Silicon Graphics 1400, Руководство по обслуживанию и модернизации

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Chapter 4: Technical Reference
Video Modes
The CL-GD5480 integrated video controller provides all standard IBM VGA modes. With
2 MB of SGRAM standard, the system supports special Cirrus Logic extended modes.
Table 4-24 and Table 4-25 list the standard and extended modes that this implementation
supports, including the number of colors and palette size (e.g., 16 colors out of 256 K
colors), resolution, pixel frequency, and scan frequencies.
IRQ12 INT12 Mouse interrupt
INT13
IRQ14 INT14 Compatibility IDE interrupt from primary channel IDE
devices 0 and 1
IRQ15 INT15
SMI_L System management interrupt—general purpose
indicator sourced by the PIIX4E and BMC through the
PID to the processors
Table 4-24 Standard VGA Modes
Mode(s)
in Hex Bits per
pixel Colors (no per
palette size) Resolution Pixel Freq.
(MHz) Horizontal
Freq. (kHz) Vertical Freq.
(Hz)
0, 1 4 16/256K 360 X 400 14 31.5 70
2, 3 4 16/256K 720 X 400 28 31.5 70
4, 5 4 4/256K 320 X 200 12.5 31.5 70
6 4 2/256K 640 X 200 25 31.5 70
7 4 Mono 720 X 400 28 31.5 70
D 4 16/256K 320 X 200 12.5 31.5 70
E 4 16/256K 640 X 200 25 31.5 70
F 4 Mono 640 X 350 25 31.5 70
Table 4-23 (continued) Interrupt I/O Descriptions
Interrupt I/O APIC level Description