Allocating large memories

[manu1001]

I need to allocate memory of a few 100's of KB, using DOS on an Intel x86 processor. There is a way around using TurboC compiler specific features(messy). But can it be done with ANSI C?
(The problem arises with Intel's segmented memory and DOS's incapability of handling 32-bit addresses)
I've found very little resources on the internet regarding these topics. Will be glad if you could point to one.

[JosAH]

I need to allocate memory of a few 100's of KB, using DOS on an Intel x86 processor. There is a way around using TurboC compiler specific features(messy). But can it be done with ANSI C?
(The problem arises with Intel's segmented memory and DOS's incapability of handling 32-bit addresses)
I've found very little resources on the internet regarding these topics. Will be glad if you could point to one.

If I remember well those DOS C compilers had flags for that purpose: 'large
memory model' used segment:offset pointers for both code addresses as well
as data addresses. Check your compiler's flags.

kind regards,

Jos

[manu1001]

Yes, I've seen that, but it requires the usage of far pointers which is not part of the standard C. It would probably require a lot of modification to port it elsewhere.
Isn't there an alternative?

[weaknessforcats]

The data segment has a limit and you have to use near/far pointers plus compile for the memory model (TINY, LARGE, HUGE, etc... If I remember, DOS does all the swapping using a disc swapfile. Your task is to keep things within a segment to avoid a swap.

Unfortunately, it has been 12 years since I used DOS and I hace discarded all of my reference books and DOS software.

None of this has anything to do with C. These are just limits imposed on you by DOS.