HP book XE2 manual System Resources, System Interrupts, System Memory

System Resources

Below are default values for system resources. To see other, non-default possibilities, use the BIOS Setup utility (see page 3-22), which lists port and audio device configurations in the System Devices menu.

The tables in this section show typical resource usage as set up by the OmniBook BIOS. Plug-and- play operating systems, drivers, and BIOS Setup settings may change some of the entries.

Table 1-5. System Interrupts

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

System timer

Keyboard

Cascade from secondary interrupt controller

Free (or COM2, IrDA port, if enabled)

COM1 (serial port)

Audio

Floppy disk drive

LPT1 (ECP parallel port)

Real-time clock

Free in APM mode (SCI in ACPI mode)

PCI IRQ (shared by all PCI devices)

Free (or MIDI, if enabled).

Touch pad, PS/2 mouse

Numeric coprocessor

Internal hard disk drive (primary IDE controller)

Internal CD-ROM drive (secondary IDE controller)

Table 1-6. System Memory

00000 - 9FFFF

A0000 – BFFFF

C0000 - CFFFF

D0000 - DBFFF

DC000 - FFFFF

System memory

Video

Video BIOS

Free (valid uses: upper memory blocks (UMBs) or PC Card memory windows)

System BIOS

1-8 Product Information HP OmniBook XE2