BECKHOFF CB2051 - Manual (Page 76)

Annex: Resources
page 76 Beckhoff New Automation Technology CB2051
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 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
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