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Annex: Resources
II Annex: Resources
IO Range
The used resources depend on setup settings.
The given values are ranges, which are fixed by AT compatibility. Other IO ranges are used, which are
dynamically adjusted by Plug & Play BIOS while booting.
Address
0-FF
Reserved IO area of the board
170-17F
IDE2
1F0-1F7
IDE1
278-27F
LPT2
2E8-2EF
COM4
2F8-2FF
COM2
370-377
FDC2
378-37F
LPT1
3BC-3BF
LPT3
3E8-3EF
COM3
3F0-3F7
FDC1
3F8-3FF
COM1
Memory Range
The used resources depend on setup settings.
If the entire range is clogged through option ROMs, these functions do not work anymore.
Address
A0000-BFFFF
VGA RAM
C0000-CFFFF
VGA BIOS
D0000-DFFFF
AHCI BIOS / RAID / PXE (if available)
E0000-EFFFF
System BIOS while booting
F0000-FFFFF
System BIOS
Interrupt
The used resources depend on setup settings.
The listed interrupts and their use are given through AT compatibility.
If interrupts must exclusively be available on the ISA side, they have to be reserved through the BIOS setup.
The exclusivity is not given and not possible on the PCI side.
Address
IRQ0
Timer
IRQ1
PS/2 Keyboard
IRQ2 (9)
(COM3)
IRQ3
COM1
IRQ4
COM2
IRQ5
(COM4)
IRQ6
FDC
IRQ7
LPT1
IRQ8
RTC
IRQ9
IRQ10
IRQ11
IRQ12
PS/2 Mouse
page 72
Function
Function
Function
Beckhoff New Automation Technology CB2050
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