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Great Reads

NTP/SNTP v4/v3 Server/Client C++

by JadBenAutho

Efficient and standalone library for NTP server/client utilizing pure C++

A Monitored, Memory Mapped std::allocator for Mass Data Storage in STL Container

by stefan stammberger

A novel allocator implementation for managing huge sets of data in STL's std:: containers for Windows operating systems

Installing MINIX 3 on QEMU/KVM with Networking

by Mark Vinod Sinnathamby

Installing MINIX 3 on QEMU/KVM with networking

Create Your Own Kernel In C

by Pritam Zope

In this article we will create a simple kernel such as printing HelloWorld first and then writing functions for printing numbers, Keyboard I/O, Box Drawing GUI, and Tic-Tac-Toe game in kernel in C

Latest Articles

NTP/SNTP v4/v3 Server/Client C++

by JadBenAutho

Efficient and standalone library for NTP server/client utilizing pure C++

Lavoro - Web-based Approach for Operating System Development

by Mirzakhmet Syzdykov

Description of the Lavoro web operating system

A Monitored, Memory Mapped std::allocator for Mass Data Storage in STL Container

by stefan stammberger

A novel allocator implementation for managing huge sets of data in STL's std:: containers for Windows operating systems

Determining all bootable partitions

by hasan bozkurt

Determining all bootable partitions using PInvoke

All Articles

Operating Systems

How to access hard drive read and write without using operating system ?

31 Aug 2022 by ahmed_sa

I work on windows 10 , suddenly windows 10 crash and not open so can i access hard drive to get my data from my hard drive without depend on windows 10 i need tools access hard drive read and write and copy without using windows 10 because my...

operating-systems

How do I implement a shell to my OS

20 Nov 2023 by Andre Oosthuizen

You need to understand the basics of it before you can use the prompts - Guide to code a simple shell in C | Tutorial[^] This should point you in the right direction.

operating-systems

What are the technical features of embedded C programming

15 Mar 2022 by CHill60

This is a quick answers forum and your questions can't really be answered quickly. I recommend acquiring a good book on the subject e.g. Programming Embedded Systems in C and C++: Amazon.co.uk: Michael Barr: 9781565923546: Books[^] or Embedded C...

operating-systems

Copy bulk files in linux

4 May 2020 by CPallini

What about the documentation: cp(1): copy files/directories - Linux man page[^] ? If a single instance of cp doesn't fit your needs (not very clear to me) then, yes, you have to write the shell script.

operating-systems

How to implement multiple buffers in producer-consumer problem?

9 Jan 2021 by CPallini

You may find (just Google for) many pthread code samples about the producer-consumer problem. They could be your starting point.

synchronization

operating-systems

how windows applications executes internally when it is double clicked

7 Jan 2016 by dan!sh

When a .Net based executable is double clicked, _CorExeMain function is called first. Each managed .Net executable will have a entry point (Main method) in the CLR header. This function initializes CLR and then locates entry point in the assembly's CLR header and then begins execution....

operating-systems

Can anyone explain me how to install mac OS X on windows using oracle virtual box and where to get the mac OS X file for virtualbox.

3 May 2016 by Dave Kreskowiak

Is Google broken where you live?Create a bootable installer for OS X - Apple Support[^]Or just buy the retail box off the shelf. Any download off the web is going to be illegal and we're not going to support you to try and find one.

operating-systems

Can some one explain this

6 Oct 2022 by Dave Kreskowiak

Nobody can answer this for you. Every question is entirely dependent on your course material, which we don't have, nor want.

operating-systems

Need help with VB.NET code with dotnet 2.0 framework only

24 Jan 2019 by Dinesh Kumar Dora

Hello friends, I need VB.net solutions (in dotnet 2.0) for the following features: a) Detect OS architecture - x86 or x64 b) Read registry key from 64 bit reg key and Wow6432 nodes as well base don system architecture. Well i get the code solution for the above features but all were in C# and...

operating-systems

How many thread pool in TPL? With some confusing question come around my mind?

