
Xtreme/104 Opto User’s Manual, Connect Tech Inc.
11 Revision 0.05
Mode 1 (one IRQ):
1. Ensure there are no jumpers across positions E and D on the JB3 jumper block.
2. All ports interrupt on one IRQ by setting jumpers on the A or C rows and the middle
rows of jumper blocks JB1 or JB2.
Mode 2 (two IRQs):
1. Jumper position D on the JB3 jumper block.
2. The odd ports (ports 1, 3) interrupt on one IRQ by setting jumpers on the B or D rows
and the middle rows of jumper blocks JB1 or JB2.
3. The even ports (ports 2, 4) interrupt on one IRQ by setting jumpers on the A or C rows
and the middle rows of jumper blocks JB1 or JB2.
Mode 3 (two IRQs – Xtreme/104 Opto, 4 port model only):
1. Jumper position E on the JB3 jumper block.
2. The first two ports (ports 1, 2) interrupt on one IRQ by setting jumpers on the A or C
rows and the middle rows of jumper blocks JB1 and JB2.
3. The last two ports (ports 3, 4) interrupt on one IRQ by setting jumpers on the B or D
rows and the middle rows of jumper blocks JB1 and JB2.
Mode 4 (four IRQs – Xtreme/104 Opto, 4 port model only):
1. Jumper positions D and E on the JB3 jumper block.
2. To set an IRQ for Port 1 install a jumper across a pair of pins on A row and the middle
row of IRQ block JB1.
3. To set an IRQ for Port 2 install a jumper across a pair of pins on B row and the middle
row of IRQ block JB1.
4. To set an IRQ for Port 3 install a jumper across a pair of pins on C row and the middle
row of IRQ block JB2.
5. To set an IRQ for Port 4 install a jumper across a pair of pins on D row and the middle
row of IRQ block JB2.
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