Kontron COMe-cPV2(v1.4) - Manual (Page 62)

Kontron microETXexpress-PV User’s Guide
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7.2 Memory Area
The first 640 KBytes of DRAM are used as main memory. With DOS, you can
address 1 MByte of memory directly. Memory area above 1 MByte (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. 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 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
7.3 I/O Address Map
The I/O-port addresses of the microETXexpress®-PV COM are functionally
identical to those of a standard PC/AT system. All addresses not mentioned in
Table 1 should be available. We recommend that you do not use I/O addresses
below 0100h for additional hardware for compatibility reasons, even if
available.
Table 23: I/O Address Assignments
I/O Address Used for Availa
ble
Comment
0000 – 000F Direct memory access
controller No Fixed
0010 – 001F System Resources No Fixed
0020 - 0021 Interrupt Controller 1 No Fixed
0022 – 003F System Resources No Fixed
002E - 002F WB83627 No Fixed if WB83627HG
is in system
0040 - 0043 Timer, Counter No Fixed
0044-005F System Resources No Fixed
0060-0060 System Resources No Fixed
0061 - 0061 System Speaker No Fixed
0062 – 006F System Resources No Fixed
0070 - 007F RTC and CMOS Registers No Fixed
0080 BIOS Postcode No Fixed
0081 - 008F DMA Page Register No Fixed