.MODEL SMALL
.STACK 20H
.CODE


MAIN:

PUSH CX
PUSH DI
PUSH DS
PUSH DX

SUB AX, OFFSET BEGIN
MOV CX, 65536
SUB CX, AX

MOV DI, CX

MOV AX, 00H
SUB AX, OFFSET DONE
MOV DX, 65536
SUB DX, AX

CYCLE:                 ; CYCLE ADDS 1 TO ALL BYTES BETWEEN 'BEGIN' AND 'DONE'
ADD BYTE PTR DI, 1

PUSH DX
SUB DX, DI
JZ BEGIN
POP DX

ADD DI, 1
JMP CYCLE

MESSAGE DB "HELLO.$"

BEGIN:
POP DX
NOP
MOV DX, OFFSET MESSAGE
MOV AX, SEG MESSAGE
MOV DS, AX
MOV AH, 9
INT 21H

POP DX
POP DS
POP DI
POP CX

MOV AX, 4C00H
INT 21H
DONE:
END MAIN