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5.2
Memory Area
The first 640 kB of DRAM are used as main memory. Using DOS, you can address 1 MB of memory directly. Memory area
above 1 MB (high memory, extended memory) is accessed under DOS via special drivers such as HIMEM.SYS and
EMM386.EXE, which are part of the operating system. Please refer to the operating system documentation or special
textbooks for infor- mation about HIMEM.SYS and EMM386.EXE. Other operating systems (Linux or Windows versions)
allow you to address the full memory area directly.
Upper Memory
A0000h – BFFFFh
D0000h – DFFFFh
E0000h – FFFFFh
E0000000h–FEAFFFFFh
FEC00000 - FECFFFFF
FED00000h-FED003FFh
FED10000h-FED17FFFh
FED18000h-FED18FFFh
FED19000h-FED19FFFh
FED1C000h-FED1FFFFh
FED20000h FED3FFFFh
FED40000h FED44FFFh
FED45000h FED8FFFFh
FED90000h-FED93FFFh
FEE00000h-FEEFFFFFh
FF000000h-FFFFFFFFh
5.3
I/O Address Map
The I/O-port addresses of the are functionally identical to a standard PC/AT. All addresses not mentioned in this table
should be available. We recommend that you do not use I/O addresses below 0100h with additional hardware for
compatibility reasons, even if available.
I/O Address
0000 - 001F
0020 - 002D
002E - 002F
0030 - 003D
0040 - 0042
0043
004E - 004F
0050 - 0052
0053
0060 - 006F
0070
0071 - 0077
0080
0081 - 009F
00A0 - 00BD
00C0 - 00DF
00F0
0170 - 01F7
0200 - 020F
0376
03F6
04D0 - 04D1
0CF9
0A00 - 0A0F
0A80 - 0A8F
0A90 - 0AFF
0CF8 - 0CFF
1000 - 13FF
51
Used for
VGA Memory
-
System BIOS
PCIe/IGFX
IOAPIC/PCIe
HPET
MCH
DMI
EPBA
RCBA
TXT
TPM
TPM
VT-d
MSI area
BIOS Flash
Used for
System Ressources
Interrupt Controller
LPC SIO
Interrupt Controller
Timer, Counter
Reserved
LPC SIO
Timer, Counter
Reserved
Micro-, NMI controller
Reserved
RTC Controller
BIOS Postcode
Reserved
Interrupt Controller
Reserved
Interrupt Controller
Sata Controller
Game Port (LPC)
Sata Controller
Sata Controller
Interrupt Controller
Reset Generator
LPC
CPLD
LPC
Chipset
Chipset, GPIO
Available
No
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Available
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
No
Yes
No
No
COMe-cHL6 / System Resources
Comment
Mainly used by graphic controller
Free for shadow RAM in standard
configurations.
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Comment
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Routed to LPC
Fixed
Routed to LPC
Fixed
Fixed
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