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Is there a DOS memory documentation available? (Users)

posted by fritz.mueller Homepage, Munich, Germany, 08.01.2024, 20:30

> > Hi,
> > I come closer and closer to final version 1.1.0 of FreeDOS help, see:
> >
> > https://www.bootablecd.de/FreeDOS-Internet-version/help110/en/index.htm
> > (if you find a mistake there, please inform me.)
> >
> > What I am still missing is a short and simple to understand explanation
> of
> > the different DOS memory types, how it came to this and how to handle
> them
> > (different config/autoexec configurations etc.).
> > Does anybody know such a free documentation that I can overtake for FD
> > help?
>
> The descriptions given below by others are accurate, but I'm not sure are
> all that helpful to you for writing FreeDOS help. The descriptions sort of
> provide reasons as to why a PROGRAMMER might decide to use a particular
> type or combination of types of memory. What types of memory you may
> actually need to configure in FreeDOS at boot time depends on what programs
> you are going to run and what kind(s) of memory they use. No matter what
> you put in the help file, it will not be 100% accurate or complete. I
> applaud the effort, though.
>
> I will also say that the descriptions provided below do not really address
> the memory requirements of TSRs and device drivers, which are VERY
> different than "regular" programs. E.g., "regular" programs almost never
> use Upper or High Memory, and TSRs and device drivers almost never use
> DPMI. In addition, DPMI can be incompatible with certain kinds of TSRs
> (see the thread:
>
> http://www.bttr-software.de/forum/forum_entry.php?id=20131&page=0&category=0&order=last_answer
>
> which talks about problems between DPMI and SBEMU).
OK, I just uploaded the first version of memory.htm with a lot of links and comments from Rugxulo and bretjohn. If it is not ok, please tell me.
https://www.bootablecd.de/FreeDOS-Internet-version/help110/en/hhstndrd/help/memory.htm

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