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Implementing a Universal Turing Machine With Only mov Instructions

by Gregory Morse

UTM based on mov is Turing-complete paper x86 and x86-64

Controlling a Myo Armband with C#

by Dev Leader

Are you excited to get your Myo armband from Thalmic Labs? If you're a C# developer, then check out this open source library to help you control your Myo! The post appeared first on http://www.DevLeader.ca.

Building a Native Windows on Arm App with WinForms

by Thomas Daniels

This article will show how to create a simple but complete WoA-native Windows Forms application.

Porting Guide for Unity Game on Intel® Architecture for China Market

by Android on Intel

Porting Guide for Unity Game on Intel® Architecture for China Market

Latest Articles

Hacking with Windbg - Part 2 (Minesweeper)

by Sarthak S

Assembly inspection and hacking with windbg

Hacking with Windbg - Part 1 (Notepad)

by Sarthak S

Assembly inspection and hacking with windbg

Using Arm64EC with Windows 11

by Dawid Borycki

This article demonstrates how to use Arm64EC in a C++ application. The application you will implement performs the multiplication of two pseudo-randomly generated square matrices.

Building a Native Windows on Arm App with WinForms

by Thomas Daniels

This article will show how to create a simple but complete WoA-native Windows Forms application.

All Articles

x86

Implementing a Universal Turing Machine With Only mov Instructions

5 Feb 2017 by Gregory Morse

UTM based on mov is Turing-complete paper x86 and x86-64

Controlling a Myo Armband with C#

6 Oct 2014 by Dev Leader

Are you excited to get your Myo armband from Thalmic Labs? If you're a C# developer, then check out this open source library to help you control your Myo! The post appeared first on http://www.DevLeader.ca.

Building a Native Windows on Arm App with WinForms

24 Aug 2021 by Thomas Daniels

This article will show how to create a simple but complete WoA-native Windows Forms application.

how did the hardware support task switch in x86 architecture

1 Sep 2015 by Sergey Alexandrovich Kryukov

Please see my comment to the question.The idea is: you can switch the task with the instructions JMP or CALL, and it can happen by hardware interrupts. The essence of things in not in the switch instruction, but in what's the interpretation of the target address of this instructions. So,...

Please help me understand this....

9 Jul 2015 by OriginalGriff

"how do you store a 11 byte data into 1 byte memory?":laugh:You don't.db allocates bytes, not just a byte - so if you use msg db 'Hello, world!',0xathen it will allocate an area for an fourteen character string with the data filled in, not a single byte. The label msg will contain...

Please help me understand this....

9 Jul 2015 by F-ES Sitecore

msg db "ABC"the above places "ABC" at that memory address and that memory address is labelled as "msg". So if my code is at memory address 10000 then the following assemblymsg db "ABC"NOPwill result in10000 A10002 B10004 C10006 00 (00 being the NOP)Memory address...

Asm expression misunderstanding with times

3 Aug 2016 by Richard MacCutchan

buffer: db 'hello, world'times 64-$+buffer db '_'Assume the location of buffer is 1000, then the location of times (identified by the $ sign) is 1012.So:64 - 1012 = -948-948 + 1000 = 52The expression effectively calculates the number of dashes to add to the previous string to...

X86 assembly sorting problem

16 May 2018 by OriginalGriff

We do not do your homework: it is set for a reason. It is there so that you think about what you have been told, and try to understand it. It is also there so that your tutor can identify areas where you are weak, and focus more attention on remedial action. And 3 lines of C code does not count...

X86 assembly sorting problem

16 May 2018 by Patrice T

Quote: X86 assembly sorting problem What problem do you have on this HomeWork ? We do not do your HomeWork. HomeWork is not set to test your skills at begging other people to do your work, it is set to make you think and to help your teacher to check your understanding of the courses you have...

Linking assembly and C not working, undefined reference.

