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Interrupt Configuration
Reference – 38 EPM-4 Reference Manual
Interrupt Configuration
Default interrupt settings on the Lynx have been selected to maintain PC/AT compatibility. They
can be re-routed to satisfy customer constraints. Use the custom configuration screen in BIOS
setup to configure IRQ’s on the Lynx Not all devices can use all IRQ’s. Refer to Figure 8 for a
description of allowable IRQ assignm
ents for each device.
Figure 8. Interrupt Circuit Diagram
Components Group:
COM1, COM2, GP Timers, Watchdog,
PCI Interrupts.
COM3, COM4, LPT1
Available on PC/104 (ISA) bus Default IRQ assignments:
0 Timer 0
1 Keyboard
2 Slave PIC cascade
3 COM2
4 COM1
5 Unused
6 Floppy drive
7 Unused
8 Real-Time Clock
9 Unused
10 Unused
11 PCI Interrupt A,B,C,D
12 PS/2 Mouse
13 Math Co-processor
14 IDE controller
15 Unused