220 Hardware Problems
VX5 Reference Guide E-EQ-VX5RG-G-ARC
IRQ Assignments
The VX5 has 16 IRQs, numbered 0 through 15, many of which are already assigned as follows:
IRQs Device(s) Windows 2000 Device(s) Windows XP
IRQ0 Timer Output Timer Output
IRQ1 Keyboard Keyboard
IRQ2 Programmable Interrupt Controller Programmable Interrupt Controller
IRQ3 Serial Port COM2
2
Serial Port COM2
2
IRQ4 Serial Port COM1 Serial Port COM1
IRQ5 Not Used Not Used
IRQ6 Not Used Not Used
IRQ7 Cisco Radio Card Summit Radio Card
Symbol Radio Card
IRQ8 Real Time Clock Real Time Clock
IRQ9 PCI to USB Controller PCI to USB Controller
Cisco Radio Card
IRQ10 Reserved (default PC Card events) Reserved (default PC Card events)
IRQ11 PCMCIA controller
Symbol Radio Card
PCMCIA controller
IRQ12 Not Used Not used
IRQ13 Numeric data processor Numeric data processor
IRQ14 Primary IDE Controller Primary IDE Controller
IRQ15 Not used Secondary IDE Controller
Note: Please note that the IRQ assignments may change if additional hardware is added.
If additional hardware is added and no IRQs are available, it may be necessary to disable certain
devices in the BIOS to free up IRQs for the new hardware.
IRQ usage Notes:
• Serial ports (COM1 or COM2) may be disabled in the BIOS or via Windows freeing
up the specified IRQ for other uses.
• When the parallel port is disabled, IRQ7 is available for the radio. The parallel port
is disabled by default. However, some radios may use IRQ9 instead of IRQ7.
2
COM2 is labeled “COM2/3”.
