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
4–90 User Commands
User Commands
mrb
mrb
The mrb command reads a byte from memory in the register port in I/O address
space.
Format
mrb address [iterations [silent]]
Parameters
address
Specifies the address in memory I/O space.
iterations
Specifies how many times the data is read. The default is 1.
silent
Specifies whether or not the data is displayed. Setting this field to 1 causes the data
to be read but not displayed. The default is 0 (data is displayed).
Description
The mrb command displays the byte from the specified memory location in the
memory I/O space. For example, on the EB64, the byte is read from the ISA
extension slot.
Example
EB64> mrb d0000
FF