Solved

MS-DOS & Extended Memory Access

Posted on 1998-08-24
2
310 Views
Last Modified: 2010-04-15
I am writing dos programs in C using Borland 4.x.  Where can I find a library that will let me access data beyond the 640K barrier (commercial lib is OK)?  I would like a lib that is aware of the newer versions of DOS such as 6.x and newer CPUS (386, 486) (i.e., I don't care about the old 286 days of EMS wars, etc.)
0
Comment
Question by:staggart
  • 2
2 Comments
 
LVL 8

Accepted Solution

by:
Answers2000 earned 100 total points
ID: 1252283
http://www.pharlap.com/ - click "DOS Extender on their site at left hand side"

This is the quote
(begin quote)
TNT Realtime DOS-Extender™; lets you build multimegabyte realtime 32-bit DOS applications. If you need more memory for your DOS-based realtime applications, TNT Realtime DOS-Extender will handle your programming needs. TNT Realtime DOS-Extender gives you soft realtime performance, the power of protected-mode programming, and the ability to create programs with a memory access range of 4 gigabytes. And you'll be able to use your familiar 32-bit C/C++ compiler from Microsoft, Borland and Watcom to build your application — so there's nothing new to learn!

Need even more memory for your Extended-DOS application? 386|VMM, Phar Lap's virtual memory manager, enables your 32-bit Extended-DOS programs to access more memory than is physically available.

286|DOS-Extender allows you to access memory beyond the 640K limit of DOS by running your application in the 16-bit protected mode of the 80286, 386, or i486 microprocessor. With 286|DOS-Extender, your application can directly access up to 16 megabytes of memory. 286|DOS-Extender does not alter DOS, but functions as a layer between DOS and your application: to DOS, your application looks like a real-mode program, while to your program, DOS looks like a protected-mode operating system.
(end quote)


0
 
LVL 8

Expert Comment

by:Answers2000
ID: 1252284
BTW I used this (old version) back in the late 80s but I've forgotten everything about it by now, and it's probably changed beyond recognition since then, so unfortunately I can't give you any tips.
0

Featured Post

[Webinar] Disaster Recovery and Cloud Management

Learn from Unigma and CloudBerry industry veterans which providers are best for certain use cases and how to lower cloud costs, how to grow your Managed Services practice in IaaS clouds, and how to utilize public cloud for Disaster Recovery

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Preface I don't like visual development tools that are supposed to write a program for me. Even if it is Xcode and I can use Interface Builder. Yes, it is a perfect tool and has helped me a lot, mainly, in the beginning, when my programs were small…
This is a short and sweet, but (hopefully) to the point article. There seems to be some fundamental misunderstanding about the function prototype for the "main" function in C and C++, more specifically what type this function should return. I see so…
Video by: Grant
The goal of this video is to provide viewers with basic examples to understand and use nested-loops in the C programming language.
The goal of this video is to provide viewers with basic examples to understand and use conditional statements in the C programming language.

867 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

17 Experts available now in Live!

Get 1:1 Help Now