2 memory area, 3 i/o address map, Memory area – Kontron COMe-bHL6 User Manual
Page 62: I/o address map, Come-bhl6 / system resources
COMe-bHL6 / System Resources
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 information about HIMEM.SYS and EMM386.EXE. Other operating systems (Linux or Windows versions) allow
you to address the full memory area directly.
Upper Memory
Used for
Available
Comment
A0000h – BFFFFh
VGA Memory
No
Mainly used by graphic controller
C0000h – CFFFFh
VGA BIOS
No
Used by onboard VGA ROM
D0000h – DFFFFh
-
Yes
Free for shadow RAM in standard
configurations.
E0000h – FFFFFh
System BIOS
No
Fixed
20000000h-201FFFFFh
IGFX
No
Fixed
40000000h-401FFFFFh
IGFX
No
Fixed
E0000000h–FEAFFFFFh
PCIe Config Space
No
Fixed
FEC00000 - FECFFFFF
Local APIC/IOAPIC(s)
No
Fixed
FED00000h-FED003FFh
HPET
No
Fixed
FED10000h-FED17FFFh
MCH
No
Fixed
FED18000h-FED18FFFh
DMI
No
Fixed
FED19000h-FED19FFFh
EPBA
No
Fixed
FED1C000h-FED1FFFFh
RCBA
No
Fixed
FED20000h FED3FFFFh
TXT
No
Fixed
FED40000h FED44FFFh
TPM
No
Fixed
FED45000h FED8FFFFh
TPM
No
Fixed
FED90000h-FED93FFFh
VT-d
No
Fixed
FEE00000h-FEEFFFFFh
MSI area
No
Fixed
FF000000h-FFFFFFFFh
BIOS Flash
No
Fixed
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
Used for
Available
Comment
0000 - 001F
System Resources
No
Fixed
0020 - 003F
Interrupt Controller 1
No
Fixed
002E - 002F
Ext. SIO
No
Fixed
0040 - 005F
Timer, Counter
No
Fixed
004E - 004F
TPM
No
Fixed
0060 - 006F
Keyboard controller
No
Fixed
0070 - 007F
RTC and CMOS Registers
No
Fixed
0080
BIOS Postcode
No
Fixed
0081 - 009F
DMA Controller
No
Fixed
00A0 - 00BF
Interrupt Controller
No
Fixed
00C0 - 00DF
DMA Controller
No
Fixed
00F0 - 00FF
Math Coprocessor
No
Fixed
03B0 - 03DF
VGA
No
Fixed
0400 - 047F
Chipset
No
Fixed
04D0 - 04D1
Chipset
No
Fixed
0800 - 087F
Chipset
No
Fixed
0A00 - 0A0F
LPC
Yes
Routed to LPC
0A80 - 0A8F
CPLD
No
Fixed
0A90 - 0AFF
LPC
Yes
Routed to LPC
0CF8 - 0CFF
Chipset
No
Fixed
62