dosbox software package provides x86 emulator with Tandy/Herc/CGA/EGA/VGA/SVGA graphics, sound and DOS, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install dosbox
dosbox is installed in your system.
Make ensure the dosbox package were installed using the commands given below,
$ sudo dpkg-query -l | grep dosbox *
You will get with dosbox package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Other OSs and file systems |
| Package | dosbox |
| Version | 0.74-4.2+b1 |
| Description | x86 emulator with Tandy/Herc/CGA/EGA/VGA/SVGA graphics, sound and DOS |
| Sub Section | Otherosfs |