Silicon Graphics Origin200, Owner'S Manual

Page: 259 / 288

External Interrupt Ports
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External Interrupt Ports
The external interrupt interface uses two 1/8” (3.5 mm) stereo jacks: one to generate
interrupts and one to receive interrupts. The jacks are located on the back of the
Origin200 server and are wired as indicated in Table A-6:
When constructing interrupt cables, use two-conductor, shielded cable, wired straight
through (tip-to-tip, ring-to-ring, sleeve-to-sleeve using the shield). For more information
on the external interrupt interface, see the ei(7) man page.
Table A-6 External Interrupt Port Conductors
Conductor Function
Tip Interrupt (active low)
Ring +5 V
Sleeve Chassis ground and cable shield