Homebrew PCBs

Stefan, 
If it is possible send me your inkjet cartridge data. I can help you if you wish to do your SW. I didn't finalize my circuit it is still using RAM instead of E2.  I have just received E2 chips from Digikey most probably end of next week I could be able to add E2 interface.
  
Volkan 
.... making a chip replacement with a  microcontroller?