Assembly Language Programming is also termed as middle level language. Although it is way less powerful than the high level languages like C, C++, JAVA, etc. it is necessary to understand basics of assembly language as it helps in understanding the working and the instruction set of microprocessors and microcontrollers. Microprocessors like 8085 , 8086 and many other microcontrollers could be easily operated via simple instructions of assembly languages. MASM (Microsoft Macro Assembler) is a very efficient assembly language programming tool for windows and MS-DOS. It is not a emulator but an actual programming tool helps in programming with processor.
Sample Program In Masm32
1) A simple Message Box: MsgBox.zip (with source code; most of it is in the RadASM screenshot below!) 2) A twist on the classic DOS "Hello" program; now it's for Windows™: Hello10.zip. Although there's not much to it, you'll find an icon and all the usual Windows "Properties" (from the right-click menu in Explorer), and here's the info that many programming utilities will find:
If you are just starting out in Windows™ programming (or Assembly), you should check out the new (online) book by Randall Hyde "Windows Programming in Assembly". ( Randy is famous for his first online work: The Art of Assembly or just “AoA” as many call it; which has recently been revised; there's even a Linux edition now! ) He has many new web pages at his site dealing with Assembly under Linux if you'd like to learn programming for that OS!
Masm32 - A complete package for programming Windows™ using its API code and Assembly language. This uses Microsoft's Assembler program MASM (included), but gets its usefulness from a number of macros, include and library files and examples which a team of people have worked on. This is not for beginners as Hutch says, but there is a forum for intermediate users to get help and discuss what they're working on.
In the PrintMess procedure, I'm using print to show a message in the screen, that 10 after will move the cursor to a new line for the inkey function. Now let's go to the program that will use this DLL.
First of all, you need to do some things. Define the normal things (.386, .model and the includes), then you will declare some variables (hLib and hProc), the next will be the main program by using the DLL.
Now let's explain the code very quickly. I've declared a variable called lib that will store where the DLL is to open it and another variable called function that will store what procedure the program will execute (remember that you can create many other variables to other procedures), then the program will load the DLL using LoadLibrary that is stored in hLib variable. Next, the GetProcAddress will get the address of the procedure (PrintMess). After this, we need to call the function that is in hProc and to end we need to free the DLL using the FreeLibrary function.
Paul E. BrennickForwriting the Resource Editor english help, programminghis GeneSys editor, EasyCalc, CardFileand other good examples (all included), helpingme with testing Easy Code, and very specially for all his constant helpand support.PhillKahleFortranslating a big part of the english help file for the firstEasy Code version and helping me with testing Easy Code.RobertBieberForallowing to includehis excellent File Shredderand the RGG(aGDI demo) projects as Easy Code examples.MarkJonesForallowing to include his excellent MIDIPlayer projectas an Easy Code example.MarkWrightFor hisbig and constanthelp in testing and debugging Easy Code.JosepVallèsForwriting the spanishhelp file of the first Easy Code version.HéctorA. MedinaFor hisbig help andconstant support in testing and debugging Easy Code(especially on Windows 95), for coding the GetCPUInfomethod and for programming all code related to drivers.JasonJiangFortranslating the Chineselanguage files, both simplified and traditional.NoteworthyLordFortranslating the Frenchlanguage file.
SASM (SimpleASM) - simple Open Source crossplatform IDE for NASM, MASM, GAS, FASM assembly languages. SASM has syntax highlighting and debugger. The program works out of the box and is great for beginners to learn assembly language. SASM is translated into Russian, English, Turkish (thanks Ali Goren), Chinese (thanks Ahmed Zetao Yang), German (thanks Sebastian Fischer), Italian (thanks Carlo Dapor), Polish (thanks Krzysztof Rossa), Hebrew (thanks Elian Kamal), Spanish (thanks Mariano Cordoba). Licensed under the GNU GPL v3.0. Based on the Qt.
In SASM you can easily develop and execute programs, written in NASM, MASM, GAS or FASM assembly languages. Enter code in form and simply run your program. In Windows SASM can execute programs in separate window. Enter your input data in "Input" docking field. In "Output" field you can see the result of the execution of the program. Wherein all messages and compilation errors will be shown in the form on the bottom. You can save source or already compiled (exe) code of your program to file and load your programs from file.
In my program you can debug programs using the interface to the debugger gdb. You can watch values of variables and registers. Also you can set breakpoints and move through debugged program. In additional it is possible to perform any gdb command and see its result in the log on the bottom part of window.