10 Dec 2016 by Er. Dinesh Sharma

Hi Experts,I am using .NET Framework 5.0 and using Task Parallel Library (TPL).I have some confusion in Managed Thread Pool which TPL Use.1)How many thread pool in machine having 4-Core Processor.?Is thread pool count depended on Operating System or Processor or Application ?2)When we...

operating-systems

Run exe on booting OS

18 Nov 2017 by Freelancers

Hello Guys, Is this possible to run application or exe before WINDOWS operating system login screen after start. I have developed a customized login screen using C#.net and want to replace/bypass standard OperatingSystem login screen by our screen. Thanks in advance...! What I have tried: ...

operating-systems

Copy bulk files in linux

4 May 2020 by Gabriel9999

I have multiple files in a Linux systems where I want to copy them with a single cp command into a different path and directory. Should I write a bash script to copy one by one? What I have tried: I have multiple files in a Linux systems where...

operating-systems

Scalability vs. Performance

23 Jun 2019 by Gerry Schmitz

One can only pump so much with a fixed diameter hose (i.e. bandwidth is finite).

operating-systems

How do I accept logical address data?

18 Feb 2017 by GodOfSass

Hey Guys ,I've coded a little piece of code that demonstrates the paging concept in Operating Systems. I've assumed the frame and page size to be 4 bytes.The problem is that i'm unable to enter the Logical Address Values!Request assistance on the...

operating-systems

I want some explains about this task, I cannot understand what should I do exactly

5 Jun 2021 by Greg Utas

This is a simulation of queueing within a scheduler, but it's an incomplete description. How many queues are there supposed to be? How is the work time for an arriving process determined? Is an arriving process queued according to its priority or...

operating-systems

Operating system ( race condition)

4 Aug 2021 by Greg Utas

To answer part (a), look at each function and think about what would happen if software on CPU1 calls the function and software on CPU2 also calls the same function (or even another of the stack functions), so that both processors are using the...

operating-systems

What are the technical features of embedded C programming

15 Mar 2022 by Greg Utas

The term "embedded system" can refer to anything from a toaster to a special purpose server whose source runs to tens of millions of lines of code, so it's hard to say much without knowing what kinds of embedded systems you mean. That said,...

operating-systems

Determining all bootable partitions

28 Jun 2018 by hasan bozkurt

Determining all bootable partitions using PInvoke

operating-systems

NTP/SNTP v4/v3 Server/Client C++

2 Mar 2024 by JadBenAutho

Efficient and standalone library for NTP server/client utilizing pure C++

operating-systems

synchronization

How to remove effect or upgrade command in ubuntu 14.4LTS

19 Jul 2018 by Jochen Arndt

If the upgrade has been performed, there is no way back. But your OS is starting. The Gnome error messages indicate that there is a problem with the graphical interface. If you know the shell (text console) you can activate that or the recovery mode (AFAIK by pressing ESC during booting to open...

operating-systems

UDP socket data receiving in port and take on different port

8 Sep 2018 by Jochen Arndt

That makes no sense on a single system. If you have received data once there, you can do with the data what you want so that there is no need to use another listener on a different port. If you refer to different systems, you have to send the data multiple times to each listening system. If all...

operating-systems

For my bulk allocator function how can I returns a pointer to a contiguous block of memory of at least size bytes, similar to malloc()

21 Apr 2020 by johnathan248

For my Bulk Allocator function how can I returns a pointer to a contiguous block of memory of at least size bytes, similar to malloc() extra 8 bytes will be given to a header for our bulk allocated objects in the same fashion as pool allocated...

operating-systems

How many thread pool in TPL? With some confusing question come around my mind?

12 Dec 2016 by Jon McKee

1) A thread pool is just a convenient thread manager. It increases and decreases the number of threads it uses based on load and can re-use threads to negate some overhead. It also keeps idle threads alive to further improve performance for repeated quick-running tasks. The maximum number of...

operating-systems

How to call multiple producers and consumers using message queues from a manager process

20 Apr 2020 by k5054

You will need to call fork() for each producer and consumer you wish to create, so more like pid_t producers[NUM_PRODUCERS]; pid_t consumers[NUM_CONSUMERS]; for(size_t i = 0; i

operating-systems

Copy bulk files in linux

4 May 2020 by k5054

Some options for you If you just want to copy the directories from one place to another then use cp cp -rp dir1 dir2 dir3 ... dest The -rp flags tell cp to copy recursively and keep permissions/timestamps on the copies. If you want to move the...

operating-systems

How to implement multiple buffers in producer-consumer problem?

