Serial Functions

  • chkch -- Checks to see if a character is ready to be received from the console serial port. If no character is available, a zero (0) is returned, otherwise the character is read and its value is passed back.
  • getchar -- Receives a single data byte from serial port.
  • putchar -- Sends a single data byte to serial port
  • serinit -- Initializes serial UART (8 data bits,no parity,1 stop bit)