User`s guide
Table Of Contents
- Contents
- Tables
- Preface
- Introduction
- Getting Started
- 2.1 Overview
- 2.2 Hardware Required
- 2.3 Hardware Debug Features
- 2.4 Setting Up the SROM Serial Port Connection
- 2.5 Starting and Running the Mini-Debugger
- 2.6 Sample Session on the EB64
- 2.7 Sample Session on the EB64+ and the AlphaPC 6...
- 2.8 Sample Session on the EB66 and EB66+
- 2.9 Sample Session on the EB164
- 2.10 Sample Session on the AlphaPC 164
- 2.11 Sample Session on the AlphaPC 164LX
- 2.12 Onboard Machine Check Handler
- SROM Mini-Debugger Command Set
- Support, Products, and Documentation
- Index
3–44 SROM Mini-Debugger Command Set
User Commands
wa
The write address (wa) command enables or disables the write address flag.
Control Flags
!d (negate data flag)
Description
When the write address flag is enabled, write operations use the destination address
as their data. This allows for unique values to be written to individual locations (a
useful feature when debugging the memory subsystem). If the negate data flag is
enabled, the one’s complement of the address being written is used instead.
Commands that request data to be written will not do so if this flag is enabled.
The default state is off; data used by deposit commands is provided by the user.
Example
In the following example, after enabling the write address flag, the region between
400000 and 400020 is filled with its own address in 32-bit increments. With qw
mode on, deposits are performed in quadword increments, and the data written
changes in 64-bit increments.
SROM> wa
Wrt Addr ON
SROM> fm
A> 400000
A> 400020