Texas-instruments TravelMate 2000 User Manual download pdf (Page 16)

The Hardware

RAM

RAM (Random Access Memory) stores data and application software for the processor. You can write to or read

from RAM freely, but once the power is turned off, the data in RAM is lost. RAM size is described by the amount of

information (bytes) it can store. Symbols often used for this are "K" and "M". One K byte 1 K byte) represents 1024

bytes and one M byte (1 M byte) represents 1024 K bytes. The TravelMate 2000 has a standard RAM size of 1 M

byte. This can be increased to 3 M byte by installing two optional 1 M byte RAM cards.

ROM

ROM (Read-Only Memory) contains factory-programmed information, which remains stored even with the power off.

You can never change the contents of ROM. The TravelMate 2000 has two ROM areas. One stores the IPL (Initial

Program Loader), BIOS (Basic Input/Output System), and setup and hardware installation functions. These programs

are sometimes referred to as firmware. The other ROM area stores the diagnostics program, LapLink program, and

the operating system, MS-DOS 4. 0 1. This area is called a ROM disk and is used to install MS-DOS on the hard disk.

Keyboard

You communicate with the computer by typing on the keyboard. Many of the keys work just like those on a regular

typewriter. However, as you will see, some of the keys have special functions not available on a typewriter. The

TravelMate 2000 keyboard is modeled after the IBM 10l/ 102 -key enhanced keyboard layout.

Taking a First Look 1-5

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Texas-instruments TravelMate 2000 User Manual Page 16