mov dl, OutputChar ;character to print
mov ah, 05h ;Print Character
int 21h
Print Character (Function 05h) sends a character to the standard printer device.
This function has been superseded by Write File or Device (Function 40h).
OutputChar
Specifies the ASCII value of the character to be printed.
This function has no return value.
If the printer device is busy, this function waits until the device is ready.
Function 40h Write File or Device