Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!uwm.edu!linac!att!cbnewsh!rkl
From: rkl@cbnewsh.att.com (kevin.laux)
Newsgroups: comp.os.msdos.programmer
Subject: Re: Available dynamic memory in MSC 6.0
Message-ID: <1991Mar25.143624.24690@cbnewsh.att.com>
Date: 25 Mar 91 14:36:24 GMT
References: <1991Mar25.095017.9802@cs.umu.se>
Organization: AT&T Bell Laboratories
Lines: 20

In article <1991Mar25.095017.9802@cs.umu.se>, erikt@ume.cs.umu.se (Erik T{rnvik) writes:
> I'm using Microsoft C 6.0 in a major project. During execution I need to know
> how much (dynamic) memory is available for allocation. There are some functions
> (_maxavail() and _memavail()) that only seems to work in small models,
> but since we use large model, I cannot use those functions.
> 
> Right now I'm using the obvious but stupid method, I allocate and allocate
> until I hit the roof, and then I free the memory again. Not nice,
> but it works.

	Call Int 21h Function 48h (allocate memory) with BX set to FFFFh.
This call will fail because you're asking for a megabyte of memory.  *But*,
it will return the size of the largest block available in BX.  The value
returned in BX is in paragraphs (16 bytes).

-- 
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	R. Kevin Laux				Email: rkl1@hound.att.com
	AT&T Bell Labs				Voice: (908) 949-1160
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