emu8051 [OPTION]... [FILENAME]


emu8051 is a simulator/emulator for the Intel 8051 family of microcontrollers. It is available in two versions: a console (text-only) version and a graphical version (using the GTK+ toolkit). This is an Open-Source project. The program can load Intel HEX files.

Once loaded, a program can be run (it will run indefinitely or until a breakpoint is encountered). You can also use the STEP button to execute only a single instruction at a time and see the effects on registers and memory.

It is written in C++, and uses Perl scripts to generate automatically C++ functions corresponding to each assembly instruction of the 8051 microcontroller.



display usage and exit


output version information and exit


emu8051 was originally written by Jonathan St-AndrĂ©, Hugo Villeneuve <[email protected]> and Pascal Fecteau.


emu8051 is free; anyone may redistribute it to anyone under the terms stated in the GNU General Public License. A copy of the license is included in the emu8051 distribution. You can also browse it online at