Free 8085 Simulator For Windows

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GnuSim8085 is a free 8085 simulator for Windows. Using this 8085 simulator software, you can easily write an 8085 assembly program and test it. Also, it has an intuitive interface where you can write, debug, and execute an 8085 program. While using this 8085 simulator, you can see the status of the registers, memory, flags, and data in them. Also, you can use the built-in decimal to a hexadecimal converter to quickly convert between decimal and HEX values.

If you use traditional 8085 board to do programming practices and other practicals, then you can switch to this software to do the same. Using this freeware you can also get to know where the program has raised an error as you can execute a program line by line. There is also an option given to determine the breakpoints. This free 8085 simulator for Windows is available in 12 languages.

Free 8085 Simulator For Windows

Let’s have a look how to use this 8085 simulator.

How to use this free 8085 Simulator for Windows?

If you are familiar with 8085 assembly programming, then you will be easily able to write and test assembly programs in it. Also, you can use the keypad given in the software to type mnemonics. And on its interface, you can see what values are currently available on memory, registers, and flags.

To use this free 8085 simulator for Windows, follow these simple steps.

Step 1: Download and install this free 8085 simulator from the link given at the end of this article. After that, open it up and you will see its interface which is divided into various sections. It has HEX to decimal converter, Editor, Registers area, flags area, and Assembler message. See the following screenshot.

gnusim8085 interface

Step 2: In the editor area, you can start typing your 8085 programs and when done, simply hit the F9 key to start execution.

gnusim8085 compilation

Step 3: If there are any errors, then they will be listed under Assembler Message section with the line number. Also, you can see the status of the used flags and registers after the execution of the program. You can see the following screenshot, in which I have executed a very simple program that calculates the sum of 2 numbers.

gnusim8085 simulation in action.

So, in this way you can use this free 8085 simulator for Windows to write and test assembly programs. It’s quite a powerful software to do that. Also, if you wish, you can execute the program liner by liner using the step over and step into options. These options are available in the Debug menu of the software.

All in all, I found this free 8085 simulator for Windows to be the one of the best software out there. Apart from just writing and executing the programs, you can also do some other tasks with it. For example, when you are done testing your program, then you can print it from its interface itself. And if you want, then you can customize the font of the program as well.

My Final Verdict

GnuSim8085 is a very good and  free 8085 simulator for Windows. It is best suited for the students who are from Electronics or Computer field. Using this simulator, they can write and test assembly programs on PC, without using the 8085 hardware kit. This simulator simulates the working of traditional 8085 kit in a very accurate and precise manner. And it has also provided various sections on its interface to monitor what values are currently held by the registers, memory, flags, etc.

Get GnuSim8085 from here.

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Works With: Windows
Free/Paid: Free