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Notes:
1: Some vipers have a large pc104 interrupt load. Occurs with both Sep 14 (a1,a8) and the Oct 4 (a6) kernels.
2: Not completely sure why on m21 the IRQ3 load is less than the pc104 load. Perhaps that version of the pc104 irq routine must exit exits if no pending bits are 0.
3: High USB interrupts are seen on vipers with bluetooth radios interfaced via USB. Not on Titans. Assume it is due the different interfaces. On a1-19 Vipers, only bluetooth radios are on USB. On Titans a1-19, bluetooth and flash drive are on USB.
4: On c20,m21, m22, USB is used only for flash drives
The only titans with PC104 serial are a3 and m22. They're both OK.
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