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112 SKA4 Baseboard Product Guide
Table 69. Interrupt Definitions (continued)
ISA Interrupt Description
IRQ5 Parallel port
IRQ6 Floppy disk
IRQ7 Parallel port
IRQ8_L Active low RTC interrupt
IRQ9
IRQ10
IRQ11
IRQ12 Mouse interrupt
IRQ14 Compatibility IDE interrupt from primary channel IDE devices 0 and 1
IRQ15 Reserved
SMI System Management Interrupt.
General purpose indicator is sourced by the OSB4 and
BMC to the processors
SCI
Video Modes
The RAGE IIC chip supports all standard IBM VGA modes. The following tables show all the
modes that this implementation supports, including the number of colors, resolution, and refresh
rates.
Table 70. Standard VGA Modes
Resolution Refresh Rate (Hz) Colors
640x480 200 256
800x600 200 256
1024x768 150 256
1152x864 120 256
1280x1024 100 256
1600x1200 76 256
640x480 200 65K
800x600 200 65K
1024x768 150 65K
1152x864 120 65K
1280x1024 100 65k
1600x1200 76 65k
640x480 200 16.7M
800x600 160 16.7M