TS-8150-47XX Jumpers

From Technologic Systems Manuals

The TS-8150 includes a header with several jumpers and signals:

Jumper Description
SD Boot Used for bootstrapping macrocontroller to boot to SD
En Con Enables the Console by replacing XUART1 with the CPU console ttyS0
I2C (top) Connects I2C CLK to the #DIO Header
I2C (bottom) Connects I2C DAT to the #DIO Header
JP6 Connected to MFP_42

You can read JP6 with:

echo $(($(devmem 0xd4019004 32) >> 10 & 0x1))

This will return 0 when the jumper is on, and 1 when the jumper is off.