Interfaces and Connectors
EPM-32 Reference Manual
46
Interrupt Configuration
The EPM-32 has the standard complement of PC type interrupts. Ten non-shared interrupts are
routed to the PC/104 bus, and up to four IRQ lines can be allocated to PCI devices. There are no
interrupt configuration jumpers. All configurations are handled through the CMOS setup. If you
need to use interrupt lines on the PC/104 bus, IRQ5, 9 or 10 are recommended.
Table 18: EPM-32 IRQ Settings.
= default setting
= allowed setting
Source
IRQ
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Timer 0
Keyboard
Slave PIC
COM1
COM2
Floppy
LPT1*
RTC
Mouse
Math Chip
Pri. IDE
Sec. IDE
ISA IRQ3
ISA IRQ4
ISA IRQ5
ISA IRQ6
ISA IRQ7
ISA IRQ9
ISA IRQ10
ISA IRQ11
ISA IRQ12
ISA IRQ14
ISA IRQ15
PCI INTA#
PCI INTB#
PCI INTC#
PCI INTD#
*
When LPT1 is in floppy disk mode, the pins change function, the LPT device is no longer available, and the
floppy disk controller uses IRQ 6.
Table 19: PCI Interrupt Settings
= default setting
= allowed setting
Source
PCI Interrupt
INTA#
INTB#
INTC#
INTD#
Video
Audio
USB
SMBus
IDE
USB
Ethernet