23 Nov 2022 by CodeSie Programming

I am using NASM on Windows, and was following a tutorial. maxofthree.asm: global _maxofthree section .text _maxofthree: mov eax, [esp+4] mov ecx, [esp+8] mov edx, [esp+12] cmp eax, ecx cmovl ...

Linking assembly and C not working, undefined reference.

23 Nov 2022 by k5054

your subroutine in asm file is _maxofthree, but your C program is looking for maxofthree, with no leading underscore. You should be able to get a clean link if you change the name of one or the other.

Does the x86 have a WatchDog Timer ?

7 Oct 2014 by C-P-User-3

Somebody is asking me about a WDT (WatchDog Timer) on an x86 machine running Linux.I've never heard of it. (On other chips, yes, but not on the x86)Do I need the extra education ? Or does he ?

how did the hardware support task switch in x86 architecture

1 Sep 2015 by codeprojectddx

I have been confused about this for a long time.As i know ,the thread switch is achieved by windows because of the cpu's support,but i actually donot know the mechanish.Hope a little help .thank you .

Porting Guide for Unity Game on Intel® Architecture for China Market

1 Oct 2015 by Android on Intel

Porting Guide for Unity Game on Intel® Architecture for China Market

create an Access DB within x64 applications

28 Oct 2015 by Marcus Steinbauer

Is there a possibility to create a Microsoft Access File with a x64 application?Before switching to x64 I used the Interop.ADOX.dll (v4.0.30319). But there is no 64bit version of the ADOX.dll.Are there other ways to create an acceess file?ThanksMarcus

create an Access DB within x64 applications

2 Nov 2015 by Leo Chapiro

This article means, it is possible with x64 version:Quote:The ACE providers (ACE DAO, ACE OLE DB or ACE ODBC) for Access 2007 product are available only in 32-bit. The ACE providers for Access 2010 product are available in both 32-bit and 64-bit editions.Basically, there are three...

create an Access DB within x64 applications

10 Nov 2015 by Marcus Steinbauer

are there open source solutions?

Asm expression misunderstanding with times

3 Aug 2016 by deck_bsd

Hello,Somebody can explain me these lines ?buffer: db 'hello, world'times 64-$+buffer db '_'result : "hello, world____________________________________________________"I understand these lines below, it makes sense (addresse where we stand minus addresse of the beginning of...

Errors "missing an assembly reference" when change platform any CPU to x86

4 Sep 2017 by tranthuyet

I have a window application (Visual Studio 2008/C#), It work fire when built by platform Any CPU, but when I try built by platform x86 was errors: "The type or namespace name 'Controls' does not exist in the namespace 'DevComponents.DotNetBar' (are you missing an assembly reference?) Pls help...

Errors "missing an assembly reference" when change platform any CPU to x86

4 Sep 2017 by Dave Kreskowiak

I don't know about the DevComponents library, but it would appear that your reference to this library is 64-bit only. Either remove the reference and re-add it to the 32-bit library, or contact DevComponents for support on the issue.

How do I print a certain number of stars in C programming?

19 Oct 2017 by Rick York

Firstly, I see no reason to use asm in there at all. Everything you are doing can be done in C. To your question, you have a do-while loop there getting the data and counting how much you have. Why can't you make another do-while loop to output the data? One more thing - you have this tagged...

How do I print a certain number of stars in C programming?

19 Oct 2017 by Richard MacCutchan

for (i = 0; items[i] != 0; i++) // for each entry in the array { int j; for (j = 0; j

How do I solve this visual studio error?

19 Oct 2017 by Rick York

Lose the second for loop with the variable j. There is no need for that. Also, there is no need for this to be inline assembler. That is all C code.

How do I solve this visual studio error?

19 Oct 2017 by OriginalGriff

Take the lines which switch you into and output assembler out of your C code: __asm Looking at your previous question: How do I print a certain number of stars in C programming?[^] I'd say you don't need any assembler - you only ever need it for very specific things you can't do in C - and a...

How do I get it to print the number of stars I have inputted it to print?

