step 1
open this link to download dosbox
https://www.dosbox.com/
download and install it
step 2 Now download the MASM 8086 from following link of drive:
https://drive.google.com/file/d/0B001...
a) Download this folder
b) Extract the folder on desktop
c) Copy this 8086 folder and paste in C drive
By now you must have installed DOSBox and assembler on your desktop
run this command
1 mount c c:\8086
2 c:
3 edit
that is done