CL-GD546X
Advance Product Bulletin
September 1996
FEATURES
s
64-bit graphics engine with integrated 3D game
acceleration (CL-GD5464)
-- Perspective textures mapping
-- Bilinear/trilinear filtering
-- Mip mapping
-- Lit, copy, decal, and blend textures
-- Texture decompression
-- Mono rasterization (single-pass lighting)
-- Stippling
-- Polygon, line, and point drawing
-- 16-bit Z-buffer
-- Gouraud shading
-- Alpha blending, fog, and transparency
-- Display list processing for maximum performance
-- Hardware page flipping
-- Sub-pixel accuracy
s
High-performance 64-bit GUI accelerator
-- Three-operand BitBLT (bit block transfer)
-- Color expansion for 8-, 16-, 24-, and 32-bpp modes
-- Stretch BLT
s
PCI 2.1-compliant bus master (CL-GD5464)
-- DMA maximizes system performance
-- Host-rendered/cached texture maps
s
AGP (accelerated graphics port) support
(CL-GD5465)
MPEG1/MPEG2
TV TUNER
RDRAM
RDRAM
PCI/A
GP
RGB/DDC
RDRAM
RDRAM
0
1
2
3
4
5
208-PIN HQFP
CL-GD546X
V-Port
TM
System
Block Diagram
TELECONFERENCE
(OPTIONAL)
OVERVIEW
The CL-GD546X is the Laguna
TM
family of pin-com-
patible, Rambus
-based 2D/3D graphics accelera-
tors. The CL-GD5462, the first family member,
provides multi-window video and graphics accelera-
tion with greater-than-VRAM performance at lower-
than-VRAM cost. The follow-on product, the
CL-GD5464, offers 3D graphics capability in addi-
tion to maintaining the same high level of 2D perfor-
mance offered by the CL-GD5462.
The 64-bit graphics engine of the CL-GD546X fea-
tures standard GUI acceleration hardware as well as
advanced features such as stretch BLT and video
playback scaling. Color-key and chroma-key opera-
tions are supported to enable graphics and video to
b e c o m b i n e d i n a n e f fi c i e n t m a n n e r. T h e
CL-GD546X integrates a 24-bpp palette DAC, clock
generators, a full-feature VGA controller, and
V-Port
TM
bus for easy expandability.
(cont.)
(cont.)
High-Performance
VisualMedia
TM
Accelerators
CL-GD5462 (2D)
CL-GD5464 (3D)
CL-GD5465 (AGP)
CL-GD546X
Laguna
TM
Family VisualMedia
TM
Accelerators
Based on the CL-GD5462, the CL-GD5464 incorpo-
rates a 3D module, PCI bus mastering, and a newer,
230-MHz DAC. The CL-GD5464 offers very cost-
effective hardware acceleration for the latest gener-
ation of 3D games that rely heavily on texture map-
ping to achieve a dramatic experience for the end
user. The rendering performance is tuned to
Microsoft's Direct3D game API. The CL-GD5464 is
also compatible with many other 3D game APIs on
the market.
The CL-GD5464 operates as a PCI bus master for
maximum system throughput. Use of the PCI bus
master reduces the system cost by optionally storing
texture maps, Z-buffer, and display list instructions
for 3D operation in system memory.
The CL-GD5465 also supports Intel's AGP (acceler-
ated graphics port) for higher bandwidth between
the system memory and the graphics subsystem.
Both the CL-GD5462 and CL-GD5464 are one-
channel devices with bandwidth up to 600 Mbytes
per second. While maintaining the same pin layout,
future Laguna family members will use two Rambus
channels to increase the bandwidth to 1.2 Gbytes
per second.
