[comp.sys.mac.system] Why 350k of RAM "missing"?

kik@isr.harvard.edu (Ken Kreshtool) (06/27/91)

On a Mac IIsi running System 7, whenever I choose "About This Macintosh..."
and add up all of the memory in use
and unused, it always comes out to about 350k less than total memory.  This
is with 5 meg or 9 meg (just upgraded), with or without extensions off, and
even immediately after startup with extensions off and no nothing opened
(except the About This Macintosh... thing).

Does anyone know what's the scoop?  Is this a FAQ I missed?  (I saw the
recent thread about huge memory "losses", but this is different.)  Thanks 
for any info, and apologies if this has been discussed to death already.

Ken Kreshtool (kik@wjh12.harvard.edu)

paul@taniwha.UUCP (Paul Campbell) (06/27/91)

In article <1991Jun26.185551.1576@burrhus.harvard.edu> kik@isr.harvard.edu (Ken Kreshtool) writes:
>
>On a Mac IIsi running System 7, whenever I choose "About This Macintosh..."
>and add up all of the memory in use
>and unused, it always comes out to about 350k less than total memory.  This
>is with 5 meg or 9 meg (just upgraded), with or without extensions off, and
>even immediately after startup with extensions off and no nothing opened
>(except the About This Macintosh... thing).

Actually it's a clever and sneaky hack by the guy at Apple who did VM,
his Mac doesn't actually have any RAM in it, he just sneaks 350k odd
of space out of everyone elses ..... :-)

Actually, it's the space used by the "About this Macintosh ..." dialog :-)

well really I don't know .... maybe rounding between 1K and 1024 somewhere

	Paul

-- 
Paul Campbell    UUCP: ..!mtxinu!taniwha!paul     AppleLink: CAMPBELL.P

Tom Metzger's White Ayrian Resistance has been enjoined to stop selling Nazi
Bart Simpson t-shirts - Tom of course got it wrong, Bart is yellow, not white.

cjeff@silver.lcs.mit.edu (Carl J.M. Alexander) (06/29/91)

In article <1991Jun26.185551.1576@burrhus.harvard.edu> 
kik@isr.harvard.edu (Ken Kreshtool) writes:
>
>On a Mac IIsi running System 7, whenever I choose "About This Macintosh..."
>and add up all of the memory . . . it always comes out to about 350k 
>less than total memory....
>
>Does anyone know what's the scoop?  Is this a FAQ I missed?  (I saw the
>recent thread about huge memory "losses", but this is different.)  Thanks 
>for any info, and apologies if this has been discussed to death already.
>
>Ken Kreshtool (kik@wjh12.harvard.edu)
 
This is the price of free video:  you've just found where your built-in
video's memory is. 
 
--Carl Alexander                  |           BCS*Mac 
News Editor, The Active Window    |  The Boston Computer Society 
cjeff@silver.lcs.mit.edu          |     Macintosh Users Group