Installing PC/Xi Boards
15
Interrupt Request (IRQ) Line—DS2
DS2 is used to specify which IRQ line will be used by the board to interrupt the
host. Each board must have its own unique IRQ selection, and that IRQ line
must not be used by any other device in the system. Select the IRQ by setting
the appropriate switch in DS2 as shown below.
Most DigiBoard device drivers do not use interrupts, so the normal setting for
DS2 is “Disabled” (all switches turned OFF).
Figure 6
DS2—PC/Xi IRQ Selection
1
2
3
4
5
6
7
8
Disabled
1
2
3
4
5
6
7
8
IRQ3
1
2
3
4
5
6
7
8
IRQ4
1
2
3
4
5
6
7
8
IRQ5
1
2
3
4
5
6
7
8
IRQ7
1
2
3
4
5
6
7
8
IRQ10
1
2
3
4
5
6
7
8
IRQ11
1
2
3
4
5
6
7
8
IRQ12
1
2
3
4
5
6
7
8
IRQ15
