Diskette Drive Interface; Serial Port; Parallel Port; System Security - Compaq DESKPRO 2000 SERIES Maintenance & Service Manual

1.3.12 Diskette Drive Interface

The diskette drive interface is 8477 compatible and supports two storage devices (diskette or tape
drive).

1.3.13 Serial Port

The serial port is RS-232C compatible.

1.3.14 Parallel Port

The following parallel support modes are supported:
SPP (Bidirectional Standard Parallel Port)
EPP (Enhanced Parallel Port)
ECP (Extended Capabilities Port)

1.3.15 System Security

The system BIOS provides a power-on password option that is enabled through the Setup program. The
computer includes a cable lock provision that makes it possible to lock the computer cover in place to
prevent unauthorized access to the system jumpers and other internal components (a padlock is not
included). For more information on this and additional security features, refer to Chapter 2,
"Troubleshooting," and Chapter 7, "Compaq Utilities."

1.3.16 Keyboard/Mouse Controller

The onboard 8042 I/O controller stores the keyboard and mouse controller code. Connectors for the
keyboard and mouse are located on the back panel.

1.3.17 Real-Time Clock and CMOS RAM

The onboard I/O controller provides a real-time clock and CMOS RAM. Chapter 5 provides
information about installing a new battery.
You can set the time for the clock and the CMOS values by using the Setup program described in
Chapter 7, "Compaq Utilities."

1.3.18 Power Supply Fan

For cooling, a fan is attached to the power supply at the rear of the computer chassis. This fan draws air
in through the front of the chassis and exhausts air out the rear of the chassis. This provides air flow
across the processor.

1.3.19 Speaker

An internal piezo speaker is mounted on the system board. The speaker provides audible error code
information (beep codes) during the power-on self-test (POST) and as required by the software. See
Chapter 2, "Troubleshooting," for beep code information.
1-10 Product Description