Introduction - If you have any usage issues, please Google them yourself
Serial I/O Routines Using the 8051 s Built-In UART
This 8051 code library is intended to provide a variety of commonly used I/O functions found in high-level languages to 8051 assembly language programs. All I/O is assumed to be though the 8051 s built-in UART, connected to a terminal or terminal emulation program running on a PC or workstation.