I can not put a char 0x00 to serial window

How are you trying to do it?
What happens?

What do you expect to happen?

How are you trying to do it?
What happens?

What do you expect to happen?

In debug sesson, and view serial window#1, in this window, use ALT+1
will put a char (0x01) into sbuf,use ALT+2 will put a char (0x02) into sbuf.... but use ALT+0 will not put a
char (0x00) into sbuf.

try:

SBUF=0

sbuf=0 ,it is put a char to serial port,but I want my program get a char (0x00).

What if you use the dialogue on the 'Peripherals' menu:
Set SBUF to 0, then set the Rx interrupt?

Take a look at SIN and SOUT VTRegs. If you enter SIN=0 in the CommandWindow, this simulates receiving an ASCII 0x00.

Jon

Thanks!