Article: Q83435
Product(s): Microsoft Windows 3.x Retail Product
Version(s): 3.10 3.11
Operating System(s):
Keyword(s):
Last Modified: 30-JUL-2001
SUMMARY
=======
The information in this article can be found in the SYSINI.WRI file in the
Microsoft Windows Resource Kit for the Microsoft Windows operating system
version 3.1. The SYSINI.WRI file can be viewed in Microsoft Windows Write. Write
is an application contained in the Windows Accessories Group.
The [386Enh] section of the SYSTEM.INI file contains information specific to
running Windows in 386-enhanced mode, including information used for
virtual-memory page swapping.
MORE INFORMATION
================
The [386Enh] section can contain the following settings:
===============================================================================
32BitDiskAccess=<boolean>
Default: Off if your hard disk is capable of supporting 32-
bit disk access. Otherwise, this setting is not
present in the SYSTEM.INI file.
Purpose: Turns 32-bit disk access on or off.
To change: Choose the 386 Enhanced icon in the Control
Panel window. If this setting is not present in
the SYSTEM.INI file, the 32-bit Disk Access
check box will not appear in the Control Panel
Virtual Memory dialog box.
===============================================================================
A20EnableCount=<number>
Default: The value computed by the Win386 loader.
Purpose: Specifies the initial A20 enable count. (For more
information about the A20 enable count, see your
Extended Memory specification).
To change: Use Notepad to edit the SYSTEM.INI file. (You
should never need to change this setting.)
===============================================================================
AllVMsExclusive=<Boolean>
Default: False
Purpose: If enabled, this setting forces all applications
to run in exclusive full-screen mode, overriding
all contrary settings in the applications' program
information files (PIFs). Enabling this setting
might prolong the length of the Windows session
when you are running network and memory-resident
software that is incompatible with Windows.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
AltKeyDelay=<seconds>
Default: .005
Purpose: Specifies how much time Windows waits to process a
keyboard interrupt after it processes an ALT
interrupt. Some applications expect a slower
processing rate than Windows in 386 enhanced mode
normally uses. Increase this value if such an
application has trouble handling the ALT key.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
AltPasteDelay=<seconds>
Default: .025
Purpose: Specifies how much time Windows waits before
pasting any characters after the ALT key has been
released. Some applications may require more time
for recognition of the ALT keystroke.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
AllEMSLocked=<Boolean>
Default: False
Purpose: If enabled, this setting locks the contents of
expanded memory used by all Windows and non-
Windows applications into memory (instead of
swapping it to disk) and overrides the non-
Windows application PIF settings for EMS Memory
Locked. Set this value to True if you are using a
disk cache program that uses expanded memory.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
AllXMSLocked=<Boolean>
Default: False
Purpose: If enabled, this setting locks the contents of the
extended memory used by all Windows and non-
Windows applications into memory (instead of
swapping it to disk), and overrides non-Windows
application PIF settings for XMS Memory Locked.
To change: Use Notepad to edit the SYSTEM.INI file. (You
should never need to change this setting).
===============================================================================
AutoRestoreScreen=<Boolean>
Default: True
Purpose: Specifies whether the display for non-Windows
applications should be restored by Windows or the
applications themselves when they become active.
If enabled, Windows saves the display information
for a non-Windows application in memory when you
switch away from the application. When you switch
back to the application, Windows uses this
information to restore the screen. If disabled,
the application must restore its own display by
repainting the screen. This requires less memory,
but can slow down performance since Windows can
usually restore the screen faster.
Note: This setting only applies to VGA displays and affects
only applications that notify Windows that they can
update their own screen automatically when Windows
initiates a display update call.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
BkGndNotifyAtPFault=<Boolean>
Default: True for VGA displays; False for 8514 displays.
Purpose: Specifies when a notification should be sent to a
non-Windows application or to Windows to prevent
the application from attempting to access the
display (which might corrupt the display of a
different application). This notification can be
sent while switching to a different application or
when attempting to access the actual display. If
disabled, Windows sends a notification when
switching between applications. Disable this
setting if you are using a display that has
special hardware, (for example, 8514 and TIGA). If
you are using a VGA display, enabling this setting
should work in most cases.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
CGA40WOA.FON=<filename>
Default: None
Purpose: Specifies the filename of the fixed-pitch display
font used for non-Windows applications with a
display of 40 columns and 25 or fewer lines.
