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參數(shù)資料
| 型號： | FW82815 |
| 英文描述： | Controller Miscellaneous - Datasheet Reference |
| 中文描述： | 控制器雜項-數(shù)據(jù)表參考 |
| 文件頁數(shù)： | 148/172頁 |
| 文件大小： | 795K |
| 代理商： | FW82815 |
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82815 GMCH
R
148
Datasheet
This multitexture support provides a superset of the “l(fā)egacy” one-texture (pre-DirectX 6) texture blend
modes and a large subset of the operations defined in DirectX 6 and the OpenGL ARB multitexture
extensions.
The Multitexture Compositing Unit is capable of combining the interpolated vertex diffuse color, a
constant color value, and up to two texels per pixel in a fully-programmable fashion. Up to three
operations (combinations) can be performed in a pipelined organization, with intermediate storage to
support complex equations (e.g., of the form “A*B + C*D) required for light maps and specular gloss
maps. Separate operations can be performed on color (RGB) and alpha components.
4.8.6.
2D Operation
The GMCH contains BLT and STRBLT functionality, a hardware cursor, and an extensive set of 2D
registers and instructions.
GMCH VGA Registers and Enhancements
The 2D registers are a combination of registers defined by IBM* when the Video Graphics Array (VGA)
was first introduced, and others that Intel has added to support graphics modes that have color depths,
resolutions, and hardware acceleration features that go beyond the original VGA standard. The GMCH
improves upon VGA by providing additional features that are used through numerous additional
registers.
The GMCH also supports an optional display cache. As an improvement on the VGA standard display
cache port-hole, the GMCH also maps the entire display cache into part of a single contiguous memory
space at a programmable location, providing what is called “l(fā)inear” access to the display cache. The size
of this memory can be up to 4 MB, and the base address is set via PCI configuration registers.
Alternatively, these buffers may be implemented in system memory (via D.V.M.), thus alleviating the
need for the display cache.
4.8.7.
Fixed Blitter (BLT) and Stretch Blitter (STRBLT) Engines
The GMCH‘s 64-bit BLT engine provides hardware acceleration for many common Windows*
operations. The following are two primary BLT functions: Fixed Blitter (BLT) and Stretch Blitter
(STRBLT). The term BLT refers to a block transfer of pixel data between memory locations. The word
“fixed” is used to differentiate from the Stretch BLT engine. The BLT engine can be used for the
following:
Move rectangular blocks of data between memory locations
Data alignment
Perform logical operations
The GMCH has instructions to invoke BLT and STRBLT operations, permitting software to set up
instruction buffers and use batch processing as described in the
3D/2D Instruction Processing
Section.
Note that these instructions replace the need to do PIO directly to BLT and STRBLT registers, which
speeds up the operation.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FW82815 S L5NQ | 制造商:Intel 功能描述:Graphics and Memory Controller Hub 544-Pin BGA |
| FW82815EM S L4MP | 制造商:Intel 功能描述:GRAPHICS AND MEMORY CONTROLLER HUB (GMCH2-M) |
| FW82815SL5NQ | 制造商:Intel 功能描述: |
| FW828201CA | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Controller Miscellaneous - Datasheet Reference |
| FW82840 S L3TA | 制造商:Intel 功能描述:Memory Controller Hub 544-Pin BGA |
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