casio watch keyboard

5.preparation - means recomposition (reinvention) of instrument most interesting things happened here - on connection cpu with memory i'm going to disturb or modify this communication i'll brake connection between cpu and memory and lead it out to breadboard even lenght of these additional cables can disturb data flow let's see if we success with it - first we have to remove soldermask we'll do it mechaniaclly

breaking paths soldering ribbon cable soldering ribbon cable - even to cpu and odd to memory and so on and on from time to time i'm checking connections many hours later and done communication lines between cpu and memory broken adressing lines here data lines here

here cpu requests information and here cpu gets data we broke paths for those signals and now we can disconnect and repatch signals for e.g. turn off a few bits lets try piano and now turn off a few adressing bits and now we getting something different

reset, and disconnect something different turn two bits off in data line and two bits in adress part and now swap them datasignal should target here but we'll connect two adress bits here i must say that breaking and reconnecting data lines gives deeper changes than just shortening random points and now breadboard above this is kind of experimental farm, powered with 5v

let's check power rails this is minus (0) rail -------------------------------------------------------- and plus 5v here+++++++++++++++++++++++++++++ let's connect led first 220ohm resistor and now led choose one with straight leads here we go - botom is minus and upper is plus long lead up, short lead down

and of course it is not working :) aha! i have to connect it to plus also