GNUSim8085 is a graphical simulator, assembler and debugger for the Intel 8085 microprocessor in Linux and Windows.

The following screenshot shows how the 'add with carry' program is being debugged. Follow this program to easily get started with GNUSim8085. There is also a brief guide to the 8085 assembly language.


According to your browser:
CCBot/2.0 (

You seem to be using some Linux distribution.

Or for the bleeding edge:

git clone git://
bzr branch lp:gnusim8085

If your operating system is not detected correctly then please head to downloads page to check all the available downloads.


GNUSim8085 is originally written by Sridhar Ratnakumar in Fall 2003 when he realized that no proper simulators existed for Linux. Several patches, bug fixes and software packaging help are due to various minds that are inclined to share knowledge. Thanks!

Support the development - (javascript disabled - Flattr this)