Dell Latitude L400 User Manual page 36

NOTE: 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.
Windows 2000 handles memory allocations automatically. Refer to your Windows 2000 documentation for more information.
Table 3. Conventional Memory Map
Address Range
0000h-003FFh
00400h-004FFh
00500h-005FFh
00600h-9FBFFh
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).
When the microprocessor or a program addresses a location within the upper memory area, it is physically addressing a location within one of
these devices.
Table 4. Upper Memory Map
Address Range
0009FC00-0009FFFF
000A0000-000BFFFF
000C0000-000CFFFF
000D0000-000D07FF
000D0800-000D3FFF
000DC000-000DFFFF
000E8000-000FFFFF
00100000-03FFFFFF
FD000000-FDFFFFFF (approximate; not a fixed location)
FE000000-FE01FFFF (approximate; not a fixed location)
FECFE000-FECFEFFF (approximate; not a fixed location)
FFF80000-FFFFFFFF
I/O Memory Map
Table 5 provides a map of memory addresses reserved by the computer for peripheral input/output (I/O) devices. Use the information in Table 5 to
determine if the memory address of an external device (such as a PC Card) conflicts with a memory address reserved by the computer.
Check the documentation of the external I/O device to determine its memory address. If a device's memory address conflicts with a memory
address reserved by the computer, change the address of the device.
NOTE: To view I/O addresses 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.
Windows 2000 handles memory allocations automatically. Refer to your Windows 2000 documentation for more
information.
Table 5. I/O Memory Map
Address
0000-001F
0020-003F
0040-005F
0060-0060
0061-0061
Use
Interrupt vector table
BIOS data area
MS-DOS® and BASIC work area
User memory
Use
PS/2-mouse data area
Video RAM
Video BIOS
3Com boot ROM
Unavailable
SMBIOS data area
System BIOS
High memory area
Video RAM
Video RAM
Video RAM
BIOS ROM
Device
DMA controller #1
Interrupt controller #1
System timers
Keyboard controller
System speaker