C-28 Sun Blade 1500 Service, Diagnostics, and Troubleshooting Manual • December 2004
Note – The Sun XVR-1200 graphics accelerator provides two DVI video output
ports. Each DVI video port supports both analog (DVI-A) and digital (DVI-D) video
formats, however they cannot be used simultaneously from the individual DVI port.
C.6 System Clocks and Interrupts
C.6.1 Clock Generation
There are four clock domains in the Sun Blade 1500 workstation:
■ PECL — for UltraSPARC IIIi and JIO
■ Differential — from UltraSPARC IIIi to DDR memory subsystem
■ Single-ended PCI — for PCI devices
■ Miscellaneous clocks
The clocks in the four domains are generated from clock synthesizers or dedicated
crystals on the motherboard. The SDRAM clocks are generated by the UltraSPARC
IIIi processor.
1280 x 800 76 Hz Sun 16:10 4 1
1152 x 900 66, 76 Hz Sun 5:4 4 2
1152 x 900 120 Hz Sun-stereo 5:4 2 1
1024 x 800 84 Hz Sun 5:4 4 2
1024 x 768 75 Hz VESA 4:3 4 2
1024 x 768 60, 70, 77 Hz Sun 4:3 4 2
960 x 680 108, 112 Hz Sun-stereo Sun-Stereo 4 2
800 × 600 75 VESA 4:3 8 4
640 x 480 60 Hz VESA 4:3 16 8
1. Samples Per Pixel (SPP).
TABLE C-7 Sun XVR-1200 Graphics Accelerator Screen Resolutions (Continued)
Display
Resolution
Vertical
Refresh Rate
Sync
Standard
Aspect Ratio
Format
SPP
1
Single
Screen
SPP
1
Dual
Screen
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