Specifications

Page 1

IRQ Map

This appendix defines interrupt requests which the EPC-30 decodes. All IRQs are set

by resistors and can only be modified by removing or installing resistors.

System IRQ Map

PC INT# IRQx Vector

(Hex)

EPC-30 Usage Standard PC

Usage

2 NM1 8 Shutdown Parity Error-

I/OCHK

8 IRQ0 20 Interval Timer 0 same

9 IRQ1 24 Keyboard Controller same

A IRQ2 28 Cascade Interrupt Input same

B IRQ3 2C COMB/COMC or PCMCIA same

C IRQ4 30 COMA/COMB/COMC or

PCMCIA

same

D IRQ5 34 COMB/COMC or PCMCIA LPT2

E IRQ6 38 Floppy Drive same

FIRQ73C LPT1 same

70 IRQ8 1C0 Real Time Clock same

71 IRQ9 1C4 COMB/COMC or PCMCIA VGA

72 IRQ10 1C8 Not supported on Intel386 EX ISA

73 IRQ11 1CC Not supported on Intel386 EX ISA

74 IRQ12 1D0 PS/2 Mouse or ISA Mouse (PS/2)

75 IRQ13 1D4 Not supported on Intel386 EX Co-processor

76 IRQ14 1D8 IDE / PCMCIA HDC

77 IRQ15 1DC Internal 386 EX use ISA

Table B-1. EPC-30 System IRQ Map.

Make sure that the BIOS Setup screen where you select serial port settings

matches the actual connection as shown in Figure 2-2:

Figure 2-2 Listing: Recognized by DOS as: BIOS Setup should be:

COMA COM1 COMA

COMB COM1/COM2/COM3 COMB