Which chip do i use?

[mister_e]

if you don't use any HSERIN/HSEROUT you use the second methode, unless you use the DEFINE method.

this one work here

        @   __CONFIG _HS_OSC & _LVP_OFF
        DEFINE OSC 20
        
        PORTB=0
        TRISB = %00000010
        RCSTA = $90 ' Enable serial port & continuous receive
        TXSTA = $24 ' Enable transmit, BRGH = 1
        SPBRG = 129 ' 9600 Baud @ 20MHz, 0.16%
            
        PIE1.5 = 1  ' Enable USART interrupt
        

start:
        if PIR1.5 = 1 THEN  ' RCIF FULL?
                PORTB.0=1
                PAUSE 200
                PORTB.0=0
                WHILE PIR1.5 
                    TXREG=RCREG ' send it back to the pc
                                ' utill USART buffer is empty
                    wend
                
                if RCSTA.1=1 THEN  ' ANY Overrun?
                    RCSTA.4=0      '  YES clear it
                    RCSTA.4=1      '
                    ENDIF
                    
                endif
                
        goto start

just change DEFINE OSC, TXSTA and SPBRG to suite your requirement. Make sure you have a RS232 inverter (MAX232 or else) between your PC and your PIC.

And YES the DEFINE's have to be in capital letter, unless it will never work.