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. To see other, non-default possibilities, use the BIOS Setup utility (see page 3-24), which lists port and audio device configurations in the System Devices menu. 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 900B) Video (OmniBook 900†) 10 USB and CardBus - assigned by Windows driver Video Controller (OmniBook 900B) 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 900† in this manual have no marking in the serial number, whereas models called 900B have 900 B after the serial number. Table 1-8.
System Memory 00000 - 9FFFF System memory A0000 - BFFFF Video C0000 - CBFFF C0000 - CFFFF Video BIOS (OmniBook 900†) Video BIOS (OmniBook 900B) CC000 - DBFFF* D0000 - DBFFF* Free** (OmniBook 900†) Free** (OmniBook 900B) 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 900† in this manual have no marking in the serial number, whereas models called 900B have 900 B after the serial number. HP OmniBook 900 Product Information 1-7