; V22.0201.002, machine org I; fall 97; yap.
title asc_box.asm
comment#
	Illustrating use of extended ascii character
	sets to draw simple graphics (in this case,
	a box with single lines).
end comment#
.model small
.stack 100h
.data
; the following suffices to draw a box
corner_nw equ 0dah
corner_ne equ 0bfh
corner_sw equ 0c0h
corner_se equ 0d9h
vertical  equ 0b3h
horizontal equ 0c4h
.code
start:
mov ax,@data
mov ds,ax
;
; In this simple example, I just draw the nw corner 25 times
;	you can easily extend this into drawing a box...
mov ah,9
mov al,corner_nw
mov bh,0
mov bl,0fh      ; fore black, back white
mov cx,25
int 10h
;
mov ax,4c00h
int 21h
end start