Category : Network Files
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Filename : 1012660.TXT

 
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FYI

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TITLE: DOS Memory Managers and NetWare Lite v1.X
DOCUMENT ID#: FYI.P.6076
DATE: 04DEC92
PRODUCT: NetWare Lite
PRODUCT VERSION: All versions
SUPERSEDES: NA
LITE FAX DOC #: 2660


SYMPTOM

NA

ISSUE/PROBLEM

DOS Memory Managers and NetWare Lite v1.x

Note: Information listed in this document is intended for use on 386 or
486 based computers. For information on other machines, please consult
your DOS manual. This document is intended to aid the user in the basic
steps of loading NetWare Lite items into upper memory.

General Information

This basic summary is necessary to understand how to create the best
performing servers and clients with NetWare Lite.

Random Access Memory (RAM) in 386 and 486 computers has a uniform
structure. The first 640 KB of memory is known as conventional memory,
the location where applications load. The next 384 KB of memory is known
as upper memory, where system files and other files (such as mouse
drivers or network drivers) can be loaded if memory management software
is used. On machines with more than 1 MB of RAM, the first 64 KB of
memory above 1 MB is known as the High Memory Area (HMA).

NetWare Lite v1.0 has several files that may be loaded into upper memory.
These files are normally loaded from the STARTNET.BAT file found in the
NWLITE directory. These files are: LSL.COM, your network board driver
(such as NE2000.COM), IPXODI A, SHARE (found in your DOS directory) and
CLIENT.EXE. The proper syntax for loading these files into upper memory
depends on which version of DOS and memory manager you choose to use.
The following steps instruct you how to load NetWare Lite files into
upper memory by using memory managers from DR DOS 6.0 and MS DOS 5.0. If
you have any questions that are not answered in this document, please
consult your DOS documentation.

The memory manager, EMM386, will relocate software into upper memory.
Without the use of the EMM386 manager, the only memory that can be used
is conventional memory (the first 640 KB of memory).

DR DOS 6.0

The memory manager included with DR DOS 6.0 is EMM386.SYS. To load

drivers and programs into upper memory, several steps must be followed.

Note: EMM386.SYS cannot be used with other memory managers.

1. The following is an example of a CONFIG.SYS file that is configured
to allow access to upper memory (UMB) and HMA:

HIDOS=ON
DEVICE=C:\DRDOS\EMM386.SYS /F=AUTO /B=FFFF /R=AUTO
/E=[START-END]

HIDOS=ON

In the CONFIG.SYS file, the HIDOS=ON line should be included. This
allows the computer to put information into HMA if memory is
available.

EMM386.SYS
[/F=AUTO] Performs an automatic search through upper memory for a
free 64 KB window. This is the default.

[/B=FFFF] Relocates the DR DOS kernel, freeing space in conventional
memory for use by applications. By using the ffff
location of memory, the kernel will be placed into HMA (if
available).

[/R=AUTO] Copies data and code from Read Only Memory (ROM), which is
slow to run, into Random Access Memory (RAM), which is
very fast.

[/E=[START-END]] Excludes an area of upper memory from the area
being checked for availability of use. This
switch should be used if an item uses a specific
memory location. For example: If your network
board had a memory address setting of CC00 and
you used the switch [/E=CC00-CFFF], then the
EMM386.SYS driver would not allow any software
to occupy the same area of memory. This is a
solution to random errors (the machine lockup)
that may occur if the network board driver is
overwritten.

2. To load NetWare Lite required files into high memory in your
STARTNET.BAT file, your syntax should be similar to the following:

NetWare LITE v1.1 NetWare LITE v1.0
HILOAD LSL HILOAD LSL
HILOAD NE2000 HILOAD NE2000
HILOAD IPXODI A HILOAD IPXODI A
HILOAD SHARE HILOAD SHARE
HILOAD SERVER SERVER
HILOAD CLIENT HILOAD CLIENT

Note: Server should not be loaded into high memory with v1.0

3. To examine where your items are loaded into high memory, type the
following from the DOS prompt:

MEM /A /P

(/A shows all information. /P pauses at the end of every screen.)

