Compaq Deskpro EP 6233 - E.2.1 Ati Rage IIC Graphics Controller; Figure E-3. Ati 3 D Rage IIC G

Technical Reference Guide
Compaq Personal Computers
Original - March 1998
E-3
VESA
Connector
HSync
Graphics
Data
Display
Monitor
Red
Green
Blue
E.2.1 ATI RAGE IIC GRAPHICS CONTROLLER
The ATI RAGE IIC graphics controller provides most of the functionality of the integrated
graphics subsystem and contains the features listed below:
♦
128-level command FIFO24-bit 200-MHz DAC
♦
2D accelerator with:
•
Hardware BitBLT, line draw, polygon fill, h/w cursor
•
MS DirectDraw support (double buffering, virtual sprites, transparent BitBLT
•
8-/16-/24-/32-bpp acceleration
•
24-bpp true color w/1 MB memory
♦
3D accelerator with:
•
Integrated 4-KB texture cache for improved large triangle performance
•
3D primitive support for points, lines, triangle, lists, strips, and quadrilaterals
•
Full screen/window double buffering
•
Hidden surface removal with 16-bit Z-buffering
•
Single pass bi- and tri-linear filtering support
•
Full Direct3D texture lighting support
•
Dithering support in 16-bpp for near-24-bpp quality in less memory
♦
VESA DDC1 and DDC2B support
♦
Video processor/accelerator supporting the following formats:
•
YCrCb 4:2:2
•
RGB 5-5-5
•
RGB 5-6-5
•
Cirrus AcciPak 91m)
♦
Power management for full VESA DPMS and EPA Energy Star compliance
Figure E-3 shows the basic architecture of the ATI 3D RAGE IIC controller, which is compatible
with software written for VGA, EGA, and CGA modes. Drivers are supplied for control of
graphics (GUI) accelerator engines used in extended VGA modes. The 3D RAGE IIC includes
multimedia support such as video overlay and DAC mode switching as well as VESA standard
feature connector (VSFC) baseline support. The 3D RAGE IIC accelerates video playback by
providing format conversion, interpolated x and y zooming, and color-space conversion for the
video display area (window).
Figure E–3
. ATI 3D RAGE IIC Graphics Controller Internal Architecture
3D RAGE IIC
Host
Bus
I/F
Drawing
Coprocessor
VGA
Controller
RAM
DAC
CRT
Controller
Memory
I/F
AD31..0
AGP Bus
VD7..0
VSync
Memory
Video
Processor