I can not put a char 0x00 to serial window

I can not put a char 0x00 to serial window.How can I do?
I can not put a char 0x00 to serial window

I can not put a char 0x00 to serial window.How can I do?
Comparison "Greater and Less than"

Hello!!! I program with the A51 assembler! I would like to know if I can find somewehre comparison subroutines "Greater and Less than" Any help would be appreciate Thank you in advance !...
Comparison "Greater and Less than"

Hello!!! I program with the A51 assembler! I would like to know if I can find somewehre comparison subroutines "Greater and Less than" Any help would be appreciate Thank you in advance !...
Initializing Port 0 and Port 2 with 0x00 value

The hardware that I am working on has Relays connected on Port 0 and Port 2 pins of AT89S52 uc. I would like to know if it is possible to initialize the port pins with 0x00 values before the main application...