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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

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 52 53

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Lynx EPM-4 Manual do Utilizador Página 46