Sun Microsystems Ultra 5, Service Manual

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Appendix C Functional Description C-9
FIGURE C-6
Supported Ultra 5 Configuration (With Secondary Hard Drive)
C.1.2.8 PCI-Based Graphics
The system has an on-board PCI-based graphics controller. The graphics controller
uses either 2-Mbytes SGRAM or 4-Mbytes SGRAM as the graphics memory. The on-
board graphics connector is a standard DB15 VGA connector. The PGX graphics
controller provides 8-bit graphics with 2-Mbytes SGRAM. The PGX24 graphic
controller provides 24-bit graphics with 4-Mbytes SGRAM.
The following two figures show a functional block diagram of the PGX and the
PGX24 PCI-based graphics.
FIGURE C-7
PCI-Based Graphics Functional Block Diagram (PGX)
CD-ROM
connector
Device 2
CD-ROM drive
Secondary hard drive Motherboard J15
(primary channel)
Primary hard drive
(master-device 0)
(slave-device 1)
DB15
2-Mbyte
SGRAM EMI
filters
PCI-B Bus
PGX graphics
controller
(ATI Rage II+DVD)