Solved

Physical memory under win95

Posted on 1998-10-22
7
182 Views
Last Modified: 2010-04-02
How can i access to a physical memory under BC45 for win95 ?
For example, i want to access to 0xe9000000 physical address and modify one or more byte...

PLEASE someone can help me....
0
Comment
Question by:telexxingou
7 Comments
 
LVL 4

Expert Comment

by:agreen
ID: 1175748
You can do that only by writing a VxD.
0
 
LVL 86

Expert Comment

by:jkr
ID: 1175749
>>i want to access to 0xe9000000 physical address

This is 3909091328 in decimal -  3.9GB.... are you sure you have that much 'physical' RAM????????
0
 
LVL 1

Expert Comment

by:andla
ID: 1175750
Do you mean like manipulate hardware directly?
0
Why You Should Analyze Threat Actor TTPs

After years of analyzing threat actor behavior, it’s become clear that at any given time there are specific tactics, techniques, and procedures (TTPs) that are particularly prevalent. By analyzing and understanding these TTPs, you can dramatically enhance your security program.

 

Expert Comment

by:iliya
ID: 1175751
What do you want to make with this???
I am sure that there is another solution instead of what you want to make.
Do not forget that in user mode you can not make such things.

0
 

Expert Comment

by:streamer102198
ID: 1175752
You can't access physical adresses from Win95 and WinNT-applications directly. It's a task for the OS and it's drivers.
If you are not experienced, don't think of writing a driver.
There is however, some generel drivers available doing this task for you. And some are freware. I don't have the URL's available for the moment, but if you are interested, give a comment here and I will provide more information.
What the OS will have to do, is to map physical memory to the virtual memory-space of your process, and supply you with a pointer to it.

0
 
LVL 1

Expert Comment

by:andla
ID: 1175753
Why do you whant to access physical memory under BC45 for win95?
Tell us(me i'm curious) something you can't do the standard way.
:-)
0
 
LVL 2

Accepted Solution

by:
ivi earned 50 total points
ID: 1175754
>>>i want to access to 0xe9000000 physical address
>This is 3909091328 in decimal -  3.9GB.... are you sure you
>have that much 'physical' RAM????????

I'm sure (I think you too) that  telexxingou talked about
0xe900:0000 address.

Solutions:

1) Write your own VxD
2) Use a commercial WinRT tool from www.bluewatersystem.com
3) Use shareware TVicHW32 http://www.entechtaiwan.com/tools.htm
(MapPhysToLinear(Handle,0xe9000,YourSize)

0

Featured Post

Find Ransomware Secrets With All-Source Analysis

Ransomware has become a major concern for organizations; its prevalence has grown due to past successes achieved by threat actors. While each ransomware variant is different, we’ve seen some common tactics and trends used among the authors of the malware.

Join & Write a Comment

What is C++ STL?: STL stands for Standard Template Library and is a part of standard C++ libraries. It contains many useful data structures (containers) and algorithms, which can spare you a lot of the time. Today we will look at the STL Vector. …
C++ Properties One feature missing from standard C++ that you will find in many other Object Oriented Programming languages is something called a Property (http://www.experts-exchange.com/Programming/Languages/CPP/A_3912-Object-Properties-in-C.ht…
The goal of the video will be to teach the user the difference and consequence of passing data by value vs passing data by reference in C++. An example of passing data by value as well as an example of passing data by reference will be be given. Bot…
The viewer will be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.

706 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

18 Experts available now in Live!

Get 1:1 Help Now