GXM datasheet(120/244 Pages) NSC

부품명	GXM

상세설명	Geode??GXm Processor Integrated x86 Solution with MMX Support

PDF	244 Pages

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제조업체	NSC [National Semiconductor (TI)]

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120

Revision 3.1

Integrated Functions (Continued)

4.4

GRAPHICS PIPELINE

The graphics pipeline of the GXm processor includes a

BitBLT/vector engine which has been optimized for

Microsoft Windows. The hardware supports pattern gen-

eration, source expansion, pattern/source transparency,

and 256 ternary raster operations. The block diagram of

the graphics pipeline is shown in Figure 4-11.

4.4.1

BitBLT/Vector Engine

BLTs are initiated by writing to the GP_BLT_MODE regis-

ter, which specifies the type of source data (none, frame

buffer, or BLT buffer), the type of the destination data

(none, frame buffer, or BLT buffer), and a source expan-

sion flag.

Figure 4-11. Graphics Pipeline Block Diagram

Pattern

Hardware

Raster Operation

Output Aligner

PAT

SRC

DST

Internal Bus

Interface Unit

Graphics

Scratchpad RAM

BitBLT Buffers

and

Memory

X-Bus

C-Bus

Pipeline

BE = Byte Enable

PAT = Pattern Data

SRC = Source Data

DST = Destination Data

Output Aligner

Source

Expansion

Control Logic

DRAM Interface

Controller

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