Subject: [pc] MEMORY & bitmap
From: EROUNTREE@pcmail.fnts.com
Date: Mon, 20 Sep 93 07:58:00 PDT


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>Brad Hedstrom ASKS
ABOUT MEMORY LIMITATIONS ON PC
If you are on a ISA machine DOS\windows 3.1 does not see more than
16meg.
DOS\Windows 3.1 does not support more than 16meg unless you have a EISA
machine and add the /EISA to himem.sys in config.sys EXample
device=C:\windows\himem.sys /EISA
"If you use the /EISA option do not load any device drivers that use the
Int15h/88h bios call to allocate extended memory before loading HIMEM.SYS."
The previous is from the WRK book for windows 3.1 I think.
Also there is some consideration explained further in WRK. If you must use
the Int15=option For example if you must reserve 128 Kilobytes of extended
memory use following command line in config.sys device=c:windows\himem.sys
/EISA /INT15=128 I am just quoting what I read.
I do run Labview on EISA machines Dell 466de and ME's but do not have more
than 16meg available in any one machine at this time. So I have never tried
/EISA but DELL technical support says the /EISA option should work to make
the machines see more than 16 meg memory.

Jim Henry WRITES
>I have a main VI which calls a subVI with a large bitmap picture on it.
> The subVI is closed before the main VI runs, it opens and shows the picture
> and then closes after a few (seconds), and then the main VI stops
>execution.

>When I run the main VI again, or maybe after several runnings again,
> I get a message of something like "out of application memory."
> (I'm going by my OWN memory limitations on this message, it was 3 days
>ago.)


1. I remember about 4-5 months ago being told there is a bug in reuse of
bitmaps by LV for windows 2.52 especially during printing which is solved in
LV 3.0, or maybe I remember this wrong.

2.Unless you have modified your win.ini, LABVIEW not see more than 4 meg for
it's total memory use 3 meg for application and 1 meg for data. If unfamilar
with this read LABVIEW Configuration options p.12 in Labview for windows
release notes version2.51part number 320540-01

2a. If you are going to be using large bitmaps I suggest at least 16meg memory
and modifiy the win ini. to larger totalmemsize and DATAmemsize.
regards
Edgar Rountree
Engineering Group
Repair Services
FNTS (FUJITSU NETWORK TRANSMISSION SYSTEMS)
Internet Address: erountree@pcmail.fnts.com