HP 4100 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 3-23), 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	Crystal sound
6	Floppy drive
7	LPT1 (ECP parallel port)
8	Real-time clock
9	Free
10	USB and CardBus - assigned by Windows driver
11	Free
12	Pointing device
13	Numeric data processor
14	Internal hard disk (primary IDE controller)
15	Internal CD-ROM drive (secondary IDE controller)

	Table 1-8. System Memory
00000 - 9FFFF	System memory
A0000 - BFFFF	Video
C0000 - CBFFF	Video BIOS
CC000 - DBFFF*	Free**
DC000*- FFFFF	System BIOS

*Approximate boundary.

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

PC card memory windows.

HP OmniBook 4100 Product Information 1-7