5

Programming Details

The assignments of the PCI and ISA interrupts supported by the PIB are as follows:

Table 5-3. PIB PCI/ISA Interrupt Assignments

PRI

ISA

PCI

Controller

Edge/

Polarity

Interrupt Source

Notes

 

 

 

IRQ

IRQ

 

Level

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

IRQ0

 

INT1

Edge

High

Timer 1 / Counter 0

1

 

 

 

 

 

 

 

 

2

IRQ1

 

 

N/A

N/A

Not used

 

 

 

 

 

 

 

 

 

3-10

IRQ2

 

 

Edge

High

Cascade Interrupt from INT2

 

 

 

 

 

 

 

 

 

3

IRQ8_

 

INT2

Edge

Low

ABORT Switch Interrupt

 

 

 

 

 

 

 

 

 

4

IRQ9

 

 

N/A

N/A

Not used

 

 

 

 

 

 

 

 

 

5

IRQ10

PIRQ0_

 

Level

Low

PCI-Ethernet Interrupt

2,3,4

 

 

 

 

 

 

 

 

6

IRQ11

PIRQ1_

 

Level

Low

Universe Interrupt (LINT0#)

2,3,4

 

 

 

 

 

 

 

 

7

IRQ12

 

 

N/A

N/A

Not used

 

 

 

 

 

 

 

 

 

8

IRQ13

 

 

N/A

N/A

Not used

 

 

 

 

 

 

 

 

 

9

IRQ14

PIRQ2_

 

N/A

N/A

Not used

 

 

 

 

 

 

 

 

 

10

IRQ15

PIRQ3_

 

Level

Low

PMC/PCIX Interrupt

2,3,4

 

 

 

 

 

 

 

 

11

IRQ3

 

INT1

N/A

N/A

Not used

 

 

 

 

 

 

 

 

 

12

IRQ4

 

 

Edge

High

COM1 (16550)

 

 

 

 

 

 

 

 

 

13

IRQ5

 

 

Level

High

LM/SIG Interrupt 0/1

4

 

 

 

 

 

 

 

 

14

IRQ6

 

 

N/A

N/A

Not used

 

 

 

 

 

 

 

 

 

15

IRQ7

 

 

N/A

N/A

Not used

 

 

 

 

 

 

 

 

 

5-6

Computer Group Literature Center Web Site

Page 250
Image 250
Motorola MVME2300 Series manual PIB PCI/ISA Interrupt Assignments, Edge