9 Jan 2021 by KarstenK

at first you must learn and understand the basic of C and multi-threading is an advanced theme. Looks like soome pthread tutorial. You can imagine it as some persons are in the kitchen and are cooking together. The biggest problem is to explain...

synchronization

operating-systems

How do I determine which icon set to use for my application?

31 Dec 2017 by kkdxghlctlcxxtidyuum

Hello, After installing a new distribution of GNU/Linux, I found that various applications were using a different icon set for their MenuStrips and ToolBars. My old distribution used the GTK+ icon set (Debian), my new distribution uses the Mint-X icon set (Linux Mint). My question is: how does...

operating-systems

Is there a universal way to connect every device and running their supported commands?

7 Aug 2018 by leone

Hi. I am working for a broadcast company. And i realised that we are using many kind of devices such as satellite recievers (both home type and industrial type), signal decoders, regular switches and routers and many more which even i dont know what they do. long story short, i wonder is there a...

operating-systems

Can some one explain this

6 Oct 2022 by Lissette Velec

Now, let’s see if we understand this tiny address space we’ve constructed (using the parameters from the question above). What is the highest legal virtual address in segment 0? What about the lowest legal virtual address in segment 1? What are...

operating-systems

Need help with VB.NET code with dotnet 2.0 framework only

23 Jan 2019 by Maciej Los

If you would like to get OS architecture, check this: How to Detect 64bit OS/Process on .NET 2.0 to 3.5[^] See also: c# - What is the most reliable way to detect windows OS Architecture (x86,x64) on .NET 2.0 - Stack Overflow[^]

operating-systems

Scalability vs. Performance

12 May 2020 by MadMyche

Solution 3: Sorry, but doesn't we have virtually unlimited processing and storage capacity mean that we have virtually unlimited bandwidth Not in the slightest. Analogy 1 would be having a very large beverage(storage) and a very large...

operating-systems

Installing MINIX 3 on QEMU/KVM with Networking

21 Sep 2016 by Mark Vinod Sinnathamby

Installing MINIX 3 on QEMU/KVM with networking

operating-systems

how windows applications executes internally when it is double clicked

7 Jan 2016 by Member 12251089

how windows applications executes internally when it is double clicked

operating-systems

How would I create my own operating system?

26 Nov 2016 by Member 12872266

I have a big project coming up for me soon. I was going to create my own very basic video game console. Now, I was going to set it up like a pc (small case to hold hard drive, mother board, ect). Using hdmi to display to a television, and reading from a disc to play my own created games. I...

operating-systems

I want some explains about this task, I cannot understand what should I do exactly

5 Jun 2021 by Member 13556149

Arrival processes will be generated based on poisson distribution. for each queue generate arrival processes according to different poisson processes with different lambda values. in other words interarrival times of each process should be...

operating-systems

How to remove effect or upgrade command in ubuntu 14.4LTS

19 Jul 2018 by Member 13675865

I want to upgrade our ubuntu 14.4LTS to 16 operating system. So i run upgrade command. after command run i restart the OS. than system give some error gnome session related and not start operating system. How can i solved it. What I have tried: I want remove the upgrade command effect in the...

operating-systems

UDP socket data receiving in port and take on different port

8 Sep 2018 by Member 13977781

my limitation is i can send udp socket data in one port ,and my requirement is i want to recieve same data in another port.how it possible??? is there any setting or script for this problem? What I have tried: No solution is found in any of the case , please help.

operating-systems

File is not printed to virtual printer after updating windows updates

27 Feb 2022 by Member 14047666

In Win 10 Pro 20H2 (OS Build 19042.685) OS, When file is printed to virtual printer driver from Photos App, then Print Job is started Windows and Spooler (.SPL) generating file's in "C:\Windows\System32\spool\PRINTERS" directory. File is printed...

