Upa - Sun Microsystems Ultra 80 Service Manual

CPU
modules
0 and 1
U2P
ASIC
144

UPA

graphics
slots 1/2
UPA_D_DAT
72
33-MHz/32- or 64-bit PCI bus
PCI
Slot 4
PCI
slot 3
slot 2
10/100
Ethernet
PCI
66 1
FIGURE C-1
UPA_AD2
UPA_AD3
UPA_AD0
Control
UPA_DATA0
XB9++
UPA_E_DAT
ASIC
64
PCIO
ASIC
PHY
PCI
XCVR
Keyboard/mouse/parallel/diskette
System Functional Block Diagram
BANK_SEL
Memory address/control
QSC
ASIC
UPA_AD1
UPA_DATA1
144
Memory
CBT
data
Ntwk
576
BANK_SEL
QSC
ASIC
SCSI
controller
EBus2 EBus2
8 8
Audio
module
SuperIO
ASIC
NVRAM/
TOD
Audio
CBT
Ntwk
CPU
modules
2 and 3
Memory
Memory
data
287
Memory
data
287
RISC
Clock control
ASIC
SCSI bus
(External)
SCSI bus
(Internal)
Serial
ports
1-Mbyte
Flash
PROM
Serial
Ports
Appendix -3