Dell Latitude LM Operator's manual

P/N 89180 Rev. A01 June 1997 ®
www.dell.com
Dell
®
Latitude
®
LM
Documentation Update
T
his document updates information contained in the
online Dell Latitude LM User’s Guide and the Dell
Latitude LM Reference and Troubleshooting Guide.
N
ew Microprocessor Options
The Dell Latitude LM is now available with a
166-megahertz (MHz) or 133-MHz Intel®Pentium®
microprocessor with MMX™technology.
Current application programs not designed specifically
for MMX technology should have a small improvement
in performance when run on a system with a Pentium
microprocessor with MMX technology. Software written
specifically to take advantage of MMX technology
(which will be labeled “Designed for Intel MMX”) will
have a greater improvement in performance, depending
on the type of application program.
The Pentium microprocessor with MMX technology has
twice the internal cache memory (32 kilobytes [KB]) as
the standard Pentium microprocessor.
To see the technical specifications of the new micro-
processors, search on “microprocessor specifications” in
the online System User’s Guide. The online guide is in
the Dell Accessories folder or program group.
N
ew Memory Module Support
The Dell Latitude LM now supports 32-megabyte (MB)
memory modules. With the 8 MB of standard non-
removable memory on the system board and two 4-MB
memory modules standard with every Latitude LM, the
computer now supports a maximum of 72 MB of system
memory. The following memory module combinations
are possible:
•24 MB — Install two 8-MB memory modules.
•40 MB — Install two 16-MB memory modules.
•72 MB — Install two 32-MB memory modules.
N
ew Memory Specifications
The Dell Latitude LM now supports extended-data out
(EDO) memory. EDO memory technology improves per-
formance over fast-page-mode technology by using a
shorter page-mode cycle time while accessing data
within a single page of memory. See the following table
for the updated memory specifications.

N
ew Video Controller
The Dell Latitude LM’s standard video subsystem now
includes 1.1 MB of video memory. For more information
about new video modes and resolutions, see “Using the
Display,” or search on “text modes” and “graphics
modes” in the online System User’s Guide.
To see the technical specifications of the new video sub-
system, search for “video specifications” in the System
User’s Guide. The online guide is in the Dell Accessories
folder or program group.
S
etup Program Changes
The following information updates Chapter 2, “Custom-
izing System Features,” in the Reference and
Troubleshooting Guide:
•The default setting for the AC POWER SAVE option in
the Power menu is OFF.
•The ALARM RESUME TIME option in the Power menu
tells the computer an exact time to resume normal
operation when it is in suspend mode.
Memory
Architecture. . . . . . . EDO
Memory module
capacities. . . . . . . . . 4, 8, 16, and 32 MB; must be
installed in matched pairs
(two 4-MB modules, two
8-MB modules, two 16-MB
modules, or two 32-MB
modules). Both EDO and
fast-page-mode modules are
supported in matched pairs.
Standard RAM . . . . 16 MB; 8 MB on system
board and two 4-MB EDO
memory modules installed
Maximum RAM . . . 72 MB
Memory access time:
tRAC . . . . . . . . 60 ns
tCAC . . . . . . . . 15 ns
BIOS address . . . . . F000:0000
NOTE: For the full name of an abbreviation or acronym used
in this table, see the Glossary in the online System User’s
Guide.

Figure 1. Main Screen of the Dell Diagnostics
D
ell Diagnostics Changes
This section updates Chapter 4, “Running the Dell Diag-
nostics,” in the Reference and Troubleshooting Guide.
Main Screen
The main screen of the diagnostics (see Figure 1) has
been revised to show more detail in the System Configu-
ration area.
Test Limits Under Main Menu Options
In the Test Limits option, press the <PAGE DOWN>key to
select the next menu or submenu in the Test Limits cate-
gory. Press the <ESC>key to return to the main Test
Limits menu.
RAM
System Set
Video
Keyboard
Mouse
Diskette Drives
Hard-Disk Drives (Non-SCSI)
IDE CD ROM Drives
Serial/Infrared Ports
Parallel Ports
SCSI Devices
Network Interface
Audio
* On the Dell Latitude LM, a CD-ROM drive installed in the options bay is recognized as IDE Drive 1.
Dell Computer Corporation
Dell Latitude LM Diagnostics Version
X.XX
Processor(s) Pentium MMX
Memory 16 MB
Secondary Cache 256
Video SVGA,1.1 MB
Keyboard 101 Key
Diskette Drive(s) A:1.4MB,B:NONE
Pointing Device Integrated
Parallel Ports 1
Mouse Integrated
Modems None
SCSI Devices None
Network Interface None
Serial/IR Ports Integrated
IDE(0) 809MB, 1571 Cyl, 16 Hd, 63 Sec
IDE(1)* None
USB(0) None
System Configuration
Available Test Groups
Main: Run seLect Subtest Options Test_limits About Key_help Quit
Display the Run Menu. Press Q to Quit

USB Subtests Added
The following subtests have been added to the System
Set Test Group. These subtests run only if the computer
has a Universal Serial Bus (USB) connector.
•The USB Register Test checks the onboard registers
of the USB interface. This subtest does not test USB
peripherals.
•The USB Memory Structure Test monitors the abil-
ity of a USB controller to process a simple set of
memory-resident instructions.
G
etting Help
Many of the telephone numbers in Chapter 5, “Getting
Help,” of the Reference and Troubleshooting Guide have
changed.
Use the most up-to-date numbers, which are in the “Call-
ing Dell” section of the online System User’s Guide. The
System User’s Guide is in the Dell Accessories folder or
program group.
____________________
 1997 Dell Computer Corporation. All rights reserved. Printed in the U.S.A.
Information in this document is subject to change without notice.
Trademarks used in this text: Dell, the DELL logo, and Latitude are registered trademarks of Dell Computer Corporation; Intel and Pentium are regis-
tered trademarks and MMX is a trademark of Intel Corporation. Other trademarks and trade names may be used in this document to refer to either the
entities claiming the marks and names or their products. Dell Computer Corporation disclaims any proprietary interest in trademarks and trade names
other than its own.