STRING COPY

ASSUME CS:CODE,DS:DATA,ES:EXTRA
CODE SEGMENT
MOV AX,DATA
MOV DS,AX
MOV AX,0000H ; CLEAN ACCUMULATORq
MOV AX,EXTRA
MOV ES,AX
MOV AX,0000H ; CLEAN ACCUMULATOR
MOV CL,STR_SIZE
MOV SI,OFFSET STR1
MOV DI,OFFSET STR2
CLD ;CLEAR DIRECTION FLAGS
; OLD SCHOOL AND UNDERSTANDABLE CODE //
; ITER:
;     MOVSB
; LOOP ITER
; ELSE
REP MOVSB
;SAME AS ABOVE BUT REP ONLY WORKS FOR
; MOVSB AUTO-MAGICALLY MOVES EVERYTHING FROM SI REG TO DI REG
HLT
CODE ENDS
DATA SEGMENT
STR1 DB "HELLO WORLD"
STR_SIZE DB 11h
DATA ENDS
EXTRA SEGMENT
STR2 DB 11h DUP(0)
EXTRA ENDS
END