ISC PCI6000, User Manual

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PCI6000 User’s Manual Chapter 23 Interrupt, Memory and I/O Map 115
23.1 PCI6000 Interrupt Map
*) As USB and ethernetcontroller are assigned the Plug and Play (PnP) way by the BIOS,
always check the assignment listed by the BIOS in the bootsequence to ensure that those
IRQ do not conflict with the add-on card. To avoid the PnP system to make use of the IRQ
the PCI/PnP configuration may be set to “Legacy ISA”.
IRQ9 is unassigned and may be used for external add-on cards. If more interrupts are need-
ed it may be necessary to enter the BIOS setting to disable embedded devices IRQ which
are not used in the system to free the number of IRQ required. If the PCI6000 is without
touch screen interrupt 10 may be used additionally.
Chapter 23 Interrupt, Memory and I/O Map
Interrupt Function PnP/PCI default Remark
Configuration
IRQ0 Internally Timer 0 output
IRQ1 Keyboard
IRQ2 Internally cascade for IRQ8 - IRQ15
IRQ3 COM2 (shared with COM4) PCI/ISA PnP Free if COM2 not present
IRQ4 COM1 PCI/ISA PnP Free if COM1 not present
IRQ5* Standard assigned to USB controller by BIOS PCI/ISA PnP Free if not assigned to USB
IRQ6 Floppy disk
IRQ7 Parallel port (may be moved to IRQ5 in BIOS) PCI/ISA PnP Free if LPT1 not present
IRQ8 Real-time clock
IRQ9 - PCI/ISA PnP Free
IRQ10 COM3 - used if Touch Screen installed Legacy ISA Free if Touch not present
IRQ11* Standard assigned to Ethernetcontroller by BIOS PCI/ISA PnP Free if not assigned to NET
IRQ12 PS/2 Mouse PCI/ISA PnP
IRQ13 Internally Co-processor support
IRQ14 IDE port 1 - internal Harddisk drive PCI/ISA PnP
IRQ15 IDE port 2 - external CD ROM PCI/ISA PnP Free if not assigned to CD ROM
Released