Fix for FC0012

Hi, I think my messages are getting filtered, but on the chance that someone is reading these as unmoderated, the fix for the FC0012 is to set GPIO 4 to 0. It could be that GPIO4 is the RST, or that it is something else entirely. Looking through the code, and the state of the registers on startup, one of the surprisingly few side effects of writing GPD to GPO would be to set GPIO4 to 0. Multiple bugs working together made the whole thing work. David