19 Oct 2017 by OriginalGriff

I'd start by preserving your assembler variables across the call to printChar: what happens if the C code uses ebx?

How do I get it to print the number of stars I have inputted it to print?

19 Oct 2017 by Richard MacCutchan

I showed you how to do it in your original question at How do I print a certain number of stars in C programming?[^]. If you want it in assembler then you just need to convert the C code sample I provided.

How do I create a loop using x86 assembly to print rows of stars from inputted values?

21 Oct 2017 by OriginalGriff

mov esi, [items] //esi points to start of 'numItems' ('items' points to address of 'numItems') Since when? Look at your code. Where does items get set to numitmes? In all seriousness, if you want to learn assembler, then I'd strongly suggest you dump the c stuff completely and use a "pure"...

Convert C source code into 16-bit 8086 assembly (for use with EMU8086)

12 May 2018 by CPallini

Did you see this: Is there a C compiler that targets the 8086? - Stack Overflow[^]? You may also choose to translate yourself the C program (if it is a simple one).

I have X86 question, about reverse an array. Anyone can help me how to code it

7 Oct 2019 by OriginalGriff

Inplace reverse is simple: loop through the number of elements divided by two. Swap the (first + the loop index value) with the (last - the loop index value) printing your course will already have covered. We are more than willing to help those that are stuck: but that doesn't mean that we are...

How can I print the content of an address and register in assembly 8086?

12 Oct 2019 by g0dafk

Let's take for eg. the address 010h and register DS. How can i access their values? I have a function that prints numbers as a binary code ( because that's what i want ). I want to print the content as a binary and decimal code. Leave alone the decimal code, i will figure that out later. How...

What are data hazards ? enumerate different classes of data hazards and how they can be tackled in a pipelined processor architecture design.

20 Apr 2020 by Dave Kreskowiak

Google is your friend. We're not here to answer your homework questions for you.

Discuss in detail key differences in design choices between SEQ+ and PIPE- processor architecture designs of Y86.

20 Apr 2020 by OriginalGriff

We are more than willing to help those that are stuck: but that doesn't mean that we are here to do it all for you! We can't do all the work, you are either getting paid for this, or it's part of your grades and it wouldn't be at all fair for us...

Wpf custom control in x64-bit architecture

28 Jan 2021 by DoingWork

I have 2 Textbox in Custom User Control. First TextBox's Text property is Bind to Str Property in DataContext While Seconds TextBox's Text property is assigned HARD-CODED Text. Target Platform is set to x64. Problem is that, with x64-bit, At...

General conversion from C language to assembly MIPS

7 Nov 2021 by Rick York

I would read this page closely and follow its examples : MIPS Assembly Language Examples[^]

computer-vision

Using Arm64EC with Windows 11

22 May 2023 by Dawid Borycki

This article demonstrates how to use Arm64EC in a C++ application. The application you will implement performs the multiplication of two pseudo-randomly generated square matrices.

What are the cons of coding a game engine in assembly?

6 Nov 2023 by Bob Blake from Unknown

I am planning to build a game engine that operates at a very low level without any abstractions and to do so, I was going to use NASM X86/X64. Is this a good choice or should I use a higher level language? I want to get the pros and cons of...

What are the cons of coding a game engine in assembly?

5 Nov 2023 by Dave Kreskowiak

You do know that Windows abstracts all the hardware from application code, right? You would have to go through DirectX to do anything with the hardware, but even DirectX is another abstraction layer.

How do I install libgbm_mesa library in my AOSP project?

14 Jan 2024 by Tushar Sondhi

I am getting the error saying "libgbm_mesa_wrapper (SHARED_LIBRARIES) android-x86" missing libgbm_mesa (SHARED_LIBRARIES android-x86)" in my AOSP project while I am trying to build it for x86 platform. I did try to set...

