Peter van Hoof writes: > I am quickly running out of ideas here > There are three more things worth mentioning > > 1 try to program when you have checked the checkbox > "slow mode (to check for timing problems)" on the "interface" tab > > 2 the wires between pic programmer hardware and pic > should be short (less than 10 cm is ideal) It's shorter than 10 cm. > 3 there is a reference in the help file about PGC and PGD filtering > suggested by Olin Lathrop > file:///C:/Program%20Files/WinPic/html/index.htm#pgd_pgc_filtering > that suggests putting two capacitors between 22 and 47 pf near > the chip to be programmed and a resistor of 100 ohm between > the target pic and the cap. >> > Peter van Hoof I modified the simple LPT Programmer as Olin advices. Now, when I program the PIC18F2550 with Pikdev on Debian GNU/Linux Lenny system, the PIC was recognised, and when the PIC are Verified, only the following ERROR occure: Warning: [EEPROM] (addr = 0xf00056, device = 0xff00, buffer = 0xffffff00) Is this error serious, or can I ignore them? Any advices will be appreciated! -- Regards, Paul Chany http://csanyi-pal.info -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist