User`s guide
Table Of Contents
- Contents
- Figures
- Tables
- Preface
- Introduction
- Getting Started
- 2.1 Overview
- 2.2 System Requirements
- 2.3 Configuring Your System
- 2.4 Updating the Debug Monitor Firmware
- 2.4.1 Updating Firmware in a Flash ROM
- 2.4.2 Updating the Flash ROM from the AlphaBIOS S...
- 2.4.3 Updating the Flash ROM from the Windows NT ...
- 2.4.4 Updating the Flash ROM from the Debug Monit...
- 2.4.5 Updating the Flash ROM from the Alpha SRM C...
- 2.4.6 Running Firmware Update
- 2.4.7 Updating Firmware in a UVPROM
- 2.5 Switching to the Debug Monitor Firmware on Fl...
- 2.6 Debug Monitor Memory Map
- 2.7 Downloading Files
- 2.8 Execution Commands
- 2.9 Resetting the Debug Monitor
- Remote Debugging
- User Commands
- 4.1 Overview
- 4.2 Using the Commands
- 4.3 User Commands Quick Reference
- 4.4 User Commands
- apropos
- arpshow
- bcoff
- bcon
- beep
- boot
- bootadr
- bootopt
- bpstat
- cb
- cfreg
- cl
- compare
- cont
- copy
- cq
- creg
- cw
- date
- delete
- dis
- dml
- dmq
- ebuff
- edevice
- edmp
- einit
- eml
- emq
- eprom
- ereg
- eshow
- estat
- estop
- fill
- flash
- flasherase
- flboot
- flcd
- flcopy
- fldir
- flload
- flread
- flsave
- flwrite
- fwupdate
- go
- help
- iack
- ident
- init
- jtopal
- ladebug
- load
- mces
- mcheck
- memtest
- mrb
- mrl
- mrw
- mwb
- mwl
- mww
- netboot
- netload
- next
- pb
- pcishow
- pfreg
- pl
- pq
- prb
- preg
- prl
- prw
- pw
- pwb
- pwl
- pww
- rabox
- rb
- rbcfg
- rbctl
- rbiu
- riccsr
- rl
- rmode
- romboot
- romlist
- romload
- romverify
- rsys
- rw
- sb
- setbaud
- setty
- sl
- sq
- step
- stop
- sum
- sw
- swpipl
- sysshow
- tip
- version
- wabox
- wb
- wbcfg
- wbctl
- wbiu
- wiccsr
- wl
- wrfen
- wsys
- ww
- Support, Products, and Documentation
- Index
User Commands 4–111
User Commands
prb
prb
The prb command reads a byte (8 bits) from the specified address in the PCI
configuration space.
Format
prb pci_address id bus function
Parameters
pci_address
Specifies the address in PCI space.
id
Specifies a decimal number that represents the slot assigned to the PCI device.
bus
Specifies which bus to read from. The default value is 0.
function
Specifies which function to read from. The default value is 0.
Description
The prb command reads a byte from the specified address in the PCI configuration
space for a device specified by the id. If the motherboard does not support PCI, then
this command is not implemented. If your system configuration supports multiple
PCI buses, use the parameters to specify the PCI device. Use the pcishow command
to view the available PCI devices.
Example
EB66> prb 0 19
86