I´ve realized that all the problems that appeared when running my program were due to my compiler.

My compiler doesnt recognize the directive:
.org 00h
but it does work fine if I write:
org 00h

I really don´t know what the full stop is used for, but when after trying all I noticed that when eliminited it all worked just fine.

I now have 2 problems:

1) I don´t know how to simulate with my 8052 emulator the recieving of data

2) I´m confused, should I get started wuith QBasic, or C? I don´t know oop (object oriented programming)

here goes the final version of the code:


ORG 000H ;locate routine at 00H
AJMP START ;jump to START
ORG 003H ;external interrupt 0
RETI
ORG 00BH ;timer 0 interrupt
RETI
ORG 013H ;external interrupt 1
RETI
ORG 01BH ;timer 1 interrupt
RETI
ORG 023H ;serial port interrupt
CLR EA ;unable interruptions
ACALL HAND_SHAKE
SETB EA ;enable interruptions again
RETI
ORG 035H ;locate beginning of rest of program

INICIO_TABLA EQU 040H
FIN_TABLA EQU 0FFH

SEND:
MOV SBUF,A ;Transmit Byte
JNB TI,$ ;Wait for transmission to be completed.
CLR TI ;Clear Transmit Flag
RET

RECIEVE:
JNB RI,$
MOV A, SBUF
CLR RI
RET

START_SENDING: ;Main program (on power up, program jumps to this point)
MOV R0,#INICIO_TABLA
LOOPS:
MOV A,@R0 ;Move Value in R0 to A (to be sent)
ACALL SEND ;Send Value to PC
INC R0 ;Increase the 8 bit value of by 1
MOV A,R0
CJNE A,FIN_TABLA,LOOPS ;Go to LOOP(jump back to point labeled LOOP)
RET ;End program

START_RECIEVING:
MOV R0,#INICIO_TABLA
LOOPR:
ACALL RECIEVE
MOV R0,A
INC R0 ;Increase the 8 bit value of by 1
CJNE A,FIN_TABLA,LOOPR ;Go to LOOP(jump back to point labeled LOOP)
RET ;End program


HAND_SHAKE:
PUSH 00H ;push R0
PUSH ACC
PUSH PSW
MOV IP, #010H
MOV PCON, #080H ;to double baud rate
MOV TH1, #0FDH ;Set up for 9600 baud rate
MOV SCON, #01010000B ;Mode = 8 bit UART
MOV TMOD, #00100001B ;Sets Timer1 to 8 bit auto reload
MOV TCON, #01000000B ;Turns Timer1 on
MOV A,SBUF
COMPARE:
CJNE A,#053H,START_RECIEVING ;if sbuf != s then recieve
ACALL START_SENDING ;else send

POP PSW
POP ACC
POP 00H ;pop R0
RET

START:
MOV IE,#098H
JMP $
END