CL-GD546X
Advance Product Bulletin
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
High-Performance
VisualMedia
™
Accelerators
CL-GD5462 (2D)
CL-GD5464 (3D)
CL-GD5465 (AGP)
OVERVIEW
The CL-GD546X is the Laguna
™
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
™
bus for easy expandability.
(cont.)
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)
(cont.)
System
Block Diagram
RDRAM
RDRAM
MPEG1/MPEG2
TV TUNER
TELECONFERENCE
(OPTIONAL)
V-Port™
PCI/AGP
5
4
3
CL-GD546X
208-PIN HQFP
2
1
0
RGB/DDC
RDRAM
RDRAM
September 1996
FEATURES/OVERVIEW
Laguna
™
Family VisualMedia
™
Accelerators
CL-GD546X
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
OVERVIEW
(cont.)
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.
s
Rambus
®
memory architecture
— Low-latency devices supported
— Single memory for color-buffer, Z-buffer, and texture
store
s
V-Port
™
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
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.
RDRAM
Memory Size
1 Mbyte
1 Mbyte
2 Mbyte
2 Mbyte
2 Mbyte
a
Screen Resolution
(Double-Buffered)
640
×
480
320
×
240
640
×
480
640
×
480
485
×
380
Color Depth
(Double-Buffered)
8 bpp
16 bpp
16 bpp
16 bpp
16 bpp
Z-Buffer
Host based
16 bit
16 bit
Host based
16 bit
Off-Screen
Texture Memory
a
>
350 Kbytes
> 450 Kbytes
>
150 Kbytes
>
600 Kbytes
>
800 Kbytes
Additional texture maps can be stored in system memory and accessed by the CL-GD5464 bus master capability.
CL-GD546X
Laguna
™
Family VisualMedia
™
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
Microsoft
®
Windows
®
Microsoft
®
DCI Provider
(display control interface)
Microsoft
®
Windows
®
95
Microsoft
®
DirectDraw
™
Resolution Supported
640
×
480, 800
×
600, 1024
×
768, 1280
×
1024, 1600
×
1200
640
×
480, 800
×
600, 1024
×
768, 1280
×
1024
640
×
480, 800
×
600, 1024
×
768
640
×
480, 800
×
600, 1024
×
768
640
×
480, 800
×
600, 1024
×
768, 1280
×
1024, 1600
×
1200
No. of Colors
256 (8 bit)
65,536 (16 bit)
16.8 Million (24 bit)
16.8 Million (32 bit)
CL-GD5464 only
256 (8 bit)
65,536 (16 bit)
16.8 Million (24 bit)
16.8 Million (32 bit)
256 (8 bit)
65,536 (16 bit)
16.8 Million (24 bit)
256 (8 bit)
65,536 (16 bit)
–
Microsoft
®
Windows
NT
™
640
×
480, 800
×
600, 1024
×
768, 1280
×
1024
640
×
480, 800
×
600, 1024
×
768
640
×
480, 800
×
600, 1024
×
768
AutoCAD
®
AutoShade
®
with
Renderman
™
3D Studio
™
MicroStation
®
OS/2
®
v3.
×
, Warp
VPM
(video port manager)
640
×
480, 800
×
600, 1024
×
768, 1280
×
1024, 1600
×
1200
640
×
480, 800
×
600, 1024
×
768, 1280
×
1024
640
×
480, 800
×
600, 1024
×
768
640
×
480, 800
×
600, 1024
×
768, 1280
×
1024
640
×
480, 800
×
600, 1024
×
768
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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