A logging device (PIC?). Parse serial data from flat-cable.

Hello! I need help building a device that register all signals from a electronic coin selector. Today the coin device is connected via flat cable (10 cables) that talks serial to a controller card that controls a vending machine. I need you to make a new special cable (Y-cable) or something that does not interuppt the default function of the box. And on that new cable should also be a PIC or something similar that is logging the signals that is comming in the flat-cable. The information is about what kind of coin is put into the machine. Maybe you can use some other output from the box? I guess the documentation will explain it. * I have full specifications in english for the coin selector that I attach to this project. * I have a box that I can send for development. Would be nice if you live inside EU for this sake, but not required. I want it to logg the data in a simple format. Can you get more data from the box then save that too. EXAMPLE: date;cointype;static_id\n date = 2008-08-10 18:23:44 cointype = What kind of coin signal. Make sure the box really accepted the coin first. static_id = a uniqe id for the box. I want to be able to change this in some settings file. It would be nice if the PIC (or whatever you build) could log this directly into a internal memory. Then when I want to get the data I just put a USB memory into it and it moves the logfile onto it. When I take the USB memory out it creates a new empty file and starts to log again. The file that is copied onto the USB must have unique names, so I can empty many boxes in a row and not worry about filenames. What I want: * A fully working device that can be plugged into a similar coin box without modifications. * Build it from cost effective hardware. I want a price estimation for the hardware before I accept. It must be easy to make more devices, and they must not be expensive to make. * I think about 2mb of internal memory will be enough for the logging device. * I want to be able to buy the hardware and make more devices efter instructions if possible. * You must be sure that you can make it. Becuse I don't wanna send the box unnecessarity.