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
SROM Mini-Debugger Command Set 3–39
User Commands
qw
The quadword (qw) command enables or disables the quadword data flag.
Control Flags
Not applicable.
Description
The quadword command changes the state of the quadword data flag. When the
quadword data flag is enabled, all operations are performed on 64-bit data. When off,
only 32 bits of data are used.
The default state is off.
Example
In this example, the first bm command loads 32 bits of data using the ldl/p
instruction from addresses 3.FFF80000, 3.FFF80004, 3.FFF80008, and
3.FFF8000C. After quadword mode is enabled, the same command performs only
two 64-bit loads of data using the ldq/p instruction from addresses 3.FFF80000 and
3.FFF80008.
SROM> bm
A> 3fff80000
A> 3fff80010
00000003.fff80000: 5a5ac3c3
00000003.fff80004: a5a53c3c
00000003.fff80008: 00000038
00000003.fff8000c: 00006579
SROM> qw
QW ON
SROM> bm
A> 3fff80000
A> 3fff80010
00000003.fff80000: a5a53c3c.5a5ac3c3
00000003.fff80008: 00006579.00000038