SASM supports 4 working with assemblers - NASM, MASM, GAS and FASM in 2 modes - x64 and x86. You can choose mode in settings on "Build" tab. Also there you can change assembler and linker options and choose programs for assembling and linking.
If you have something does not work (errors occur when compiling, debugging, etc.), please read the chapter "Troubleshooting" in the help of the program (F1) or on the project Wiki on GitHub. Perhaps there you will find useful advice to solve your problems.
SASM includes crossplatform input/output library "io.inc" for NASM. To use it you need to add directive %include "io.inc" (%include "io64.inc" for x64) to the beginning of your program.Macro nameDescriptionPRINT_UDEC size, data
All assemblers (excluding MASM) are included in SASM and you can use they right away after their choice. MASM assembler can not be included in the assembly because of its license. To use it, you should install MASM on your computer from site and specify path to MASM assembler (ml.exe, path usually "C:/masm32/bin/ml.exe") and to MASM linker (link.exe, path usually "C:/masm32/bin/link.exe") in according fields on "Build" tab in settings.
A subdirectory named Examples will contain all the example programs shown in the book, source code for the book's 16-, 32-, and 64-bit libraries, and two sample projects for earlier versions of Visual Studio.
Visual Studio requires assembly language source files to belong to a project, which is a kind of container. A project holds configuration information such as the locations of the assembler, linker, and required libraries. A project has its own folder, and it holds the names and locations of all files belonging to it. If you have not already done so,Right-click here to download a zip file containing an up-to-date Visual Studio 2017project that has been configured for assembly language. After downloading this file, un-zip it into your working directory.It contains a sample asm test file named AddTwo.asm. Follow these steps:
Now you will build (assemble and link) the sample program. Select Build Project from the Build menu. In the Output window for Visual Studio at the bottom of the screen, you should see messages similar to the following, indicating the build progress:
The easiest way to run your first program is to use the debugger. First, you must set a breakpoint. When you set a breakpoint in a program, you can use the debugger to execute the program a full speed (more or less) until it reaches the breakpoint. At that point, the debugger drops into single-step mode. Here's how to do it: Make sure the ASM source code file is open in the editor window.
Click the mouse along the border to the left of the mov eax,5 statement. A large red dot should appear in the margin.
Select Start Debugging from the Debug menu. The program should run and pause on the line with the breakpoint.
Press the F10 key (called Step Over) to execute the current statement. Continue pressing F10 until the program is about to execute the invoke statement.
A small black window icon should appear on your Windows status bar. Open it and look at the contents of the Command window. The window should be blank because this program does not display any output.
Press F10 one more time to end the program.
You can remove a breakpoint by clicking its dot with the mouse. Take a few minutes to experiment with the Debug menu commands. Set more breakpoints and run the program again.Here's what your program will look like when paused at the breakpoint:
Soon you will want to display CPU registers when debugging your programs. Here's how to make them visible: First, under the Tools >> Options menu, select Debbuging in the left panel, and select Enable address-level debugging. Next, set a breakpoint in your source code on an executable statement, run your program in Debug mode, select Windows from the Debug menu, and then select Registers from the drop-down list. If you do not see the Registers command in the Debug >> Windows drop-down menu (which seems to be the case for the VS2017 Community Edition, there is a way to add a Registers command button to your Debug toolbar. Here's how to do it: While not debugging, select Customize from the Tools menu.
Click the Commands tab, select the Toolbar tab, and selectDebug from the list of toolbars.
Click the Add Command button. In the Categories list, select Debug.
Select Registers from the list of commands, click the OK button to close the dialog window.
Click the Close button to close the Customize dialog. You should nowsee a new button on the Debug toolbar that looks like a small rectangle containing "0X" when you begin debugging a program.
The Registers window may appear docked to the top of the workspace, but you may find it helpful to float the window on top of your workspace. Just grabthe window header with the mouse and pull it to the center area. You will alsowant to display the CPU flags. To do that, right click inside the Registers window and check the word Flags from the popup menu. You can interrupt a debugging session at any time by selecting Stop Debugging from the Debug menu. You can do the same by clicking the maroon-colored square button on the toolbar. To remove a breakpoint from a program, click its red dot to make it disappear.A reminder, you might want to review our tutorial:Using the Visual Studio debuggerBuilding and Running Other Programs Suppose you want to run another example program, or possibly create your own program. You can remove the existing assembly language file from the Solution Explorer window and insert a new .asm file into the project. 2ff7e9595c
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