FT2.1

N       EQU P3
TOTAL   EQU P1

CSEG AT 0000H
JMP INICIO
CSEG AT 0x50

INICIO:
    MOV SP, #0xFF
    MOV N,  #0x4
    MOV TOTAL, N

    MOV A, #0x4
    JMP DECREMENTAR

DECREMENTAR:
    DJNZ N, SOMA
    JMP FIM

SOMA:
    ADD A, N
    MOV TOTAL, A
    JMP DECREMENTAR

FIM:
    END