Service manual

Troubleshooting Your Computer: Dell Latitude CP
FF200000-FF2FFFFF Video RAM
FFFE0000-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.
I/O Memory 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 determine its memory address. If there
is a conflict with a memory address reserved by the system, change the address of the device.
NOTE: To view I/O addresses in Windows 95, select the Start button, and point to Settings
and then to Control Panel. Double-click the System icon. Select the Device Manager tab, and
then double-click Computer.
Table 3-7. I/O Memory Map
Address Device
0000-001F DMA controller #1
0020-003F Interrupt controller #1
0040-005F System timers
0060-006F Keyboard controller
0070-007F RTC and NMI enable
0080-009F DMA page registers
00A0-00BF Interrupt controller #2
00C0-00DF DMA controller #2
00F0-00FF Math coprocessor
0170-0177 CD-ROM controller
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