Digging into .NET Object Allocation Fundamentals

29 Sep 2014 by Ben M Watson

Understand exactly what happens during object allocation in .NET, why it's extremely efficient in the common case, and how to trigger slower code paths

Hacking with Windbg - Part 1 (Notepad)

31 May 2023 by Sarthak S

Assembly inspection and hacking with windbg

Metamorphic engines

22 Jan 2017 by Kewin Rausch

How an application performs metamorphism to adapt and survive in an "hostile" environment.

X86_64 IDE for MAC (rebirth of my Multi Emulator)

16 Jan 2018 by codestarman

This project describes an X86 assembler IDE for the MAC developed using JavaFX. The starting point was an X86 emulator developed by the author in C++, which was subsequently ported to C#.

Wpf custom control in x64-bit architecture

28 Jan 2021 by Lyandor

set the first textbox's binding mode to TwoWay and UpdateSourceTrigger to PropertyChanged. Binding Mode TwoWay makes the View communicate to and fro with the property in ViewModel. Setting UpdateSourceTrigger to PropertyChanged makes changes are...

Hacking with Windbg - Part 2 (Minesweeper)

5 Jun 2023 by Sarthak S

Assembly inspection and hacking with windbg

X86 assembly sorting problem

16 May 2018 by Member 13831057

Build a software project made of individual modules as shown in the diagram on one of the following pages. The diagram shows the calling hierarchy. It does not show the sequence of calls. The sequence (ordering) of execution can be derived from the sample execution on the next page. Sample...

General conversion from C language to assembly MIPS

7 Nov 2021 by ubutu2334

General conversion from C language to assembly MIPS if(condition) { clause1 } else { clause2 } Thanks What I have tried: condition clause2 j end then: clause1 end: How should I convert without a specific condition?

computer-vision

Convert C source code into 16-bit 8086 assembly (for use with EMU8086)

12 Apr 2023 by User 13703492

Hi all Does anyone if it is possible to convert C source code into 16-bit 8086 assembly (for use with EMU8086)? Thanks What I have tried: Tried using the assembly code emitted by Visual Studio but it is 32-bit and won't work.

Please help me understand this....

9 Jul 2015 by 0xF4

I have a major doubt it would be good if it is cleared.I am just writing what I know, please correct me if I am wrong.A 32bit register can hold 32bits or 4 bytes of data only, but when I write and execute the statement msg db 'Hello, world!',0xamov ecx,msgHow is it that it is...

How do I print a certain number of stars in C programming?

19 Oct 2017 by Member 13474080

I want the computer to analyse what I have written and print the number of asterisks corresponding to the number inputted. I can only manage a piece of code that can read what I have inputted. I can't use arrays but can use loop instructions like jnz and conditional instructions like cmp. What...

How do I solve this visual studio error?

19 Oct 2017 by Member 13474080

I am getting this error: inline assembler syntax error in 'opcode'; found '(' I don't know where I have gone wrong. What I have tried: The code is: for (i = 0; items[i] != 0; i++) { for (j = 0; j

How do I create a loop using x86 assembly to print rows of stars from inputted values?

21 Oct 2017 by Member 13477225

I have managed to print a row of stars but when I try to print another row from a new value, it creates an infinite loop. It stops at 0. I want to use x86 assembly and I am using visual studio. example input: 1 5 8 0 output: * ***** ******** What I have tried: #include "stdafx.h" #include...

I have X86 question, about reverse an array. Anyone can help me how to code it

7 Oct 2019 by chaserex

Use a loop with indirect or indexed addressing to reverse the elements of an integer array in place and display the modified array (calling the DumpMem method from the Irvine32 library). Do not copy the elements to any other array. Use the SIZEOF, TYPE, and LENGTHOF operators to make the program...

How can I write this assembly 8086 program?

28 Mar 2021 by Alessandro Dima

I am new to assembly and I have to write this program. The title says: Write a program in assembly 8086 language that ask the user to input a number. If the character read is '0' it executes a + 3, otherwise if it is '1' it executes a-3...