operating-systems

How to call multiple producers and consumers using message queues from a manager process

20 Apr 2020 by Member 14807614

I am pretty new to the concepts of inter-process communication, therefore, need some help, I need to implement a multiple producer-consumer problem using message queues in which there is a manager process that calls 5 producers and 5 consumers...

operating-systems

What are the technical features of embedded C programming

15 Mar 2022 by Member 15314815

I have some C, C++ programming skills which can be utilized for building embedded applications in real time. I am working on learning C, C++ programs for developing embedded applications in real time. As I do not have full time work experience in...

operating-systems

How can I implement text input functionality in my custom operating system?

27 Oct 2023 by Member 16074989

Here's my code: #include #include #include enum vga_color { VGA_COLOR_BLACK = 0, VGA_COLOR_BLUE = 1, VGA_COLOR_GREEN = 2, VGA_COLOR_CYAN = 3, VGA_COLOR_RED = 4, VGA_COLOR_MAGENTA = 5, ...

operating-systems

How do I implement a shell to my OS

19 Nov 2023 by Member 16074989

#include #include #include #include #include #include #include #include "GDTandIDT.h" #include "mm.h" #include "schedule.h" #include "fs.h" #include "initrd.h" ...

operating-systems

Lavoro - Web-based Approach for Operating System Development

24 May 2023 by Mirzakhmet Syzdykov

Description of the Lavoro web operating system

operating-systems

How to implement multiple buffers in producer-consumer problem?

9 Jan 2021 by Muhammedcan Pirinççi

Let's say I have 3 kinds of bakery shops.I wanna have a buffer for each one of them.With that way i can control producing-consuming for each bakery shops. How can I implement it to c language with Pthreads? Thanks in advance What I have tried:...

synchronization

operating-systems

Operating system ( race condition)

4 Aug 2021 by Nguyễn Tiến Phát

The pseudocode of Figure 6.15 illustrates the basic push() and pop() operations of the based stack array. Assuming that this algorithm can be used in a concurrent execution environment, return answer the following questions: a. Which data has...

operating-systems

Can I download windows 10 on core to duo

28 May 2016 by OriginalGriff

I'd suggest that you might want more RAM: 2GB is not a lot, and both VS and SQL server can eat a lot. That may be a bit too slow for real world use.Other than that, I use a Intel E6700 (core 2 Duo) processor @ 2.66GHz with 4GB of RAM and VS2013 / SQL Server 2012 work fine under Win10 64 bit,...

operating-systems

How would I create my own operating system?

26 Nov 2016 by OriginalGriff

I suspect you are biting off a much bigger chunk of food that you think: writing an OS from scratch is not a trivial task! Heck, when the PC was first invented, IBM didn't write their own OS for it, but bought it in from a tiny company running out of a garage called "Microsoft" - and at the...

operating-systems

Run exe on booting OS

18 Nov 2017 by OriginalGriff

No. "Normal" applications must be run under a user account, and one hasn't been established until the login is complete. You can run services before login, but they cannot have a user interface. Why are you trying to do this?

operating-systems

Is there a universal way to connect every device and running their supported commands?

7 Aug 2018 by OriginalGriff

No. There are protocols - lots of 'em - but no particular device has to use it, unless it is actually connecting to a communications medium - such as a LAN, WiFi network, or the internet which requires a specific form of communication like Internet Protocol for example. Even then, the...

operating-systems

Scalability vs. Performance

23 Jun 2019 by OriginalGriff

Think about it: I have information you want, and I am sending it to you right now. But ... you don't receive it instantly - it takes time to type, then I send it via broadband to New York, which sends it to Toronto, where it reaches CP's servers, which decides to send you an email, so that goes...

operating-systems

I want some explains about this task, I cannot understand what should I do exactly

5 Jun 2021 by OriginalGriff

While we are more than willing to help those that are stuck, 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...

operating-systems

File is not printed to virtual printer after updating windows updates

27 Feb 2022 by OriginalGriff

This is not a development question - or if it is it's lacking any sign of development content - and this is a dev site. Please try a Windows support site, such as Microsoft Support[^] They will be able to help you much better than we can.

operating-systems

How to access hard drive read and write without using operating system ?

