System Resources

Below are default values for system resources. To see other, non-default possibilities, use the BIOS Setup utility (see page 3-26), 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 1-7. System Interrupts

0

System timer

1

Keyboard

2

Cascade IRQ 9

3

Free (or COM2 infrared port, if enabled)

4

COM1 (serial port)

5

Audio

6

Floppy drive

7

LPT1 (ECP parallel port)

8

Real-time clock

9

Free (OmniBook 4100/4150B)

 

Video (OmniBook 4150†)

10

USB and CardBus - assigned by Windows driver

 

Video Controller (OmniBook 4150B)

11

Free

12

Pointing device

13

Numeric data processor

14

Internal hard disk (primary IDE controller)

15

Internal CD-ROM drive (secondary IDE controller)

†Models called 4150† in this manual have no marking in the serial number, whereas models called 4150B have 4150 B after the serial number.

 

Table 1-8. System Memory

00000 - 9FFFF

System memory

A0000 - BFFFF

Video

C0000 - CBFFF

Video BIOS (OmniBook 4100/4150†)

C0000 - CFFFF

Video BIOS (OmniBook 4150B)

CC000 - DBFFF*

Free** (OmniBook 4100/4150†)

D0000 - DBFFF*

Free** (OmniBook 4150B)

DC000*- FFFFF

System BIOS

*Approximate boundary.

**Valid uses for memory addresses CC000-DBFFF or D0000-DBFFF: Upper memory blocks (UMBs).

PC card memory windows.

†Models called 4150† in this manual have no marking in the serial number, whereas models called 4150B have 4150 B after the serial number.

HP OmniBook 4100/4150

Product Information

1-7