emu8051 software package provides Emulator and simulator for 8051 microcontrollers, 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 emu8051
emu8051 is installed in your system.
Make ensure the emu8051 package were installed using the commands given below,
$ sudo dpkg-query -l | grep emu8051 *
You will get with emu8051 package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Electronics |
| Package | emu8051 |
| Version | 1.1.1-1 |
| Description | Emulator and simulator for 8051 microcontrollers |
| Sub Section | Electronics |