To change: Quit Windows and run Setup from the MS-DOS
prompt. Change the Codepage or Display
setting.
===============================================================================
CGA80WOA.FON=<filename>
Default: None
Purpose: Specifies the filename of the fixed-pitch display
font used for non-Windows applications with a
display of 80 columns and 25 or fewer lines.
To change: Quit Windows and run Setup from the MS-DOS
prompt. to change the Codepage or Display
setting.
===============================================================================
CGANoSnow=<Boolean>
Default: No
Purpose: If enabled, causes Windows to do special handling
to avoid snow appearing on an IBM CGA display
device.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
COM1AutoAssign=<number-or-seconds>
COM2AutoAssign=<number-or-seconds>
COM3AutoAssign=<number-or-seconds>
COM4AutoAssign=<number-or-seconds>
Default: 2
Purpose: Indicates the contention detection values for each
connected serial port. These values are used by
Windows to determine how to arbitrate requests for
the use of a device by more than one application,
at least one of which is a non-Windows
application. If the value is -1, Windows will
display a warning message that asks you which
application should be given control of the port.
If the value is zero, any application can use the
device at any time. If the value is a positive
integer less than 1,000, this value represents the
number of seconds after an application stops using
the device before another application can use the
same device.
To change: Choose the 386 Enhanced icon from the Control
Panel window.
===============================================================================
COM1Base=<address>
COM2Base=<address>
COM3Base=<address>
COM4Base=<address>
Default: COM3Base=3E8h and the port address values located
in the BIOS data area for COM1, COM2, anc COM4.
Purpose: Specifies the base (first) port for the serial
port adapter you are using. Check you hardware
documentation for the appropriate value.
Note: Windows uses these values for both standard and 386
enhanced mode.
To change: Use the Advanced Settings dialog box for the
Ports option in Control Panel.
===============================================================================
COMBoostTime=<milliseconds>
Default: 2
Purpose: Specifies the amount of time (in milliseconds) to
allow a virtual machine to process a COM
interrupt. If a communications application is
losing keyboard characters on the display, you can
try increasing this value.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
COM1Buffer=<number>
COM2Buffer=<number>
COM3Buffer=<number>
COM4Buffer=<number>
Default: 128
Purpose: Specifies the number of characters that the device
on the corresponding serial port will place in the
buffer. Before changing one of these settings, see
the corresponding COMxProtocol setting to make
sure that it has the proper value. Buffering may
slow down communications on a port, but might be
necessary to prevent some communications
applications from losing characters at high baud
rates. The size of the buffer required will depend
on the speed of the machine and the application's
needs.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
COMMdrv30=<Boolean>
Default: False
Purpose: If enabled, indicates that the Virtual COM Driver
(VCD) uses its own copy of the serial communica-
tions driver's interrupt handler. This improves
performance of your COM ports. Enable this setting
if you are using a Windows 3.0 serial communica-
tions driver. Disable this setting if you are
using the standard Windows 3.1 serial communica-
tions driver.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
COM1FIFO=<Boolean>
COM2FIFO=<Boolean>
COM3FIFO=<Boolean>
COM4FIFO=<Boolean>
Default: True
Purpose: Specifies whether the FIFO buffer of a COM port's
16550 Universal Asynchronous Receiver Transmitter
(UART) should be enabled (true) or disabled
(false). If a serial port does not have a 16550
UART, this setting is ignored.
Note: These values are used by Windows for both standard
and enhanced modes.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
COM1Irq=<number>
COM2Irq=<number>
COM3Irq=<number>
COM4Irq=<number>
Default: COM1Irq=4; COM2Irq=3; COM3Irq=4; COM4Irq=3 for ISA
and EISA machines. COM1Irq=4; COM2Irq=3;
COM3Irq=3; COM4Irq=3 for MCA machines
Purpose: Specifies which interrupt line is being used by
the device on the corresponding serial port. Check
your hardware documentation for the appropriate
value. If there is a hardware conflict between
ports, set this value to -1 to disable input for a
COM port.
Note: Windows uses these values for both standard and 386
enhanced mode.
To change: Use the Advanced Settings dialog box for the
Ports option in Control Panel.
