_Mono+
+_Formattin
> gShader.frag.txt ...
>
> Maximum raw data difference: red= 0.000000 green = 0.000000 blue = 0.000000
>
>
> ------------------- Mono++ test success! --------------------------------
> -----
>
> BitsPlusPlus imaging pipeline verified to work correctly. Validation info stored.
>
> __________________________________________________________________________________
>
>
>
> --- In psychtoolbox@yahoogroups.com, "Mario Kleiner" <mario.kleiner@> wrote:
> >
> > Oops, typo: Also post the full output of DotDemo.m please.
> > -mario
> >
> > --- In psychtoolbox@yahoogroups.com, "Mario Kleiner" <mario.kleiner@> wrote:
> > >
> > > Good to know.
> > >
> > > Can you run "BitsPlusImagingPipelineTest" and post its output?
> > > And also post the Radeon X1600 or with NVidia Geforce8600M?
> > >
> > > thanks,
> > > -mario
> > >
> > > --- In psychtoolbox@yahoogroups.com, "aseitz" <aseitz@> wrote:
> > > >
> > > > OK, I just installed Leopard (on my macbook pro) and so far psychtoolbox seems
to
> > be
> > > > running well. I am not sure if I would recommend upgrading experimental
> machines
> > to
> > > > Leopard quite yet, but at least it seems fine for code development.
> > > >
> > > > If anyone wants me to test something specific let me know (so far I have tested
> > dotdemo
> > > > as well as some of my own experimental programs).
> > > >
> > > > Best,
> > > >
> > > > -Aaron
> > > >
> > > > --- In psychtoolbox@yahoogroups.com, "Mario Kleiner" <mario.kleiner@> wrote:
> > > > >
> > > > > Given that Leopard isn't available yet, no one can know.
> > > > >
> > > > > But from the technical specs that are available at the moment,
> > > > > i wouldn't expect any incompatibilities by design.
> > > > >
> > > > > Of course its always possible that Leopord contains some
> > > > > new bugs along with all the new features and these bugs
> > > > > could interfere, but that wouldn't be by design.
> > > > >
> > > > > I hope that there will be a few significant improvements,
> > > > > especially in the areas of anti-aliasing and fast creation
> > > > > of high-precision/HDR stimuli. Tiger lacks a few useful
> > > > > functions there which are available on Linux and Windows
> > > > > since over a year. Timing behaviour is also an area where
> > > > > i would expect some further improvements, given the
> > > > > redesigned scheduler (now optimized for multi-cores),
> > > > > although the quality of timing of Tiger was already lightyears
> > > > > ahead of the beautiful products from Redmond.
> > > > >
> > > > > -mario
> > > > >
> > > > >
> > > > > --- In psychtoolbox@yahoogroups.com, Robert Levy <levy@> wrote:
> > > > > >
> > > > > > Hello,
> > > > > >
> > > > > > Does anyone know whether MacOS-X 10.5 (leopard) will be immediately
> > > > > > compatible with Psychophysics Toolbox? Do any of the changes change
> > > > > > things in a way that could cause problems?
> > > > > >
> > > > > > Thanks,
> > > > > > Rob
> > > > > >
> > > > > > --
> > > > > > http://www.nmr.mgh.harvard.edu/~levy/
> > > > > >
> > > > >
> > > >
> > >
> >
>
7
Apparently they work with the NVidia Geforce8600M inside the new
MacBookPro's - both on Tiger 10.4.10 and Leopard, and also with
the NVidia Quadro. However that doesn't guarantee they work with
anything else. Support is completely driver dependent, so its
up to NVidia/ATI/Intel which cards support it with which OS release.

We'll see. On OS/X lack of beampos queries is not that much
of a problem, you only lose a little bit of accuracy: PTB uses
timestamped hardware interrupts (vbl interrupts) on OS/X to
get pretty ok timestamps if it can't use beampos queries.

Order of accuracy/robustness:

1. Beampositin queries are best - as good as +/- 20 microsecs jitter
on some hardware/OS.

2. VBL interrupts on OS/X can be as good as +/-100 microsecs, but
they are always submillisecond accurate at least.

3. Standard timestamps are sub-millisecond on OS/X and Linux
most of the time, but its not guaranteed. On Windoze, they are
(nearly) guaranteed to be worse than 1 msec - pick an arbitrarily
high number as upper bound for the worst case.

-mario

--- In psychtoolbox@yahoogroups.com, "Peter Meilstrup" <peter.meilstrup@...> wrote:
>
> Does this mean the beamposition queries on Intel are working now? Will it
> also work on ATI graphics hardware? This will eliminate one of my hewadaches
> if so.
>
> On 10/30/07, aseitz <aseitz@...> wrote:
> >
> >
> > PTB-Info: Measured monitor refresh interval from beamposition = 16.742675ms
> > [59.727612 Hz].
> > PTB-Info: Will use beamposition query for accurate Flip time stamping.
> > PTB-Info: Measured monitor refresh interval from VBLsync = 16.750103 ms [
> > 59.701124
> > Hz]. (50 valid samples taken, stddev=0.065576 ms.)
> > PTB-Info: Small deviations between reported values are normal and no
> > reason to worry.
> >
> >
>