There are tools for reading/writung the EEPROM memory (http://ipt.nm.ru/iPTool.rar or http://www.resetters.com/download/RestoreEEPROM.zip). Any non-volatile settings and therefore also the flag for using 3rd party ink should be stored there.
I was looking for firmware updates of any Canon...
Hi Tin Ho,
I would be very interested in a Firmware dump. A high resolution picture of the main board would be also very nice to figure out the used CPU type and other chips. Most probably highly integrated ICs are used. I haven't found any internals about the pixma hardware or firmware on the...