IBM PC 300GL Type 6563, Руководство пользователя

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Line/Headphone out
This jack is used to send audio signals from the computer to external
devices, such as powered stereo speakers with built-in amplifiers,
headphones, multimedia keyboards, or the audio line-in jack on a stereo
system.
Note: The internal speaker in your computer is disabled when an external
speaker is connected to the headphone connector on your computer.
Audio line in
This jack is used to accept audio signals from external devices (such as line
output from a stereo, television, or musical instrument) into the computer
sound system.
Microphone
This jack is used to connect a microphone to your computer when you want
to record voice or other sounds on the hard disk. This jack can also be
used with speech recognition software.
Note: If you experience interference or speaker feedback while recording,
try reducing the microphone recording volume (gain).
Procedures for recording and playing back sound vary by operating system.
See your operating system documentation for information and instructions.
Updating system programs
System programs are the basic layer of software built into your computer.
They include the power-on self-test (POST), the basic input/output system
(BIOS) code, and the Configuration/Setup Utility program. POST is a set of
tests and procedures that is performed each time you turn on your
computer. BIOS is a layer of software that translates instructions from other
layers of software into electrical signals that the computer hardware can
understand. You can use the Configuration/Setup Utility program to view
and change the configuration and setup of your computer.
Your computer system board has a module called electrically erasable
programmable read-only memory (EEPROM, also referred to as flash memory).
You can easily update POST, BIOS, and the Configuration/Setup Utility
program by starting your computer using a flash update diskette or by
using the Remote Administration feature, if it is enabled. See “Setting
Remote Administration” on page 51 for more information.
As part of the continuing work to improve quality, IBM might make
changes and enhancements to the system programs. When updates are
released, they are available as downloadable files on the World Wide Web.
Chapter 3. Operating and caring for your computer
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