Kontron COMe-cTH6 - Manual (Page 44)

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COMe-cTH6 User’s Guide
www.kontron.com
8 System Resources
8.1 Interrupt Request (IRQ) Lines
Tables showing IRQ number assignments will be supplied in a future version of this manual.
8.2 Memory Area
The first 640 KBytes of DRAM are used as main memory. With DOS, you can address 1 MByte of memory directly. The
memory area above 1 MByte (high memory, extended memory) is accessed under DOS with special drivers such as
HIMEM.SYS and EMM386.EXE, which are part of the operating system. See 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
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
8.3 I/O Address Map
The I/O-port addresses of the COMe-cTH6 COM are functionally identical to those of a standard PC/AT system. All
addresses not mentioned in the table below should be available. For compatibility reasons, we recommend that you
do not use I/O addresses below 0100h for additional hardware, even if they are available.
I/O Address Used for Available Comment
0000 - 001F System Resources No Fixed
0020 - 003F Interrupt Controller 1 No Fixed
002E - 002F Winbond driver No Fixed if W83627HG is in system
0040 - 005F Timer, Counter No Fixed
004E - 004F TPM No Fixed if TPM is in system
0060 - 006F Keyboard Controller No Fixed
0070 - 007F RTC and CMOS Registers No Fixed
0080 BIOS Postcode No Fixed
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