Appendix
B. Interrupt Request Lines (IRQ)
There are a total of 15 IRQ lines available on the Industrial CPU Card. Peripheral devices use interrupt request lines to notify CPU for the service required. The following table shows the IRQ used by the devices on the Industrial CPU Card.
| Level |
|
| Function |
|
| IRQ0 |
| System Timer Output |
| |
| IRQ1 |
|
| Keyboard |
|
| IRQ2 |
| Interrupt Cascade |
| |
| IRQ3 |
| Serial Port #2 |
| |
| IRQ4 |
| Serial Port #1 |
| |
| IRQ5 |
| Parallel Port #2 |
| |
| IRQ6 |
|
| Floppy Disk Controller |
|
| IRQ7 |
| Parallel Port #1 |
| |
| IRQ8 |
| Real Time Clock |
| |
| IRQ9 |
| Software Redirected to Int 0Ah |
| |
| IRQ10 |
|
| Reserved |
|
| IRQ11 |
|
| Reserved |
|
| IRQ12 |
|
| Reserved |
|
| IRQ13 |
| 80287 |
| |
| IRQ14 |
| Primary IDE |
| |
| IRQ15 |
| Secondary IDE |
| |
130 | CI5VGM User’s Manual |
