Dell Latitude Xpi CD - Manual (Page 57)

Troubleshooting Your Computer 3-17
I/O Map
Table 3-7 provides a map of memory addresses reserved by
the system for peripheral I/O devices. Use the information in
Table 3-7 to determine if the memory address of an external
peripheral (such as a PC Card) conflicts with a memory
address reserved by the system.
Check the documentation of the external I/O device to deter-
mine its memory address. If there is a conflict with a memory
address reserved by the system, change the address of the
device.
Table 3-6. Upper Memory Map
Address Range Use
0009FC00–0009FFFF PS/2-mouse data area
000A0000–000BFFFF Video RAM
000C0000–000C7FFF Video BIOS
000C8000–000CFFFF Available
000D0000–000DBFFF Reserved for PC Card
000F0000–000FFFFF System BIOS
00100000–0010FFEF High memory area
0010FFF0–1FFFFFFF Extended memory
20000000–FFFBFFFF Reserved
FFFC0000–FFFFFFFF BIOS ROM
NOTE: For the full name of an abbreviation or acronym
used in this table, see the Glossary in the online System
User’s Guide.
Table 3-7. I/O Map
Address Device
0020-003F Interrupt controller #1
0040-005F System timers
0060-006F Keyboard controller
0070-0071 RTC and NMI enable
0080-009F DMA page registers
00A0-00BF Interrupt controller #2
00C0-00DF DMA controller #2
00F0 Coprocessor busy clear
00F1 Coprocessor busy reset
00F8-00FF Coprocessor
01F0-01F8 Hard-disk drive controller
0170–0178 CD-ROM controller
0200-0207 Joystick controller
0220-022F Audio controller
0278-027F LPT2
02F8-02FF COM2
0378-037F LPT1
03C0-03DF VGA
03E0–03E1 PC Card controller
03F0-03F7 Diskette controller
03F8-03FF COM1
NOTE: For the full name of an abbreviation or
acronym used in this table, see the Glossary in the
online System User’s Guide.