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Add note about firmware
===Analog Multiplexer===
U14 is an 8-channel mux/demux. Four of the channels (A0-A3) go to SP1. (A4-A7 appear to go to SENS2-4, need to be traced) Pin 3 is the common in/out, and goes to R13 (560k) and R15 (47k). R15 goes to U15 Pin 7 (555 Reset), and R13 goes to U15 Pin 8 (555 Control.) <br />
== Original Firmware ==
Original firmware is not locked and can be dumped with N0RC_PLZ_NAME_TOOL_USED.
Vector table is located at 0xFFE4
IDA Pro uses CPU type ST7->ST72324J6 during loading, and can load the Intel Hex file produced by the programmer directly for analysis.
==Modifications==
