Product Descriptions (2524)

Product Descriptions

The computer has the following standard features:

The computer has the following external indicators, controls, connectors, and ports.

The Port Replicator has the following external connectors.


The following options are available for the computer:

Option Compatibility

The computer has no internal expansion slots to accept standard PC or PS/2 adapters.


The following accessories are available for the computer:

Component Descriptions

The system logic boards contain the system board, CPU card, and memory card. The microprocessor and associated circuitry make the computer functionally equivalent to the IBM Personal Computer AT with the following improvements:


The microprocessor interprets and carries out instructions. The SL Enhanced Intel® 486DX4 microprocessor is a 32-bit processor and operates in real-address mode and virtual-address (protected) mode.

RT / CMOS RAM and Battery

The real-time complementary metal-oxide semiconductor (RT/CMOS) RAM provides 128 bytes of storage. The real-time clock uses 14 bytes of this storage to track the date, time, and battery level. The remaining 114 bytes are assigned to store system configuration and security information.

The stored data in the RT / CMOS RAM is kept active by the backup battery when the system power is not on. If the stored data is lost due to a depleted backup battery, start the Utility Program's Setup Menu


The 256 KB of erasable programmable read-only memory (EPROM) contains the power-on self-test (POST). Easy Set-up and BIOS. The routines for performing the diagnostics tests are also contained in the EPROM.

Power Management System

The power management system controls the power applied to the computer by using the setup Program's Power Save menu. This system reduces the power drain on the battery when the computer power is on, but not actively being used.

Suspend and Resume Modes: 
The suspend and resume modes are unique methods to minimize the use of power from the battery. When the computer enters suspend mode, one beep sounds and the Power-ON indicator glows blinking orange. All tasks are stopped and their present states are stored in memory to save power.

When the computer returns to resume mode, the computer restores the same states as when it entered suspend mode. One beep sounds and the indicator glows on steady green when the resume operation is completed.


The LCD supports a maximum of 640 by 480 pels in text and graphic mode. The LCD can display 16 shades of gray at one time. The LCD control logic provides the LCD support functions which include bias voltage, backlight (brightness) control, and contrast control.

Digitizer Control

The digitizer control provides processing of digitizer data and communications support to the microprocessor. The controller supports detecting the movement of the electro magnetic pen . The click signal of the pen is also included in the data for further software processing.

ThinkPad File (TPF) Card

The TPF card is functionally equivalent to a hard-disk drive. However, the TPF card utilizes flash-memory for data storage. The TPF is rugged, noiseless, and uses very little power.

IC Card Controller

The IC Card controller is integrated on the system board and can accommodate three cards at the same time. The slots conform to the PCMCIA Type 2 and JEIDA V4.1.

Diskette Drive Controller

The controller connects to the diskette drive through one 26-pin cable connector on the port replicator. Signals and voltages are supplied through the connector to the drive. These signals and voltages can operate the computer's 3.5-inch external diskette drive.

Serial Port

The serial port is fully programmable and supports asynchronous communications. The 9-pin, D-shell connector on the port replicator provides the signals to drive a standard EIA-232D device and is assignet a port number by using setup screen.

Parallel Port

The parallel port allows the attachment of devices that accept eight bits of parallel data at standard transistor-transistor logic (TTL) levels. The port can be used as a general input and output port for any device or application that matches its input and output capabilities, it has a 25-pin, D-shell connector on the port replicator and is designed primarily for printers.

IBM PS/2 Enhanced Keyboard connector

The keyboard connector is located on the front of the port replicator and accepts a PS/2 Enhanced keyboard.

External CRT connector

The CRT connector on the port replicator is used to connect an external CRT.

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