Agp Graphics Controllers; Matrox Millennium G200 Agp Graphics (Vei 8, Vli 8 And Vli 8Sf Pcs - HP Vectra VEi7 Technical Reference Manual

AGP Graphics Controllers

AGP Graphics Controllers
AGP technology was developed as a means of accessing system
memory as a viable alternative to augmenting the memory of the
graphics subsystem needed for high quality 3D graphics applications.
All the PCs covered in this manual support an AGP device (Matrox
MGA-G200, 8MB, not upgradeable, or SiS super AGP, 4MB upgradeable
to 8MB).
Matrox Millennium G200 AGP Graphics (VEi 8, VLi 8 and VLi 8SF
PCs)
The Matrox
independent 64-bit buses to allow faster management of data and
process graphics. The G200 graphics chip also provides full AGP 2X
optimization based on Symmetrical Rendering Architecture. This
enables faster data transfer rates and drawing engine access to both
frame buffer and system memory.
The Millennium G200 uses a high-speed 250 MHz RAMDAC to
eliminate screen flicker and produce crystal clear displays. Its 250 MHz
RAMDAC incorporates ultra-high bandwidth DAC for sharp display
images.
128-bit Dual Bus
The 128-bit DualBus uses two independent 64-bit buses that operate in
parallel inside the graphics engine to effectively double the raw
Architecture
performance of almost every operation. In addition, the 128-bit DualBus
architecture uses Dual Command Pipelining so that read and write
phases of two consecutive commands can be overlapped and executed
simultaneously.
This system allows very fast 2D performance even at the most
demanding resolutions and color depths. The 64-bit granularity of the
128-bit DualBus means that for frequent copying of small bitmaps and
fonts, performance is much higher than with a traditional 128-bit
architecture.
26
Core Components and Technologies
®
Millennium G200's 128-bit DualBus architecture uses two