SENSATION!  (250-1650)        Optimizing Memory        Faxback Doc. # 2883

Optimizing memory on the Sensation! with DOS 6.x and DBLSPACE.

Use the following CONFIG.SYS and AUTOEXEC.BAT files to get the highest
amount of free memory in the Sensation! with DOS 6.x and DBLSPACE.  Also
listed is a necessary addition to the SYSTEM.INI file.  Last is the report
from MEM/C which shows the available memory using these instructions.

CONFIG.SYS
----------

DEVICE=C:\DOS\HIMEM.SYS
DEVICE=C:\DOS\EMM386.EXE NOEMS HIGHSCAN I=B000-B7FF I=C800-EFFF
DEVICEHIGH=C:\DOS\DBLSPACE.SYS /MOVE
DEVICEHIGH=C:\BIN\LMSDD250.SYS /D:MSCD001 /P:340 /I:11 /C:99 /M:6 /S
DEVICEHIGH=C:\DOS\SETVER.EXE
BUFFERS=15,0
FILES=30
DOS=UMB
LASTDRIVE=I
FCBS=4,0
DOS=HIGH
STACKS=9,256
SHELL=C:\COMMAND.COM C:\DOS /P

AUTOEXEC.BAT
------------

@echo off
set err=0
C:\DOS\SMARTDRV.EXE
LH C:\DOS\MOUSE
LH C:\BIN\VISBIOS
LH C:\DOS\MSCDEX.EXE /D:MSCD001
if errorlevel 1 goto fail
goto continue
:fail
echo.
echo A problem exists with your CD-ROM installation.
echo CONFIG.SYS must contain the statement:
echo.
echo   DEVICEHIGH=C:\BIN\LMSDD250.SYS /D:MSCD001 /P:340 /I:11 /C:99 /M:6
echo.
echo See your documentation for more information.
set err=1
pause
:continue

@ECHO OFF
PROMPT $p$g
PATH=C:\WINMATE;C:\WINDOWS;C:\MSWORKS;C:\BSHELF93;C:\WINDOWS\TOOLBOOK;
     C:\DOS
SET TEMP=C:\DOS
rem The sndmixer program sets the sound levels back to the saved
rem mixer settings.  sndmixer.exe /r (restore levels) [windows directory]
if exist c:\windows\sndmixer.exe c:\windows\sndmixer /r c:\windows
if exist c:\windows\win.com c:\windows\win

Note:  In the CONFIG.SYS file, the DBLSPACE.SYS line should be included
       ONLY if DoubleSpace has been installed.  If DoubleSpace is
       installed later, the DBLSPACE.SYS line should be moved to the
       position shown above.

       The "LASTDRIVE=" line may or may not already be in the CONFIG.SYS
       file.  If it is not there, do not add it.  If the line is there but
       set to a different drive letter, leave the drive letter as it is.

*  Windows will not load if you choose to use the monochrome region
   (B000-B7FF) as extended memory. According to the README.TXT file in
   DOS 6.x, a system with SVGA can use the monochrome region if the
   SYSTEM.INI file is edited. The following line must be added under
   the [386 enhanced] section:

       DEVICE=C:\DOS\MONOUMB.386

   The file MONOUMB.386 should be in your DOS directory. With this line
   added, B000-B7FF may be used as extended memory, and Windows will
   work fine.


The above configuration results in the following report from MEM/C:

Memory Summary (using above instructions):

Type of Memory        Total       =        Used       +        Free
--------------  ------------------  ------------------  ------------------
Conventional      655,360   (640K)     24,560    (24K)    630,800   (616K)
Upper             224,096   (219K)    185,216   (181K)     38,880    (38K)
Adapter RAM/ROM   393,216   (384K)    393,216   (384K)          0     (0K)
Extended (XMS)  2,921,632  (2853K)  1,270,944  (1241K)  1,650,688  (1612K)
--------------  ------------------  ------------------  ------------------
Total memory    4,194,304  (4096K)  1,873,936  (1830K)  2,320,368  (2266K)

Total under 1 MB  879,456   (859K)    209,776   (205K)    669,680   (654K)

Largest executable program size       630,704   (616K)
Largest free upper memory block        27,264    (27K)
MS-DOS is resident in the high memory area.


With DOS 6.2, the SMARTDRV driver is able to cache the CD-ROM, enabling it
to run much faster.

Listed below are lines 3,4,5 and 6 of the AUTOEXEC.BAT file.  These lines
are listed in the order that will enable the CD-ROM to be cached and give
the maximum amount of free memory.

   LH C:\BIN\VISBIOS
   LH C:\DOS\MOUSE
   LH C:\DOS\MSCDEX.EXE /D:MSCD001
   C:\DOS\SMARTDRV.EXE

This will result in the following memory configuration:

Type of Memory   Total  =   Used  +       Free
--------------  -------   -------   ---------------
Conventional    655,360    37,184   618,176  (604K)
Upper           224,096   173,952    50,144   (49K)

(SM&RL-1/05/95)