I had been meaning to try and dump the ROM image of the main cpu of my central heating, but wanted to wait doing that until the weather was a bit better, afterall I didn't want to blow up the chip in the middle of winter.
I actually didn't expect it was going to be possible to dump it, since most devices have a fuse which you can blow to prevent reading out the image, but it was worth the shot.
So took the CPU to work today, since I have access to a universal chip flasher here. To my surprise, the thing read out the chip without problems! So I now have a dump which I can start to reverse. The processor is an ST62T25, unfortunately I don't have a disassembler for that chip, so that will be the next step, writing one.
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