OpenBoot 3.x Command Reference Manual

Appendix D Sun Ultra 5/10 UPA/PCI System

This appendix describes some information that is different in this PCI-bus-based system than in an Sbus-based Sun system.

PCI-Based System

The banner output is as follows, indicating that it is a PCI-based system by showing "UPA/PCI" in banner

ok banner
Sun Ultra 5/10 UPA/PCI (UltraSPARC-IIi 300MHz), Keyboard Present
OpenBoot 3.11, 32 MB memory installed, Serial #8812498.
Ethernet address 8:0:20:86:77:d2, Host ID: 808677d2.

Note that the output of show-devs command shows some PCI- based nodes. Also, PCI-based systems use generic names for devices. On-board network is named "network", and internal disks are named "diskn", n representing the scsi target number for that disk.

Plug in PCI cards with their own FCodePROM may or may not be using generic names. For details on generic names, see Recommended Practices available on homepage for Open Firmware Working Group at:

ok show-devs

The following shows the output of the devalias command on the Sun Ultra 5/10 UPA/PCI system:

ok devalias
screen                   /pci@1f,0/pci@1,1/SUNW,m64B@2
net                      /pci@1f,0/pci@1,1/network@1,1
cdrom                    /pci@1f,0/pci@1,1/ide@3/cdrom@2,0:f
disk                     /pci@1f,0/pci@1,1/ide@3/disk@0,0
disk3                    /pci@1f,0/pci@1,1/ide@3/disk@3,0
disk2                    /pci@1f,0/pci@1,1/ide@3/disk@2,0
disk1                    /pci@1f,0/pci@1,1/ide@3/disk@1,0
disk0                    /pci@1f,0/pci@1,1/ide@3/disk@0,0
ide                      /pci@1f,0/pci@1,1/ide@3
floppy                   /pci@1f,0/pci@1,1/ebus@1/fdthree
ttyb                     /pci@1f,0/pci@1,1/ebus@1/se:b
ttya                     /pci@1f,0/pci@1,1/ebus@1/se:a
keyboard!                /pci@1f,0/pci@1,1/ebus@1/su@14,3083f8:forcemode
keyboard                 /pci@1f,0/pci@1,1/ebus@1/su@14,3083f8
mouse                    /pci@1f,0/pci@1,1/ebus@1/su@14,3062f8
name                     aliases

The command .speed shows the speed for the processor and busses attached to the system:

ok .speed
CPU  Speed : 300.00MHz
UPA  Speed : 100.00MHz
PCI  Bus A : 33Mhz
PCI  Bus B : 33Mhz

pcia and pcib PCI Busses

The Sun Ultra 5/10 UPA/PCI system has two PCI busses, pcia & pcib. The probing of slots for those busses are controlled by the following two NVRAM configuration variables.

Table D-1 PCI Slots

Variable Name 

Default value 



1, 2, 3, 4 

Controls probe order of plug-in devices under pcia


1, 2, 3 

Controls probe order of plug-in devices under pcib