Software System Resources; System Interrupts; System Memory; Dma Channels - HP OmniBook XE User Manual

Software System Resources

The tables on this page 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. To see other, nondefault possibilities, refer to the BIOS Setup utility, which lists port and
audio device configurations in the Advanced menu.

System Interrupts

0 System timer
1 Keyboard
2 Cascade from secondary interrupt controller
3 Free (or COM2, IrDA port, if enabled)
4 COM1 (serial port)
5 Audio
6 Floppy disk drive
7 LPT1 (ECP parallel port)
8 Real-time clock
9 Free in APM mode (SCI in ACPI mode)
10 PCI IRQ (shared by all PCI devices)
11 Free (or MIDI, if enabled).
12 Touch pad, PS/2 mouse
13 Numeric coprocessor
14 Internal hard disk drive (primary IDE controller)
15 Internal CD-ROM drive (secondary IDE controller)

System Memory

00000 - 9FFFF System memory
A0000 – BFFFF Video
C0000 - CFFFF Video BIOS
D0000 - DBFFF Free (valid uses: upper memory blocks (UMBs) or PC Card memory windows)
DC000 - FFFFF System BIOS
System Input/Output Addresses (100-3FF)
170-177 Internal CD-ROM drive (secondary IDE controller)
1F0-1F7 Internal hard disk drive (primary IDE controller)
220-22F DOS games (FM decoding)
376 Internal CD-ROM drive (secondary IDE controller)
378-37F LPT1 (printer port)
388-38B DOS games (FM decoding)
3B0-3BB VGA adapter
3C0-3DF VGA adapter
3E0-3E1 PCMCIA controller
3F0-3F5 Floppy disk drive controller
3F6 Internal hard disk drive (primary IDE controller)
3F7 Floppy disk drive controller
3F8-3FF COM1 (serial port)

DMA Channels

0 Free
1 LPT1 (ECP parallel port)
2 Floppy disk drive
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