RS232

 MOVLW 0x40
 MOVWF __pcstackCOMMON
 MOVLW 0x0
 MOVWF 0x71
 MOVLW 0x2C
 BCF PCLATH, 0x4
 BCF PCLATH, 0x3
 CALL 0x7B7
 BCF PCLATH, 0x4
 BCF PCLATH, 0x3
 MOVLW 0x41
 BCF PCLATH, 0x4
 BCF PCLATH, 0x3
 CALL 0x798
 BCF PCLATH, 0x4
 BCF PCLATH, 0x3