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Miscellaneous Technical Information
95
IRQ Assignments
✍ This shows the factory default values. Windows 98 will reassign resources to best meet
the needs of a particular configuration. PCI IRQs can be shared between several PCI
devices.
IRQ # Default Assignment
0 System timer
1 Standard 101/102-key or Microsoft
®
Natural Keyboard
2 Programmable interrupt controller
3LT WinModem NV #3
4 Communications port (COM1)
5 Shared between IRQ holder for PCI steering, ES1938 PCI AudioDrive,
and ES1938 AudioDrive device manager
6 Standard diskette drive controller
7 Printer port (LPT1)
8 System CMOS/real time clock
9 Shared between IRQ holder for PCI steering and Intel 82371AB/EB
PCI-to-USB Universal Host Controller
10 Open
11 Shared between IRQ holder for PCI steering and Rage Pro Turbo 1X
(English) (DirectX)
12 PS/2-compatible mouse port
13 Numeric data processor
14 Shared between primary IDE controller (dual FIFO) and Intel
82371AB/EB PCI bus master IDE controller
15 Shared between secondary IDE controller (dual FIFO) and Intel
82371AB/EB PCI bus master IDE controller