31 Aug 2022 by OriginalGriff

Either use a bootable USB / CD / DVD, or physically transfer the disk to a new computer and access it from that. Be aware though, that most of your files will be stored under a specific user ID, and unless the new computer is logged in with the...

operating-systems

What is the answer of this question? Explain please

28 Oct 2023 by OriginalGriff

While we are more than willing to help those that are stuck, 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...

operating-systems

Copy bulk files in linux

4 May 2020 by phil.o

Gabriel9999 wrote: Should I write a bash script to copy one by one? Yes; if there are several destinations, you cannot write a single command for all of them.

operating-systems

Create Your Own Kernel In C

13 Jan 2018 by Pritam Zope

In this article we will create a simple kernel such as printing HelloWorld first and then writing functions for printing numbers, Keyboard I/O, Box Drawing GUI, and Tic-Tac-Toe game in kernel in C

operating-systems

Need help with VB.NET code with dotnet 2.0 framework only

24 Jan 2019 by Richard Deeming

Reading 64/32-bit registry keys in .NET 2.0 will require some P/Invoke calls: How to read the 64 bit registry from a 32 bit application or vice versa | Rhyous[^] The code in that post is in C#, but it should be possible to convert it to VB.NET; otherwise, you could always create a C# assembly...

operating-systems

How do I accept logical address data?

18 Feb 2017 by Richard MacCutchan

You have the following statement: cin>>logical[i];but logical is an array of char* so you cannot directly write some text into one of its cells. You need to read the data into a new character string and then post its address into the array item. You should also not use expressions...

operating-systems

How do I determine which icon set to use for my application?

31 Dec 2017 by Richard MacCutchan

See How to Set the Look and Feel (The Java™ Tutorials - Creating a GUI With JFC/Swing - Modifying the Look and Feel)[^]

operating-systems

What is the answer of this question? Explain please

28 Oct 2023 by Richard MacCutchan

See LRU replacement algorithm - Google Search[^] [edit] My answer is 9 based on the following table: There are 3 physical pages and 5 virtuals, so the following tables show the virtual page loaded into each physical. Start the loader loads the...

operating-systems

For my bulk allocator function how can I returns a pointer to a contiguous block of memory of at least size bytes, similar to malloc()

20 Apr 2020 by Rick York

Here is one way this can be done : void * Allocator( size_t amount ) { size_t desired = amount + sizeof( AllocationHeader ); size_t allocAmount = std::max( desired, MinimumAllocationAmount ); unsigned char * p = (unsigned char...

operating-systems

A Monitored, Memory Mapped std::allocator for Mass Data Storage in STL Container

26 May 2020 by stefan stammberger

A novel allocator implementation for managing huge sets of data in STL's std:: containers for Windows operating systems

operating-systems

Scalability vs. Performance

12 May 2020 by Tara11

hen a system needs to scale, very different types of problems need to be solved. Let us first consider scaling with respect to size. If more users or resources need to be supported, we are often confronted with the limitations of centralized...

operating-systems

Scalability vs. Performance

23 Jun 2019 by Tara11

Sorry, but doesn't we have virtually unlimited processing and storage capacity "mean that we have virtually unlimited bandwidth and ... so we shouldn't have those problems that you said?

operating-systems

Can I download windows 10 on core to duo

28 May 2016 by wardakhan

Can I download Windows 10 on Core to duo-IntelRequirement:Processor: 2.00GHz, RAM: 2GB, 32bit OS, Intel(R) G33/G31 Express Chipset Family.I will run VS 2013, SQL Server and other software. Will Windows 10 work flawlessly?Please suggest me what is good for me.

operating-systems

What is the answer of this question? Explain please

5 Nov 2023 by work business

The sequence of memory references with memory addresses from a 490-word program is as follows: 480, 315, 230, 173, 86, 411, 185, 11, 386, 215, 104, 10. Assuming a page size of 100 words and a primary memory capacity of 300 words, what is the...

operating-systems