Figure 10. Detailed System Memory Address Map - Intel SE7221BA1 Technical Manual

Maps and Interrupts
PCI Memory Range -
contains PCI, chipsets,
Direct Media Interface
(DMI), and ICH ranges
(approximately 750 MB)
DRAM
Range
Compatibility
Memory
22
4 GB
Top of System Address Space
FLASH
APIC
Reserved
DOS

Figure 10. Detailed System Memory Address Map

Intel® Entry Server Board SE7221BA1-E TPS
~20 MB
0FFFFFH
0F0000H
0EFFFFH
Top of usable
DRAM (memory
visible to the
0E0000H
operating
0DFFFFH
system)
0C0000H
0BFFFFH
1 MB
640 KB
0A0000H
09FFFFH
00000H
0 MB
1 MB
Upper BIOS
area (64 KB)
960 KB
Lower BIOS
area
(64 KB;
16 KB x 4)
896 KB
Add-in Card
BIOS and
Buffer area
(128 KB;
16 KB x 8)
768 KB
Standard PCI/
ISA Video
Memory (SMM
Memory)
128 KB
640 KB
DOS area
(640 KB)
0 KB
OM17140
Revision 1.5