Operating the OmniBook
Software System Resources
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Software System Resources
Below are default values for the system resources. To see other,
non-default possibilities, refer to the BIOS Setup utility, which lists port
and audio device configurations in the Input/Output menu.
System Resources
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.
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 Video Controller (unmarked models*)
Free (“900 B” models*)
10 USB and CardBus - assigned by Windows driver
Video Controller (“900 B” models*)
11 Free
12 Pointing device
13 Numeric data processor
14 Internal hard disk (primary IDE controller)
15 Internal CD-ROM drive (secondary IDE controller)
* Unmarked models have no “900” after the serial number,
“900 B” models have “900 B” after the serial number.
System Memory
00000 - 9FFFF System memory
A0000 – BFFFF Video
C0000 - CBFFF
C0000 - CFFFF
Video BIOS (unmarked models)
Video BIOS (“900 B” models)
CC000 - DBFFF*
D0000 - DBFFF*
Free** (unmarked models)
Free** (“900 B” models)
DC000*- FFFFF System BIOS
* Approximate boundary.
** Valid uses for memory addresses CC000-DBFFF or D0000-DBFFF:
Upper memory blocks (UMBs).
PC card memory windows.
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