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C-2 Sun Ultra 60 Service Manual • August 2001

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—page C-4

■ PCI Bus—page C-6

■ UltraSPARC II Processor—page C-8

■ Memory System—page C-9

■ Graphics and Imaging—page C-14

■ Peripherals—page C-15

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

■ Keyboard and Mouse, Diskette, and Parallel Port—page C-19

■ Serial Port—page C-22

■ Ethernet—page C-24

■ Audio Card and Connector—page C-28

■ SCSI—page C-30

■ ASICs—page C-33

■ SuperIO—page C-36

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WatchNet RTS series Wartungshandbuch Seite 200