Video Modes; Table 4-24 Standard Vga Modes - Silicon Graphics 1400 Server Family Maintenance And Upgrade Manual

Chapter 4: Technical Reference

Video Modes

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Table 4-23 (continued)
Interrupt I/O APIC level
IRQ12 INT12
INT13
IRQ14 INT14
IRQ15 INT15
SMI_L
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.
Table 4-24 Standard VGA Modes
Mode(s) Bits per Colors (no per
in Hex pixel palette size)
0, 1 4 16/256K
2, 3 4 16/256K
4, 5 4 4/256K
6 4 2/256K
7 4 Mono
D 4 16/256K
E 4 16/256K
F 4 Mono
Interrupt I/O Descriptions
Description
Mouse interrupt
Compatibility IDE interrupt from primary channel IDE
devices 0 and 1
System management interrupt—general purpose
indicator sourced by the PIIX4E and BMC through the
PID to the processors
Resolution
360 X 400
720 X 400
320 X 200
640 X 200
720 X 400
320 X 200
640 X 200
640 X 350
Pixel Freq. Horizontal
(MHz) Freq. (kHz)
14 31.5
28 31.5
12.5 31.5
25 31.5
28 31.5
12.5 31.5
25 31.5
25 31.5
Vertical Freq.
(Hz)
70
70
70
70
70
70
70
70