===============================================================================
COMIrqSharing=<Boolean>
Default: True for Micro Channel (TM) and EISA machines;
False for all other machines
Purpose: Specifies whether COM interrupt lines are sharable
between multiple serial ports or with other
devices. Enable this setting if your machine uses
the same interrupt for COM3 or COM4 as it does for
COM1 or COM2.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
COM1Protocol=<XOFF-or-blank>
COM2Protocol=<XOFF-or-blank>
COM3Protocol=<XOFF-or-blank>
COM4Protocol=<XOFF-or-blank>
Default: (Default is no entry, which is the same as any
entry other than XOFF)
Purpose: Specifies whether Windows in 386 enhanced mode
should stop simulating characters into a virtual
machine after the virtual machine sends an XOFF
character. Set the value for a port to XOFF if a
communications application using that port is
losing characters while doing text transfers at
high baud rates. Windows will resume simulating
characters when the virtual machine sends another
character after the XOFF character. Leave this
setting disabled if the application is doing
binary data transfers; enabling this switch might
suspend binary transmissions. Windows will not
check for XOFF characters if this setting is blank
or set to anything other than XOFF. If the
application continues to lose characters after
this setting is properly set, try increasing the
corresponding COMxBuffer value.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
Device=<filename-or-*devicename>
Default: None (Setup assigns appropriate values based on
your system configuration.)
Purpose: Specifies which virtual devices are used with
Windows in 386 enhanced mode. This value can
appear in two ways: either the name of a specific
virtual device file, or an asterisk (*) followed
immediately by the device name. The latter case
refers to a virtual device that is in the
WIN386.EXE file. Filenames usually include the
.386 extension. Multiple device lines are required
to run Windows in 386 enhanced mode.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
Display=<filename-or-*devicename> (See "Device=", above)
Default: None (Setup assigns an appropriate value based on
your system configuration.)
Purpose: Specifies the display device that is being used
with Windows in 386 enhanced mode.
To change: Choose the Windows Setup icon from the Main
Group window.
===============================================================================
DMABufferIn1MB=<Boolean>
Default: No
Purpose: If enabled, Indicates that the direct memory
access (DMA) buffer memory should be in the first
1MB of memory (above 640K, if possible) in order
to be compatible with 8-bit bus master cards.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
DMABufferSize=<kilobytes>
Default: 16
Purpose: Specifies the amount of memory (in kilobytes) to
be reserved for the direct memory access buffer
(DMA). This memory will be allocated above 640K,
if possible. Windows in 386 enhanced mode will
default to a DMA buffer size that will handle disk
access.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
DOSPromptExitInstruc=<Boolean>
Default: Yes
Purpose: If enabled, when you start the MS-DOS prompt a
message box appears, with instructions on how to
exit and switch away from the MS-DOS prompt.
Disable this setting if you do not want to see the
message.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
DualDisplay=<Boolean>
Default: See "Purpose."
Purpose: Normally, when running in 386 enhanced mode, the
memory between B000:0000 and B7FF:000F is used by
the general system unless a secondary display is
detected. Enable this setting if you are using a
VGA-based color display and want EMM386.EXE to
include this address space as an upper memory
block (UMB). In addition to enabling this setting,
you must include the i= option in the
device=EMM386.EXE command line in your CONFIG.SYS
file as follows:
device=EMM386.EXE i=B000-B7FF
If this setting is disabled, the address range is
available on EGA systems, but not on VGA systems,
because the VGA display device supports monochrome
modes, which use this address space.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
EBIOS=<filename-or-*devicename> (See "Device=", above)
Default: None (Setup assigns an appropriate value based on
your system configuration.)
Purpose: Specifies the extended BIOS device that is being
used with Windows in 386 enhanced mode.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
EGA40WOA.FON=<filename>
Default: None
Purpose: Specifies the filename of the fixed-pitch display
font used for non-Windows applications with a
display of 40 columns and more than 25 lines.
To change: Quit Windows and run Setup from the MS-DOS
prompt. Change the Codepage or Display setting.
===============================================================================
EGA80WOA.FON=<filename>
Default: None
Purpose: Specifies the filename of the fixed-pitch display
font used for non-Windows applications with a
display of 80 columns and more than 25 lines.
To change: Quit Windows and run Setup from the MS-DOS
prompt. Change the Codepage or Display setting.
===============================================================================
EISADMA=<Boolean> or <channel>,<size>
Default: 0,8; 1,8; 2,8; 3,8; 5,16w; 6,16w; 7,16w (Each pair
goes with its own EISADMA setting.)
