Annex: Resources
Beckhoff New Automation Technology
CB1052
page 85
II Annex: Resources
A IO Range
The used resources depend on setup settings.
The given values are ranges, witch are fixed by AT compatibility. Other IO ranges are used, which are
dynamically adjusted by Plug & Play BIOS while booting.
Address
Function
0-FF
Reserved IO area of the board
170-17F
1F0-1F7
IDE1
278-27F
2E8-2EF
COM4
2F8-2FF
COM2
370-377
378-37F
LPT1
3BC-3BF
3E8-3EF
COM3
3F0-3F7
FDC1
3F8-3FF
COM1
B Memory Range
The used resources depend on setup settings.
If the USB boot function or legacy support is enabled, the BIOS uses 16KByte RAM in the range from
A0000-FFFFF. If the entire range is clogged through option ROMs, these functions do not work any more.
Address
Function
A0000-BFFFF
VGA-RAM
C0000-CFFFF
VGA-Bios
E0000-EFFFF
System-BIOS while booting
F0000-FFFFF
System-BIOS
C 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
Function
IRQ0
Timer
IRQ1
PS/2 Keyboard
IRQ2 (9)
COM3
IRQ3
COM1
IRQ4
COM2
IRQ5
COM4
IRQ6
FDC
IRQ7
LPT1
IRQ8
RTC
IRQ9
IRQ10
IRQ11
