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B4.1.5 Display Adapters/Chipsets - FAQs
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| bet | 100/188 | | Sana | 21.03.2017 | | Hajmi | 0.89 Mb. | | #429 |
B4.1.5 Display Adapters/Chipsets - FAQs
See http://www.microsoft.com/winlogo/hardware/.
B4.1.5.2 – Updated at B4.1.4.6.8 B4.1.5.3 See A3.4.4.7.5 B4.1.5.4 – DELETED B4.1.5.5 – DELETED B4.1.5.6 - Updated at B4.1.4.8 B4.1.5.7 – Updated at B4.1.4.1
Announcement of additional future requirements will be published at http://www.microsoft.com/winlogo/hardware/.
B4.1.R.1 TV output capability, if present, meets requirements B4.1.4.R.1 Adapter supports underscan scaling.
If TV out is implemented, adapter supports overscan/underscan scaling. The television output adapter must be able to correct horizontal and vertical overscan/underscan using hardware scaling. Software must be able to disable and enable this feature.
B4.1.4.R.2 Adapter supports flicker filter and is required to take a 1024 x 768 32-bpp input and downscale it to TV-out resolution.
If TV out is implemented, the television output adapter must use multiline (three-tap minimum) hardware filtering techniques for flicker reduction. Enable, disable, and adjust capabilities for the flicker filter must be software controllable.
The TV out capability must be able to accept up to a 1024 × 768 progressive desktop and convert it to an interlaced TV resolution output signal.
B4.1.4.R.3 Adapter with TV output supports both 1024 x 768 at 32 bpp VGA and TV output simultaneously.
If TV out is implemented, adapter also supports DVI or VGA and television output. A graphics adapter that supports TV out must also support either DVI or VGA or both. This requirement does not apply to systems with integrated displays. The usefulness of a system is greatly enhanced when any combination of outputs can be active concurrently, but concurrent output support is not required.
B4.1.4.R.4 Software supports positioning.
If TV out is implemented, software must be able to program the television output hardware to position the television image in increments of 4 pixels horizontally and 4 scan lines vertically (or finer). The supported range must be at least +/– 40 pixels horizontal and +/– 20 scan lines vertical.
B4.1.R.2 Adapter defaults to noninterlaced refresh rate if interlace modes are selected.
Support for interlaced display modes is not required. However, if interlaced modes are implemented and the user selects 1024 × 768 resolution, the graphics adapter must default to a noninterlaced refresh rate with the following exceptions:
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The attached monitor is not compatible with Display Data Channel (DDC) and the user has not selected a monitor type in the display control panel.
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The monitor does not support 1024 × 768 non-interlaced mode, as determined from the Extended Display Identification Data (EDID) or monitor registry settings.
For a DTV-enabled PC, the scaling engine must be able to accept an input with a rate of 720p60 (1280 horizontal pixels) and 540p60 (bobbed from 1080i) (1280 horizontal pixels).
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