I am trying to input a character or string in the debugger serial input window using characters greater than 0x7F.

Keil's website says the following :

"The SIN, SIN0, and SIN1 VTRegs represent the inputs to the on-chip serial port of the MCU.

So, if you have configured a serial port, the following commands (typed in the debugger's Command Window) input a value into the serial stream. Note that you may also use the Serial Window in the uVision2 Debugger to input characters for the serial port.

SIN = 'A' /* Input the letter A into the serial stream */
SIN1 = 0x019E /* Input the 9-bit value 19Ex into the serial stream */

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I have used these commands, but they don't seem to work. Anyone can help me out here?