Intel D845GVFN Product Specification - Page 25

Dynamic Video Memory Technology DVMT, 8.1.2, Zone Rendering Technology ZRT - video driver

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Product Description Table 9 describes the bpp configuration mode values referenced in Table 8. In Table 9, assume that for each configuration mode number, the features of all lower numbers are also supported. For example, if the supported configuration mode is 4, then modes 1 through 3 are also supported. DVD consists of both the overlay engine as well as the MPEG decoding; both are necessary for DVD playback. Table 9. Details of bpp Configuration Modes Configuration Mode Number Description 6 32 bpp (16 M colors) with DVD (Overlay + MPEG decode) On 5 16 bpp (64 K colors) with DVD On 4 32 bpp (16 M colors) with DVD Off 3 16 bpp (64 K colors) with DVD Off 2 8 bpp (256 colors) with DVD On 1 8 bpp (256 colors) with DVD off For information about Obtaining graphics software and utilities Refer to Section 1.3, page 14 1.8.1.1 Dynamic Video Memory Technology (DVMT) DVMT enables enhanced graphics and memory performance through Direct AGP, and highly efficient memory utilization. DVMT ensures the most efficient use of available system memory (up to 64 MB) for maximum 2-D/3-D graphics performance. DVMT uses a portion of system physical memory (as set in the BIOS Setup program) for compatibility with legacy applications. An example of this would be when using VGA graphics under DOS. Once loaded, the operating system and graphics drivers allocate the buffers needed for performing graphics functions. NOTE The use of DVMT requires operating system driver support. For information about Obtaining the DVMT white paper Refer to http://developer.intel.com/design/chipsets/845gv/ 1.8.1.2 Zone Rendering Technology (ZRT) The Intel Extreme Graphics Controller supports Zone Rendering Technology (ZRT). ZRT is a process by which the screen is divided into several zones. Each zone is completely cached and rendered on chip before being written to the frame buffer. The benefits of ZRT include the following: • Increased memory efficiency via better localization of data • Increased on-chip processing speed due to decreased wait time for data • Increased effective pixel fill rates 25

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Product Description
25
Table 9 describes the bpp configuration mode values referenced in Table 8.
In Table 9, assume that
for each configuration mode number, the features of all lower numbers are also supported.
For
example, if the supported configuration mode is 4, then modes 1 through 3 are also supported.
DVD consists of both the overlay engine as well as the MPEG decoding; both are necessary for
DVD playback.
Table 9.
Details of bpp Configuration Modes
Configuration Mode Number
Description
6
32 bpp (16 M colors) with DVD (Overlay + MPEG decode) On
5
16 bpp (64 K colors) with DVD On
4
32 bpp (16 M colors) with DVD Off
3
16 bpp (64 K colors) with DVD Off
2
8 bpp (256 colors) with DVD On
1
8 bpp (256 colors) with DVD off
For information about
Refer to
Obtaining graphics software and utilities
Section 1.3, page 14
1.8.1.1
Dynamic Video Memory Technology (DVMT)
DVMT enables enhanced graphics and memory performance through Direct AGP, and highly
efficient memory utilization.
DVMT ensures the most efficient use of available system memory
(up to 64 MB) for maximum 2-D/3-D graphics performance.
DVMT uses a portion of system physical memory (as set in the BIOS Setup program) for
compatibility with legacy applications.
An example of this would be when using VGA graphics
under DOS.
Once loaded, the operating system and graphics drivers allocate the buffers needed for
performing graphics functions.
±
NOTE
The use of DVMT requires operating system driver support.
For information about
Refer to
Obtaining the DVMT white paper
1.8.1.2
Zone Rendering Technology (ZRT)
The Intel Extreme Graphics Controller supports Zone Rendering Technology (ZRT).
ZRT is a
process by which the screen is divided into several zones.
Each zone is completely cached and
rendered on chip before being written to the frame buffer.
The benefits of ZRT include the
following:
•
Increased memory efficiency via better localization of data
•
Increased on-chip processing speed due to decreased wait time for data
•
Increased effective pixel fill rates