Interrupt Configuration - VersaLogic Python EBX-11 Reference Manual

Interrupt Configuration

The EBX-11 has the standard complement of PC type interrupts. Four non-shared interrupts are
routed to the PC/104 bus, and up to four IRQ lines can be allocated as needed to PCI devices.
There are no interrupt configuration jumpers. All configuration is handled through CMOS Setup.
The switches in Figure 11 indicate the various CMOS Setup options. Closed switches show
factory default settings.
If your design needs to use interrupt lines on the PC/104 bus, IRQ10 is recommended. (IRQ3 and
IRQ4 are normally used by COM ports on the main board.)
Real Time Clock
COM1
COM2
COM3
COM4
LPT1
CPU Temp
PC/104 IRQ10 (D3)
COM1
COM2
COM3
COM4
LPT1
CPU Temp
Mouse
Math Coprocessor
Primary IDE
EBX-11 Reference manual
CMOS Setup
PCI INTA#(B29)
Ethernet 0
PCI INTB#(C29)
Ethernet 1
PCI INTC#(D29)
PCI INTD#(B28)
USB
IRQ8
IRQ9
Keyboard
IRQ10
Slave
IRQ11
PIC
IRQ12
IRQ13
IRQ14
IRQ15
PC/104 IRQ3 (B25)
COM1
COM2
COM3
COM4
LPT1
CPU Temp
PC/104 IRQ4 (B24)
COM1
COM2
COM3
COM4
LPT1
CPU Temp
Figure 13. Interrupt Circuit Diagram
System Resources and Maps
Interrupt
Routing
Watchdog
Memory Error
IRQ0
Timer 0
IRQ1
NMI
IRQ2
Master
IRQ3
PIC
INT
IRQ4
IRQ5
IRQ6
IRQ7
COM1
COM2
COM3
COM4
LPT1
CPU Temp
Floppy Disk
PC/104 IRQ5 (B23)
COM1
COM2
COM3
COM4
LPT1
CPU Temp
IRQ5
IRQ9
IRQ10
IRQ11
IRQ15
CPU
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