Click above to get retro games delivered to your door ever month!

        Read from file with handle (INT 21h, 3Fh)

        Entry:
          AH = 3Fh
          BX = file handle
          CX = number of bytes to read
          DS:DX = address of buffer
        Return:
          CF = 1 if error
                  AX = Error Code
          CF = 0 successful
                  AX = number of bytes read