Intermec 6200 참조 가이드

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The following paragraphs describe the various methods that boot the PEN*KEY

handĆheld computer.  Also described are the options that are possible during the

boot process, which you exercise by holding a key down during the boot phase or

by reconfiguring a CMOS setting.

A cold boot cycle is one of the first steps taken when the computer is first

received.  A cold boot is defined as a boot cycle in which power is applied for the

first time (that is, the computer contains no backup battery or main battery and

no external power is being applied).  Normally you start the cold boot cycle by

installing the main battery.  You can also initiate a cold boot by taking the

computer with no batteries, and inserting into a dock.  The following paragraphs

describe a few of the basic steps that occur during a cold boot.

As one of the first steps, the BIOS copies itself, the video BIOS, and ROM DOS 5

into the first megabyte of system memory and then writeĆprotects that memory.

This is known as BIOS shadowing.  The RAM used in this process is called

shadow RAM.  Shadow RAM is different from conventional memory in that a

hardware mechanism prevents the shadow RAM from being modified once code

is copied there.  BIOS code is copied into shadow RAM primarily to enhance

performance.  Running from system memory is faster than running from flash

memory directly.

A series of tests is performed on the hardware to ensure that the system is

functioning properly.  For the most part, these tests are performed without any

indication that they are running.  If a test fails, an error message is displayed on

the screen or a series of beeps is sent to the speaker.  The beep codes are used

only for those errors that might occur before the screen can be enabled.  For a

description of all the beep codes that may be generated, see Audible Error Codes,

later in this section.

Early in the POST phase, the video BIOS is given control to initialize the screen.

From that point on, errors are reported by messages on the screen rather than

by beeps.

Once the screen is enabled, version numbers are displayed for the ROM BIOS

and any other hardware components that have version designations that can be

read by software.