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10/
System Resources
The system resource information is currently in work and not available in this revision of the user guide.
10.1. Legacy Interrupt Request (IRQ) Lines
The following table specifies the device connected to each Interrupt line or if the line is available for new devices.
Table 20: Legacy IRQ Lines
IRQ
General Usage
1
Timer
2
Keyboard
3
Redirected secondary PIC
4
PCI devices
5
PCI devices
6
LPT2/PCI devices
7
FDD
8
LPT1
9
RTC
10
SCI / PCI devices
11
COM2
12
COM1
13
PS/2 mouse
14
FPU
15
IDE0
[1]
COM1 and COM2 IRQ are valid only for Windows OS. For Linux non-legacy IRQs are used, IRQ16(COM1) and IRQ17(COM2).
Configuration is done via „Advanced -> OS Selection" BIOS option
10.2. Memory Area
The first 640 kB of DRAM are used as main memory (0000-0000 0009-FFFF). Using DOS, you can address the 1 MB of
memory directly using special drivers such as HIMEM.SYS and EMM386.EXE, which are part of the operating system.
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
The following table specifies the usage of the address ranges within the memory area.
Table 21: Designated Memory Locations
Address Range (hex)
DOS DRAM 0 to 1 MB
0000-0000
0009-FFFF
000A-0000
000B-FFFF
000C-0000
000D-FFFF
000E-0000
000E-FFFF
000F-0000
000F-FFFF
Lower Dram - 1MB to TOLUD (Top of Lower Usage DRAM)
00F0_0000
0100-0000
www.kontron.com
[1]
[1]
Size
Project Usage
640 KB
DOS (memory)
128 KB
VGA (A Segment and B Segment
128 KB
DRAM (C Segment and D Segment)
64KB
Extended System BIOS
64 KB
System BIOS upper F segment
1MB
System memory (Low DRAM). This range is always mapped the DRAM .
COMe-bDV7 - User Guide, Rev 1.0
Project Usage
Timer
Keyboard (SuperIO)
Redirected secondary PIC
Free for PCI devices
Free for PCI devices
One of COM3+4
One of COM3+4 or not used
LPT1 or one of COM3+4
RTC
Free for PCI devices
COM2
[1]
COM1
[1]
PS/2 mouse (or free for PCI devices)
FPU
Not used
[1]
[1]
// 47
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