90000h-9FBFFh User memory
NOTE: For the full name of an abbreviation or acronym used in this table, see the Glossary.
Table B-11 provides a map of the upper memory area. Some of these addresses are dedicated to various system devices, such as
the system BIOS. Others are available for use by expansion cards and/or an expanded memory manager (EMM). When the
processor or a program addresses a location within the upper memory area, it is physically addressing a location within one of
these devices.
Table B-11. Upper Memory Map
Address Range Use
0009FC00-0009FFFF PS/2-mouse data area
000A0000-000BFFFF Video RAM
000C0000-000C7FFF Video BIOS
000C8000-000EFFFF Available
000F0000-000FFFFF System BIOS
00100000-0010FFEF High memory area
0010FFF0-7FFFFFFF Extended memory
80000000-FFFBFFFF Reserved
FFFC0000-FFFFFFFF BIOS ROM
NOTE:
For the full name of an abbreviation or acronym used in this table, see the "Glossary".
