Debug: O (Output)
Page updated January 21, 2005
Sends the value of a byte to an output port.
Syntax
o PortByteValue
Parameters
Port
Required. Specifies the output port by address.
The port address can be a 16-bit value.
ByteValue
Required. Specifies the byte value you want to
direct to Port.
?
Displays a list of debug subcommands.
Remarks
- Windows XP and the Windows Server 2003 family of products do not use this command. It is included only to preserve compatibility with existing MS-DOS files, but it has no effect at the command line because the functionality is automatic.
- For information about reading the value of a byte from an input port by using i (input) subcommand, see Related Topics.
Examples
To send the byte value 4Fh to the output port at address
2F8h, type:
o2f8 4f
Formatting legend
| Format | Meaning |
| Italic | Information that the user must supply |
| Bold | Elements that the user must type exactly as shown |
| Ellipsis (...) | Parameter that can be repeated several times in a command line |
| Between brackets ([]) | Optional items |
| Between braces ({}); choices separated by pipe (|). Example: {even|odd} | Set of choices from which the user must choose only one |
| Courier font | Code or program output |
Some of these terms may be the same or similar to DOS commands. For information on DOS Commands, click here