Video Modes; Table A-40 Standard Vga Modes - Silicon Graphics 1450 Maintenance Manual

A: Technical Reference

Video Modes

138
Table A-39 (continued)
ISA Interrupt Description
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
The RAGE IIC chip supports all standard IBM® VGA modes. Table A-40 shows all the
modes that this implementation supports, including the number of colors, resolution,
and refresh rates.
Standard VGA Modes
Table A-40
Resolution Refresh Rate (Hz)
640x480 200
800x600 200
1024x768 150
1152x864 120
1280x1024 100
Interrupt Definitions
Colors
256
256
256
256
256
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