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COMe-cBT6 / User Guide
5.
System Resources
5.1. Interrupt Request (IRQ) Lines
IRQ #
Used For
0
Timer0
1
Keyboard
2
Redirected secondary PIC
3
Onboard - COM2
4
Onboard - COM1
5
SIO COM3 or 4
6
SIO COM3 or 4
7
SIO LPT or COM3/4
8
RTC
9
Free for PCI devices
10
Free for PCI devices
11
Free for PCI devices
12
PS/2 mouse or free for PCI devices
13
FPU
14
not used
15
not used
5.2. Memory Area
Address range (hex)
Size
Usage
00000000-0009FFFF
640 KB
DOS- (Real mode-) memory
000A0000-000BFFFF
128 KB
Display memory
000C0000-000CBFFF
48 KB
VGA BIOS
000CC000-000DFFFF
80 KB
Option ROM or XMS
000E0000-000EFFFF
64 KB
System BIOS extended space
000F0000-000FFFFF
64 KB
System BIOS base segment
0x20000000 00100000-7FFFFFFF
2 GB – 1 MB
System memory (Low DRAM)
0x20000000-0x20001000
4KB
Minimum mapping for chipset LPE device
80000000-FFF00000
2 GB – 1 MB
PCI memory, other extensions (Low MMIO)
FEC00000-FEC00040
64 Bytes
IOxAPIC
FED00000-FED003FF
1 KB
HPET (Timer)
FED1C000-FED1CFFF
4KB
Chipset internal register space
FED40000-FED4B000
44 KB
TPM hard coded memory
FFFF0000-FFFFFFFF
64 KB
Mapping space for BIOS ROM/Boot vector
100000000-17FFFFFFF
2 GB
System memory (High DRAM)
180000000-F00000000
58 GB
High MMIO
Содержание COMe-cBT6
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