Technical Information 1-11
Table 1-5 Interrupt Level Assignments
Interrupt Priority
Interrupt Device
IRQ00
Counter/Timer
IRQ01
Keyboard
IRQ02
Cascade (INT output from slave)
IRQ03
COM2 and COM4
IRQ04
COM1 and COM3
IRQ05
Parallel Port 2/Audio (if present)
IRQ06
Diskette Drive Controller
IRQ07
Parallel Port 1
IRQ08
Real-time clock
IRQ09
Audio (if present)
IRQ10
Available
IRQ11
Matrox Video Controller
IRQ12
PS/2 mouse
IRQ13
Coprocessor
IRQ14
Primary IDE
IRQ15
Secondary IDE
Graphics Subsystem
The system unit has a Matrox MGA Millennium motion video controller and graphics
accelerator integrated on the video board. The video board plugs into the PCI backplane.
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 2 MB of fast 64-bit WRAM (expandable using optional upgrade
modules).
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 and Video for Windows
®
.
