Install MASM (Assembly language) on Windows 7
The good old legacy MASM 6.11 (DOS) is a 16-bit version, that unfortunately only works on Windows XP and earlier versions of Windows.
However there is always some way to emulate the older softwares and run them without any compatibility issues. Since it is a DOS based application, we need to emulate the DOS environment to make it work.
We are going to use a free tool named DOSBox. It’s a free DOS emulator that can run old DOS applications. Let’s begin.
Download the DOSBox free emulator from here, and install it.
Download the MASM 8086 Assembler from here, and extract it.
Rename the 8086 folder to MASM. You can skip this step It’s not necessary to rename if you can remember the folder name.
Copy or Cut the MASM folder.
Go to your desired drive (C: drive is recommended), and paste the folder there.
Go back to the Desktop and double-click on the DOSBox to run.
Now before using MASM you need to mount the working directory.
type the command below to mount the drive:
mount C C:MASM
Change the drive letter to your desired drive where you have MASM installed. to change the drive from Z to C, type the command shown below:
To open the DOS Editor type:
Type your program source code, and save it by going to File -> Save or press Alt + F to open the File menu.
Save it in C:MASM (default directory) with the .asm extension in the end.
Exit from the DOS Editor to go back to the Command Prompt.
In the Command Prompt type this command to assemble the program.
Then just simply link the object by typing
and execute/Run it by typing just the program name:
That’s how you can use old DOS applications on a recent version of Windows. It all other commands are same as old MASM. Please drop any queries below in the comments.