Dell PP01S technical specifications Memory Allocations, IRQ6

Error Messages, IRQs, and Memory Assignments: Dell Latitude LS Portable Computers User's Guide

IRQ6	Generated by the diskette drive controller to indicate that the diskette drive requires the attention of the
	microprocessor
IRQ7	Parallel port; available if parallel port is disabled
IRQ8	Reserved; generated by the real time clock
IRQ9	SCI in ACPI mode
IRQ10	PCI IRQA, B, C, D
IRQ11	Available
IRQ12	Reserved; generated by the keyboard controller to indicate that the output buffer of the touch pad or
	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 or DVD-ROM drive in the external media bay to indicate that the
	drive requires the attention of the microprocessor

Memory Allocations

Table 3 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.

NOTE: To view memory allocations in Windows 95 and 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.

Table 3. Conventional Memory Map
Address Range	Use
0000h-003FFh	Interrupt vector table
00400h-004FFh	BIOS data area
00500h-005FFh	MS-DOS® and BASIC work area
00600h-9FBFFh	User memory

Table 4 provides a map of the upper memory area. Some of these addresses are dedicated to various system devices, such as the system/video basic input/output system (BIOS). Others are available for use by expansion cards and/or an expanded memory manager (EMM).

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