Purpose: Specifies the mode of operation of an extended DMA
channel for Extended Industry Standard
Architecture (EISA) machines only. This setting's
value can take one of two forms. If you disable
this setting, Windows will treat the machine as
non-EISA, therefore avoiding all EISA-related
logic. You can try disabling this switch if you
cannot run Windows in 386 enhanced mode on your
EISA machine. If you are using an EISA machine,
you can specify the default transfer size for one
or more DMA channels. The channels can operate in
the following modes: 8-bit (8), 16-bit specified
in words (16w), 16-bit specified in bytes (16b),
or 32-bit (32). If you are not using an EISA
machine, Windows will ignore this setting.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
EMMExclude=<paragraph-range>
Default: None
Purpose: Specifies a range of memory that Windows will not
scan to find unused address space. This has the
side effect of turning off the RAM and ROM search
code for the range. The range (two paragraph
values separated by a hyphen) must be between A000
and EFFF. This scanning can interfere with some
adapters that use the same memory area. The
starting value is rounded down and the ending
value is rounded up to a multiple of 16K. For
example, you could set EMMExclude=C800-CFFF to
prevent Windows from scanning the addresses
C800:0000 through CFFF:000F. You can specify more
than one range by including more than one
EMMExclude line.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
EMMInclude=<paragraph-range>
Default: None
Purpose: Specifies a range of memory that Windows will
treat as unused address space regardless of what
may be there. EMMInclude takes precedence over
EMMExclude if you specify ranges that overlap. The
range (two values separated by a hyphen) must be
between A000 and EFFF. The starting value is
rounded down and the ending value is rounded up to
a multiple of 16K. For example, you could set
EMMInclude=C800-CFFF to ensure that Windows can
use the addresses C800:0000 through CFFF:000F.
You may specify more than one range by including
more than one EMMInclude line.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
EMMPageFrame=<paragraph>
Default: None
Purpose: Specifies the starting paragraph where the 64K
page frame will begin when Windows in 386 enhanced
mode cannot find a suitable page frame. Allows an
EMM page frame in an area containing some unused
RAM or ROM. For example, you could set
EMMPageFrame=C400 to start the page frame at
C400:0000.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
EMMSize=<kilobytes>
Default: 65,536
Purpose: Specifies the total amount of memory available for
mapping as expanded memory. The default value
allocates the maximum possible amount of system
memory as expanded memory. Specify a value for
this setting if you run an application that \
allocates all of the available expanded memory. If
this is the case, you cannot create new virtual
machines. If this value is zero, then no expanded
memory will be allocated, but the EMM driver will
be loaded. To disable EMM and prevent the EMM
driver from loading, use the NoEMMDriver setting.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
FileSysChange=<Boolean>
Default: Off in 386 enhanced mode; Not supported in
standard mode.
Purpose: Indicates whether File Manager automatically
receives messages anytime a non-Windows
application creates, renames, or deletes a file.
If disabled, a virtual machine can run
exclusively, even if it modifies files. Enabling
this setting can slow down system performance
significantly.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
Global=<device-name>
Default: (all devices)
Purpose: Defines DOS devices loaded in CONFIG.SYS that need
to be global to the system. The default setting
for all devices is global. However, certain
virtual devices might specify that a DOS device be
local (for example, MS$MOUSE). Use this setting to
override that local specification. The <device-
name> value must exactly match the case of the
device name, or setting will not work. (Most
device names are in all capital letters, therefore
this value must usually be in all caps.)
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
HardDiskDMABuffer=<kilobytes>
Default: 0 for AT architecture computers; 64 for micro-
channel computers or computers that use Direct
Memory Access (DMA) channel 3 (unless you are
using SMARTDrive and double-buffering is turned
on. In this case the default is 0.)
Purpose: Specifies the amount of memory used for the DMA
buffer. If you are using SMARTDrive and double-
buffering is turned on, this amount is determined
automatically. You may need to change this value
if you are using a hard disk that supports DMA and
are not using SMARTDrive, or if you do not have
double-buffering turned on.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
IdleVMWakeUpTime=<seconds>
Default: 8
Purpose: Causes timer interrupts to periodically "wake up"
idle virtual machines after the specified number
of seconds have elapsed. If a virtual machine does
not use timer interrupts (Int 8 or Int 1Ch),
Windows will not usually force timer interrupts
into a virtual machine unless it is active. This
setting forces the timer interrupts to occur. The
value for this setting is rounded down to
the lowest power of two (for example, 1, 2, 4, 8,
16, 32, 64).
