Sun Microsystems 60 service manual System Unit

C.1 System Unit

The system unit is an UltraSPARC port architecture (UPA)-based multiprocessor machine that uses peripheral component interconnect (PCI) as the I/O bus.

The CPU modules, PSYCHO+ ASIC (UPA-to-PCI bridge), and UPA graphics cards communicate with each other using the UPA protocol. The CPU modules and the PSYCHO+ ASIC are UPA master-slave devices. The UPA graphics cards are UPA slave-only devices.

The Marvin ASIC routes UPA requests packets through the UPA address bus and controls the flow of data using the XB9+ ASIC. See FIGURE C-1.

■UPA Interconnect—pageC-4

■PCI Bus—pageC-6

■UltraSPARC II Processor—page C-8

■Memory System—page C-9

■Graphics and Imaging—page C-14

■Peripherals—pageC-15

■Other RMA Storage Device X-Options—page C-19

■Keyboard and Mouse, Diskette, and Parallel Port—pageC-19

■Serial Port—pageC-22

■Ethernet—page C-24

■Audio Card and Connector—pageC-28

■SCSI—pageC-30

■ASICs—page C-33

■SuperIO—page C-36

C-2Sun Ultra 60 Service Manual • August 2001