TITLE	ECHO PROGRAM
.MODEL	SMALL
.STACK	100H
.CODE
MAIN	PROC
; display prompt
	MOV	AH, 2		; display character function
	MOV	DL, '?'		; character is '?'
	INT	21H		; display it
; input a character
	MOV	AH, 1		; read character function
	INT	21H		; character in AL
	MOV	BL, AL		; save it in BL
; go to a new line
	MOV	AH, 2		; display character function
	MOV	DL, 0DH		; carriage return
	INT	21H		; execute carriage return
	MOV	DL, 0AH		; line feed
	INT	21H		; execute line feed
; display character
	MOV	DL, BL		; retrieve character
	INT	21H		; and display it
; return to DOS
	MOV	AH, 4CH		; DOS exit function
	INT	21H		; exit to DOS
MAIN	ENDP
	END MAIN