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5 Technical Information
The PC's Memory Map
The PC's Memory Map
Memory Area
Memory Range
Extended Memory: 1 MB to 4 MB
Extended memory
1024 KB upward
Conventional Memory: 0 KB to 1024 KB (1 MB)
384 KB Reserved
960 KB to 1024 KB
Memory Area
896 KB to 960 KB
800 KB to 896 KB
768 KB to 800 KB
640 KB to 768 KB
640 KB Base
0 KB to 640 KB
Memory Area
88
English
Hexadecimal
Used By
Address Range
01000 to 0F0000
Windows Applications
0F0000 to 010000
64 KB BIOS area
0E0000 to 0F0000
64 KB (available)
0C8000 to 0E0000
96 KB available for
accessory boards
0C0000 to 0C8000
32 KB Video BIOS Area
0A0000 to 0C0000
128 KB Video Memory Area
09F000 to 0A0000
Extended BIOS Data Area
—
User Application Program
Area
—
MS-DOS Operating System
0500 to 0700
MS-DOS Temp Buffer
0400 to 04FF
BIOS Data Area
0000 to 03FF
Interrupt Vector Table
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