Dell Inspiron 3800 - Manual (Page 20)

IRQ Line Assignments
Problems can arise if two devices attempt to use the same interrupt request (IRQ) line. To avoid this type of conflict, check the documentation for
the default IRQ line setting for each installed device. Then consult
Table 3 to configure the device for one of the available IRQ lines.
To view IRQ line assignments in Windows 98, click the Start button, point to Settings, and click Control Panel. Double-click the System icon.
Select the Device Manager tab, and then double-click Computer.
To view IRQ line assignments in Windows 2000, click the Start button, point to Settings, and click Control Panel. Double-click the System icon.
Select the Hardware tab, and then click Device Manager. Click View, and then click Resources by connection. Double-click Interrupt
request (IRQ) to view the IRQ assignments.
Table 3. IRQ Line Assignments
Memory
Memory Allocations
Table 4 provides a map of the conventional memory area. When the microprocessor or a program addresses a location within the conventional
memory range, it is physically addressing a location in main memory.
To view memory allocations in Windows 98, click the Start button, point to Settings, and click Control Panel. Double-click the System icon.
Click the Device Manager tab, and then double-click Computer.
To view memory allocations in Windows NT, start the Windows NT Diagnostics in the Administrative Tools (Common) folder.
To view memory allocations in Windows 2000, click the Start button, point to Settings, and click Control Panel. Double-click the System icon.
Click the Hardware tab, and then click Device Manager.
Table 4. Conventional Memory Map
1600 x 1200 (32 bit) 8 8 -- --
NOTE: Installed devices cannot share the same COM port address. The default address of your computer's serial port is
COM1.
IRQ
Line
Reserved/Available
IRQ0 Reserved; generated by the system timer
IRQ1 Reserved; generated by the keyboard controller to signal that the keyboard output buffer is full
IRQ2 Reserved; generated internally by the interrupt controller to enable IRQ8 through IRQ15
IRQ3 Available for use by a PC Card unless the integrated serial port or infrared port is configured for COM2 or COM4
IRQ4 Available for use by a PC Card unless the integrated serial port or infrared port is configured for COM1 (the default) or COM3
IRQ5 Available for use by the audio controller
IRQ6 Generated by the diskette drive controller to indicate that the diskette drive requires the attention of the microprocessor
IRQ7 Available for use by a PC Card or audio controller if the parallel port is disabled
IRQ8 Reserved; generated by the system input/output (I/O) controller's real-time clock (RTC)
IRQ9 Reserved; generated by the video controller
IRQ10 Available for use by a PC Card or audio controller unless the APR is attached
IRQ11 Generated by USB, PC Card, and audio controllers; available for use by a PC Card
IRQ12 Reserved; generated by the keyboard controller to indicate that the output buffer of the DualPoint integrated pointing device or the
external PS/2 mouse is full
IRQ13 Reserved; generated by the math coprocessor
IRQ14 Reserved; generated by the hard-disk drive to indicate that the drive requires the attention of the microprocessor
IRQ15 Reserved; generated by the CD-ROM drive in the media bay to indicate that the drive requires the attention of the microprocessor
Address Range Use
0000h-003FFh Interrupt vector table
00400h-00FFFF BIOS data area