From: "Tony B." <tonybrewer AT bigDELETEfoot DOT com>
Newsgroups: comp.os.msdos.djgpp,comp.os.msdos.programmer
Subject: Re: get the amount of physical memory
Date: Wed, 4 Oct 2000 23:44:51 +0100
Organization: Customer of Energis Squared
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"Haim Cohen" <haim DOT cohen AT ntel DOT com> wrote in message
news:8rcc9m$fsr AT news DOT or DOT intel DOT com...
> Hi !
> Is someone know how to get the size of the available memory in the system
by
> C/C++ standard routines or assembly commands ?
> I mean the physical available memory, the size that the BIOS detects on
> system boot.
>
> thanks.

To get extended memory size, set ds:si to point to a buffer somewhere (at
least 26h bytes long) and call int 15h, function c7h, e.g.

;Debug test code
;assumes ds ok
mov si,200
mov ah,c7
int 15

Double word at 202 = number of 1k blocks from 1MB - 16MB
Double word at 206 = number of 1k blocks above 16MB

(This works on my PC, but might not on yours.)

Tony B.