FEATURES
(cont.)
s
Video playback acceleration
-- Single-pass X, Y interpolated scaling
-- Hardware occlusion for three video windows
-- YUV-to-RGB conversion
-- Color and chroma key
s
Rambus
memory architecture
-- Low-latency devices supported
-- Single memory for color-buffer, Z-buffer, and texture
store
s
V-Port
TM
for peripheral expansion
-- MPEG decoder
-- TV tuner
-- Teleconferencing
s
Integrated VGA controller
s
Integrated 230-MHz palette DAC and clock synthe-
sizer (CL-GD5462 is 170 MHz)
-- Supports resolutions up to 1600
1200 at 85 Hz
-- True-color operation up to 1024
768
-- Hardware cursor
s
DDC (display data channel) level 2B-compliant
monitor signaling
s
`Green PC' power-saving features support
-- DPMS (display power management signaling)
-- System power-down
OVERVIEW
(cont.)
FEATURES/OVERVIEW
3D GRAPHICS AND VIDEO MODES (CL-GD5464)
The following table shows some of the video data formats associated with each of the graphics display
modes for the CL-GD5464.
a
Additional texture maps can be stored in system memory and accessed by the CL-GD5464 bus master capability.
RDRAM
Memory Size
Screen Resolution
(Double-Buffered)
Color Depth
(Double-Buffered)
Z-Buffer
Off-Screen
Texture Memory
a
1 Mbyte
640
480
8 bpp
Host based
>
350 Kbytes
1 Mbyte
320
240
16 bpp
16 bit
> 450 Kbytes
2 Mbyte
640
480
16 bpp
16 bit
>
150 Kbytes
2 Mbyte
640
480
16 bpp
Host based
>
600 Kbytes
2 Mbyte
485
380
16 bpp
16 bit
>
800 Kbytes
CL-GD546X
Laguna
TM
Family VisualMedia
TM
Accelerators
SOFTWARE DRIVERS SUPPORT
Cirrus Logic provides an extensive and expanding range of software drivers to enhance the resolution and
performance of many software packages. The following table lists the Cirrus Logic software drivers for the
CL-GD546X. The CL-GD5464 is a software superset of the CL-GD5462.
Software Drivers
Resolution Supported
No. of Colors
Microsoft
Windows
Microsoft
DCI Provider
(display control interface)
Microsoft
Windows
95
Microsoft
DirectDraw
TM
640
480, 800
600, 1024
768, 1280
1024, 1600
1200
256 (8 bit)
640
480, 800
600, 1024
768, 1280
1024
65,536 (16 bit)
640
480, 800
600, 1024
768
16.8 Million (24 bit)
640
480, 800
600, 1024
768
16.8 Million (32 bit)
CL-GD5464 only
Microsoft
Windows NT
TM
640
480, 800
600, 1024
768, 1280
1024, 1600
1200
256 (8 bit)
640
480, 800
600, 1024
768, 1280
1024
65,536 (16 bit)
640
480, 800
600, 1024
768
16.8 Million (24 bit)
640
480, 800
600, 1024
768
16.8 Million (32 bit)
AutoCAD
AutoShade
with
Renderman
TM
3D Studio
TM
MicroStation
640
480, 800
600, 1024
768, 1280
1024, 1600
1200
256 (8 bit)
640
480, 800
600, 1024
768, 1280
1024
65,536 (16 bit)
640
480, 800
600, 1024
768
16.8 Million (24 bit)
OS/2
v3.
, Warp
640
480, 800
600, 1024
768, 1280
1024
256 (8 bit)
640
480, 800
600, 1024
768
65,536 (16 bit)
VPM
(video port manager)
Resolution-independent
BIOS SUPPORT
s
Fully IBM
VGA-compatible BIOS
s
VBE (VESA
BIOS Extension) v2.0 support
s
PCI support
s
DPMS and DDC2B support in ROM
s
Plug-and-play support
UTILITIES
s
Manufacturing test
s
Video-mode configuration utility: CLMODE
s
Configured OEM system integration: OEMSI
s
Resolution switching utility: WINMODE
s
RAMBIOS utility
s
Screen centering utility
s
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