4. From this screen you will be given several screens of information.
To determine what is located in upper memory, be aware that the
address A000:0000 is where conventional memory ends and upper memory
begins and FFFF:0000 is where upper memory ends and the high memory
area begins. For complete information on the MEM command, please
refer to page 258-259 of the DR DOS 6.0 User's Guide or call the DRI
Automated Fax system at 1-408-649-2344. The titles pertaining to
memory management are the following:

Document Title
1000 Master Index (A Complete Listing of all Files on the DRI
Fax System.)
1300 DR DOS 6 Memory Management overview
1301 Basic Memory optimization
1302 Trouble shooting
1303 Using Third-party memory managers
1305 XMS-EMS memory pool
1306 Preventing DR DOS from loading into HMA
1307 The MEM /A Command
1308 Gate A20 and Printing Problems

MS-DOS 5.0

The memory manager included with MS-DOS 5.0 is EMM386.EXE. To load
drivers and programs into upper memory, several steps must be followed.

In the CONFIG.SYS file, device drivers for HIMEM.SYS and EMM386.EXE must
be included and be placed in a specific order. To ensure the proper
setup, it is best to have the device line containing HIMEM.SYS at the
beginning of the CONFIG.SYS file. The second line should contain the
EMM386.EXE line, and the third line should contain a specification of
where to load the DOS system files. For example:

DEVICE=C:\DOS\HIMEM.SYS
DEVICE=C:\DOS\EMM386.EXE /X=MMMM-NNNN NOEMS
DOS=HIGH,UMB

HIMEM.SYS

Generally, the default specifications for HIMEM.SYS are sufficient
for your system. The main exception is the /MACHINE:XXXX
specification, where XXXX is your machine type. Please see page 611
in the MS-DOS 5.0 User's Guide for complete information.

EMM386.EXE

Switches included with EMM386.EXE that are most commonly used to
increase system performance are the following:

[X=[MMMM-NNNN]] The MMMM-NNNN denotes an address that EMM386.EXE
will not be allowed to use. This is very useful for excluding the
address of your network-board driver so it will not be overwritten
by DOS. (If the board memory address is set at CC00, the switch
would be X=CC00-CFFF.)

[NOEMS] Allows access to upper memory and prevents access to
expanded memory. It does allow access to extended memory. Other
switches can be found in the MS-DOS 5.0 User's Guide on pages
605-609.


DOS

The HIGH switch allows DOS to relocate the system files into a
location called the HMA (High Memory Area), freeing up more
conventional memory space. The UMB (Upper Memory Block) switch is
for linking conventional memory with upper memory. It is necessary
to load drivers or devices into upper memory.

Remember, to load any command high, the line must follow the three
lines listed above. The command to load a device high in the
CONFIG.SYS file is DEVICEHIGH. The command to load an item high in
the AUTOEXEC.BAT file or any .BAT file is LH or LOADHIGH.

To load the required NetWare Lite files into high memory in your
STARTNET.BAT file, your syntax should be similar to the following:

NetWare LITE v1.1 NetWare LITE v1.0
LH LSL LH LSL
LH NE2000 LH NE2000
LH IPXODI A LH IPXODI A
LH SHARE LH SHARE
LH SERVER SERVER
LH CLIENT LH CLIENT

Note: Server should not be loaded into high memory with v1.0

To examine where your items are loaded into high memory, from the
DOS prompt type the following:

MEM /C |MORE

(/C classifies programs by memory usage. It also displays
conventional memory and upper memory in separate blocks to easily
determine where programs are loaded; the |MORE command pauses at the
end of every screen.)

For further questions and concerns about loading software into upper
memory, consult the MS-DOS 5.0 User's Guide.

SOLUTION

NA


  3 Responses to “Category : Network Files
Archive   : NOVELFAX.ZIP
Filename : 1012660.TXT

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