ok i thought so, but if i supply the chip with my onbord powersupply (7805) and dont connect the Vcc pin of JDM. I dont find the pic!
if i connect all over ICSP i can read, and of course find the chip in programms like winpic800, picpgm etc. if i now cut vcc from ICSP and power up my 7805 i dont detect the pic and read/write fail. I have no idea why??