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Closed 10 years ago.
I want to write a simple applet to put in a tray. Let's say it will be for gnome taskbar or tint2. My applet should show system temperature or any other simple information by probing at a fixed amount of time /proc or maybe providing this info by clicking on the applet itself, I still have not decided.
My knowledge is limited, since I don't know where to start. What I need is some little info, on the difficulty of the matter, provided I'm fairly ok with bash, but that's it.
Where do I start and what should I read first? There should be gui, then is it gtk, qt or something else? Maybe somebody got a good link or just your opinion will be a good start for me.
Assuming you mean GNOME 2, you could start reading the document Gnome applets with Python. You will get the idea behind applets and how to do it with Python. For tin2 the API might be totally different.
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Closed 10 years ago.
I know that I need to know at least C and Assembly. In your own opinion what else does one need to know apart from knowing how to program in C and Assembly efficiently? Are there any books you can suggest to get me started? I also read that you need to know about the hardware architecture of the platform you are emulating. Would you also recommend the books listed here?
For experts only
You would have to know all the inner workings and hardware details of PSP, which are business secrets of Sony and therefore not published. The way most emulators are made is reverse engineering, a process in which the device itself is disassembled and its inner workings are studied. That includes analyzing the chips thoroughly, reading the contents of ROM chips and sometimes even deciphering encrypted data. Full analysis usually requires specialized equipment and years of engineering experience.
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Closed 10 years ago.
I've got a project, where I need to use hotkeys, that would work globally through the whole Windows OS. Now, from my knowledge I only know how to read Key events on current form. How would I go about programming a hotkey utility? And what would be the best language for it?
Thanks
For C#/.Net and a low-level hook (using Interops), have a look at Stephen Toubs example here (complete with source):
Low-Level Keyboard Hook in C#
For a more complete example (also C#/.Net and Interops), but with everthing neatly contained in a separate class, including trapping key presses using normal Events on the client side, check this out (the link to the actual source is in the blog text, a bit tricky to spot):
Global hotkeys with .NET
are you looking for something like this. even vhen the program is not active it should respond for a key press.
in windows,
#include<windows.h>
if(GetAsyncKeyState(0x41)){
//do somethong here
}
note: refer virtual key stats http://msdn.microsoft.com/en-us/library/ms927178.aspx
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Closed 11 years ago.
Can anyone tell me links for reading about mainframe internals like what happens in mainframe intrenally when I login or create a dataset or submit a job. I googled but couldnt find
Thanks in advance
The Principles of Operation will give you as low-level a look at mainframe internals as you're likely to get.
You mention wanting to know what happens internally "when I login or create a dataset or submit a job." You might want to ask yourself, "login to what?" exactly. TSO? CICS? IMS?
For creating datasets you might start with DFSMS.
For submitting jobs you might want to start with JES2 or JES3, depending on which one you're using.
None of what you're asking is a small topic.
A mainframe is fundamentally just like any other computer - it is just a matter of scale that differentiates a mainframe from a desktop. Fundamentally, what happens when you log in to a Windows desktop is very similar to what happens when you log in to a mainframe. The details are very different but fundamentally you are doing the same thing.
The links cschneid provided in his answer will give you a lot of the finer detail, but conceptually, what goes on inside a mainframe is similar to what goes on in any computer these days.
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Closed 11 years ago.
I was just wanting to go ahead and make an OS. Because working on projects makes one's knowledge quite good enough. I know I will have to study OS inside-out before actually trying to implement one on my own. I also know I wouldn't be able to implement something right from square one. So I searched the internet for something to work upon. The most common option that I found was to work upon existing Linux distro and contribute to it.
But I found some more interesting options. Would like your suggestions on what to choose for and work upon.
LFS: http://www.linuxfromscratch.org/lfs/
PintOS: http://www.scs.stanford.edu/10wi-cs140/pintos/pintos_1.html#SEC1
Cosmos: http://www.gocosmos.org/index.en.aspx
I would get around 6 months time to work upon it. But before I start off with it, I want to do my research work properly and finalize what and how to work.
Drop in your suggestions on what should I use to work on. :)
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Closed 12 years ago.
When somebody asks me about how strong you are in unix/linux internals ? What do they really mean ?
Though i have some idea, i would like to hear from some experts that, what is really meant by unix/linux internals.
My ideas are, i have to be strong in,
linux boot process
user creation
how does a command executes
filesystem related details
process details
I would like to know, whether this is sufficient or something else there ?
Update: I edited this question to add more details, if possible reopen the questions for answers?!
The internal design of the components of the Linux operating system (i.e. the kernel).