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
IgnoreInstalledEMM=<Boolean>
Default: No
Purpose: If enabled, Windows will start in 386 enhanced
mode, even when there is an unknown expanded
memory manager (EMM) running. This can cause the
system to fail if memory-resident software was
using EMM before Windows was started. Enable this
setting only if no such software is installed or
you are sure will not be active when you are
running Windows. This setting applies only to
expanded memory managers servicing physical EMS
hardware; Windows will not disable unrecognized
80386 expanded memory emulators.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
InDOSPolling=<Boolean>
Default: No
Purpose: If enabled, prevents Windows from running other
applications when memory-resident software has the
InDOS flag set. Enabling this setting is necessary
if the memory-resident software needs to be in a
critical section to do operations off an INT21
hook, but will slow down system performance
slightly.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
INT28Critical=<Boolean>
Default: True
Purpose: Specifies whether a critical section is needed to
handle INT28h interrupts used by memory-resident
software. Some networks do internal task switching
on INT28h interrupts. These interrupts might hang
some network software, indicating the need for an
INT28h critical section. If you are not using such
software, you might improve Windows' task
switching by disabling this setting.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
IRQ9Global=<Boolean>
Default: No
Purpose: If enabled, converts IRQ9 masks to global. Enable
this setting if your system hangs when accessing a
floppy drive. Or make sure your system accesses
the floppy drive before starting Windows.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
Keyboard=<filename-or-*devicename> (See "Device=", above)
Default: None (Setup assigns an appropriate value based on
your system configuration.)
Purpose: Specifies the keyboard driver that is being used
with Windows in 386 enhanced mode.
To change: Choose the Windows Setup icon from the Main
Group window.
===============================================================================
KeyBoostTime=<seconds>
Default: .001
Purpose: Specifies the amount of time (in seconds) an
application runs with increased priority when it
receives a keystroke. You can use this setting to
increase the response to keystrokes when several
background applications are running.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
KeyBufferDelay=<seconds>
Default: .2
Purpose: Specifies the amount of time (in seconds) to delay
pasting keyboard input after the keyboard buffer
is full. Some applications might require more than
.2 seconds.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
KeyIdleDelay=<seconds>
Default: .5
Purpose: Specifies how much time Windows ignores idle calls
after simulating a keystroke into a virtual
machine. You can set this value to 0 to speed up
keyboard input, but some applications might slow
down significantly.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
KeyPasteCRSkipCount=<number>
Default: 10
Purpose: Specifies the number of times that a read status
INT 16 call should return a status of empty for
the keyboard buffer after pasting a carriage
return before pasting another character. When
Windows pastes information from the Clipboard to a
non-Windows application, it must first paste the
information to the BIOS keyboard buffer before
pasting it into the application. This setting is
used to slow down fast pasting from the Clipboard
to the keyboard buffer so that the application can
handle all incoming characters from the buffer. If
you seem to lose characters, or if the screen does
not update often enough while pasting information
from the Clipboard, increase this value. This
setting is related to KeyPasteSkipCount.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
KeyPasteDelay=<seconds>
Default: .003
Purpose: Specifies how much time (in seconds) to wait
before pasting any characters after a key has been
pasted. Some applications might require more time
than .003 seconds for recognition of a keystroke.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
KeyPasteSkipCount=<number>
Default: 2
Purpose: Specifies the number of times that a read status
INT 16 call should return a status of empty for
the keyboard buffer before pasting another
character. When Windows pastes information from
the Clipboard to a non-Windows application, it
must first paste the information to the BIOS
keyboard buffer before pasting it into the
application. This setting is used to slow down
fast pasting from the Clipboard to the keyboard
buffer so that the application can handle all
incoming characters from the buffer. If you seem
to lose characters, or if the screen does not
update often enough while pasting information from
the Clipboard, increase this value. This setting
is related to KeyPasteCRSkipCount
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
KeyPasteTimeout=<seconds>
Default: 1
Purpose: Specifies how much time (in seconds) to allow an
application to make the necessary BIOS calls for
reading keyboard input before Windows will change
from the fast paste (INT16h) to the slow paste
(INT9h) mechanism.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
KybdPasswd=<Boolean>
Default: True for IBM PS/2 computers; False for all other
computers
Purpose: Specifies whether the virtual keyboard device
(VKD) should support PS/2 8042 commands that
implement password security. This setting only
applies to 8042 keyboard controllers that are
compatible with the PS/2 computer.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
KybdReboot=<Boolean>
Default: True
Purpose: If enabled, Windows will attempt to reboot the
computer using a keyboard controller command. On
some computers this method is unreliable. If your
computer hangs while rebooting, then disable this
setting. In this case, Windows will quit and then
display a prompt to press CTRL+ALT+DEL a second
time.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
Local=<device-name>
Default: None (In a standard SYSTEM.INI file, Setup will
set Local=CON. See "Purpose.")
