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".