Intel SBC-455 - Manual (Page 39)

Chapter 2 Installation 31
Reset switch (RESET SW)
You can connect an external switch to easily reset your computer.
This switch restarts your computer as if you had turned off the
power then turned it back on. The following table shows the pin
assignments for RESET SW.
Reset switch (RESET SW)
Pin Function
1 Ground
2 Reset
Turbo LED (TURBO LED)
You can connect a LED indicator across TURBO LED to indicate
when the CPU is in Turbo mode. Marks on the circuit board
indicate LED polarity (the pin on the left is positive).
Turbo LED (TURBO LED)
Pin Function
1 Turbo
2 Ground