Purpose: Defines MS-DOS device drivers that need to be
local to each virtual machine. The <device-name>
value must exactly match the case of the device
name, or this setting will not work. (Most device
names are in all capital letters, therefore this
value must usually be in all caps.) If a device
driver is local, a separate copy of it will exist
in each virtual machine, and each will keep
different state information. Most device drivers
will not function properly when this setting is
used. An exception is CON, the DOS console device,
which should be local to avoid filling a buffer
with input from multiple virtual machines.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
LocalLoadHigh=<Boolean>
Default: False
Purpose: Determines how extra memory in the UMB (Upper
Memory Block) area is used when Windows in running
on MS-DOS version 5.0. If disabled, then Windows
uses all of the UMB area, leaving no extra UMB
space available for Virtual Machines. If enabled,
then Windows does not use all of the extra UMB
area. In this case, UMB area is available locally
to each Virtual Machine.
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
LocalReboot=<on-or-off>
Default: On
Purpose: Specifies whether you can press CTRL+ALT+DEL to
quit applications that cause an unrecoverable
errors in 386 enhanced mode, without restarting
Windows. If this setting is enabled, you can quit
the applications. If this setting is disabled,
pressing CTRL+ALT+DEL will restart your entire
system (as it normally does.)
To change: Use Notepad to edit the SYSTEM.INI file.
===============================================================================
LPT1AutoAssign=<seconds>
LPT2AutoAssign=<seconds>
LPT3AutoAssign=<seconds>
LPT4AutoAssign=<seconds>
Default: 60
Note: These settings apply to Windows version 3.0 only. If
you have upgraded to Windows 3.1, these settings may
still appear in your SYSTEM.INI file, but will have
no affect.
===============================================================================
LRULowRateMult=<number>
Default: 10
Purpose: Specifies the value used for determining the low
paging rate sweep frequency. The low paging rate
sweep frequency is computed by multiplying the
value for LRUSweepFreq by the value specified for
this setting. Values between 1 and 65535 may be
used.
To change: Use Notepad to edit the SYSTEM.INI file. (You
should never need to change this setting).
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LRURateChngTime=<milliseconds>
Default: 10,000
Purpose: Specifies the length of time that the Memory
Manager stays at high rate with no paging before
switching to low rate, and the length of time the
Memory Manager stays at low rate with no paging
before turning the Least-Recently-Used (LRU) Sweep
off.
To change: Use Notepad to edit the SYSTEM.INI file. (You
should never need to change this setting).
===============================================================================
LRUSweepFreq=<milliseconds>
Default: 250
Purpose: Specifies the time between sweep passes. This is
also the high paging rate sweep frequency.
To change: Use Notepad to edit the SYSTEM.INI file. (You
should never need to change this setting).
===============================================================================
LRUSweepLen=<length-in-pages>
Default: 1024 (Windows computes this value by dividing the
value of LRUSweepReset by the value of
LRUSweepFreq)
Purpose: Specifies the length in pages of the region swept
on each pass. The value must be at least 1.
To change: Use Notepad to edit the SYSTEM.INI file. (You
should never need to change this setting).
===============================================================================
LRUSweepLowWater=<number>
Default: 24
Purpose: Specifies when the Least-Recently Used (LRU)
sweeper should be turned on. When the number of
free pages drops below this value, the sweeper is
turned on.
To change: Use Notepad to edit the SYSTEM.INI file. (You
should never need to change this setting).
===============================================================================
LRUSweepReset=<milliseconds>
Default: 500
Purpose: Specifies the time desired for an ACC bit reset
divided by 4 megabytes of pages. Therefore, the
time to reset all ACC bits is: (number of pages in
system+1023/1024) where 1024 pages = 4megabytes.
The minimum value is 100.
To change: Use Notepad to edit the SYSTEM.INI file. (You
should never need to change this setting).
===============================================================================
Reference(s):
Microsoft Windows Resource Kit 3.1, SYSTEM.INI file
Additional query words: 3.10 win31
======================================================================
Keywords :
Version : 3.10 3.11
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