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CTRL+A (Toggle Baud Rate)

  • Cikk

The CTRL+A key toggles the baud rate used in the kernel debugging connection.

KD Syntax

CTRL+A  ENTER

WinDbg Syntax

CTRL+ALT+A

Environment

Debuggers

KD and WinDbg only

Modes

kernel mode only

Targets

live debugging only

Platforms

all

Remarks

This will cycle through all available baud rates for the kernel debugging connection.

Supported baud rates are 19200, 38400, 57600, and 115200. Each time this control key is used, the next baud rate will be selected. If the baud rate is already at 115200, it will be reduced to 19200.

In WinDbg, this can also be accomplished by selecting Debug | Kernel Connection | Cycle Baud Rate.

You cannot actually use this control key to change the baud rate at which you are debugging. The baud rate of the host computer and the target computer must match, and the baud rate of the target computer cannot be changed without rebooting. Therefore, you only need to toggle through the baud rates if the two computers are attempting to communicate at different rates. In this case, you must change the host computer's baud rate to match that of the target computer.