SourcePoint AMD Help

Using Help
- Welcome to On-Line Help
- How To - HTML Help
Contacting ASSET InterTech
- Contacting ASSET InterTech
Introduction to SourcePoint
- What's New in SourcePoint for AMD 1.0
SourcePoint Environment
- SourcePoint Overview
- How To -- SourcePoint Environment
Breakpoints Window
- Breakpoints Window Overview
- How To - Breakpoints
  - Set Breakpoints From Other SourcePoint Windows
Code Window
- Code Window Overview
- How To - Code Window
Command Window
- Command Window Overview
  - Introduction
Confidence Tests Window
- Confidence Tests Window Overview
Descriptors Tables Window
- Descriptors Tables Window Overview
  - Descriptors Window Introduction
  - Descriptors Window Menu
- How To - Descriptors
  - Replace a Descriptor Entry
Devices Window
- Devices Window Overview
- How To - Devices Window
  - Create Simple Devices Window
Log Window
- Log Window Overview
Memory Window
- Memory Window Overview
- How To - Memory Window
Page Translation Window
- Page Translation Windows Overview
  - Page Translation Windows Introduction
PCI Devices Window
- PCI Devices Window Overview
  - PCI Devices Window Introduction
  - PCI Devices Window Menu
- How To - PCI Devices Window
  - Open the Registers Window From the PCI Devices Window
  - Refresh a PCI Devices Dialog Box
Registers Window
- Registers Window Overview
  - Registers Window Introduction
- How To - Registers
  - Customize the Registers Window
  - Print a Register List
Symbols Windows
- Symbols Window Overview
- How To - Symbols Window
  - Change Values in the Symbols Window
Viewpoint Window
- Viewpoint Window Overview
  - Viewpoint Window Introduction
  - Viewpoint Window Menu
Watch Window
- Watch Window Overview
  - Watch Window Introduction
  - Watch Window Menu
- How To - Watch Window
  - Add and Expand Registers in a Watch View
  - Add Symbols to a Watch or Quick Watch View
Technical Notes
- Descriptor Cache: Revealing Hidden Registers
- UEFI Framework Debugging
- Memory Casting
- Microsoft PE Format Support in SourcePoint
- Registers Keyword Table
- SourcePoint Licensing
- Stepping
- Symbols Textsym Format
- Target Configuration
- Using Bookmarks
- Which Processor Is Which
SourcePoint Command Language
- Overview
- Commands and Control Variables

dport

Display or change the contents of a 32-bit I/O port.

Syntax

[result =] [[px]] dport(io-addr) [= expr]

Where:

result	specifies an debug variable of type ord4 to which the function return value is assigned. If result is not specified, the return value is displayed on the next line of the screen.
[px]	is the viewpoint override, including punctuation ( [ ] ), specifying that the viewpoint is temporarily set to processor x of the boundary scan chain. The processor can be specified as px (where x is the processor ID), or an alias you have defined for a given processor ID. ALL cannot be used as a viewpoint override.
io-addr	specifies a 16-bit address in the processor I/O space. The available io-addr range is 0 to 0ffffh. Parentheses are optional.
expr	specifies a 32-bit number or expression. Using this option writes the data to the specified I/O port.

Discussion:

Use the dport command to read from and write to the specified I/O port with the specified 32-bit data.

Example 1

To assign a 32-bit value to a port and assign one port value to another:

Command input:

dport 88h = 87654321h
dport 90h = dport 88h

Example 2

To create a debug variable named portvar and assign a port value to it:

Command input:

define ord4 portvar
portvar = dport 90 ; portvar

Result:

FFFFFFFFH