Technical Information 1-11
Table Section 1-6 Interrupt Level Assignments
Interrupt Priority
Interrupt Device
IRQ13
Coprocessor
IRQ14
Primary IDE
IRQ15
Secondary IDE
Integrated Graphics
The system has an SiS 6205 PCI local bus motion video playback controller and graphics
accelerator integrated on the system board. State of the art techniques are used for
optimizing performance in computer graphic intensive applications and graphical user
interfaces (GUI).
The integrated graphics controller integrates a motion video controller, a high-performance
GUI accelerator, 24-bit high frequency DAC and clock generator, VESA
®
-compliant
feature connector, and 1 MB of fast 64-bit DRAM (upgradeable to 2 MB).
Motion Video Controller
The motion video controller integrates a powerful Windows
®
GUI engine and unique
motion video playback hardware for superior performance. The graphics engine includes
an on-chip color space converter to accelerate decompression and a hardware scaler to
scale continuously from native size up to full screen at full speed. The graphics engine
delivers a full screen, smooth display of motion video data up to 30 frames per second
(fps). Support includes MPEG-1 (multimedia systems only) and Video for Windows.
MPEG is a compression/decompression standard developed by the Motion Picture Experts
Group. MPEG produces full-screen 30 fps, broadcast-quality digital video. The video
controller architecture maximizes the motion video performance and removes bandwidth
bottlenecks to display multimedia data at its full speed.
Graphics Accelerator
The graphics accelerator is specifically designed for graphics-intensive operations, text and
color pixel amplification, and scrolling. The graphics accelerator provides 64-bit, ultra-
high performance for demanding True Color, High Color, and pseudocolor GUI and CAD
applications.
The accelerator minimizes bus traffic by off-loading the tasks normally performed by the
processor. The dedicated bit-block transfers (BitBLT) engine maximizes performance by
speeding the movement of large blocks of image data in video memory.
