Bootloader Problem

I'm stuck and could really use some help.

I know this is a topic well covered elsewhere -- but I can't solve this one.

Have many Atmega8 chips bootloaded as Arduinos. Went to bootload some new chips (from same batch) on a PC with a parallel programmer (http://www.arduino.cc/en/Hacking/ParallelProgrammer) and get flash errors @ and a slew of locations and bootload fails. This is new, I have used this machine, board and cable for this purpose before -- successfully. Now -- can't make it work. Tried a different PC -- same problem. Did all the trouble shooting -- giveio, tried the registry patch (http://www.arduino.cc/en/Hacking/Bootloader?from=Main.Bootloader). No luck.

Got out an AVRISP mkII. Decided to try bootloading on my mac (usually work on a mac but use PC for bootload).

Followed all instructions at (Arduino Playground - HomePage). Running on a PPC PowerBookG4. OSX 10.4.8.

These are set up on a breadboard -- following instructions -- here (http://www.arduino.cc/en/Main/StandaloneAssembly).

Get the following error --

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.11s

avrdude: Device signature = 0xffffff
avrdude: Yikes! Invalid device signature.
Double check connections and try again, or use -F to override
this check.

avrdude done. Thank you.


How do i fix this?

I could really use some help -- any suggestions ?? I am not a strong command line person -- but am confident on the physical sides of this setup --- have found some other info for the 168 (http://wolfpaulus.com/journal/embedded/arduino2.html) -- but am not sure the difference in the code --

have seen the solution for avrdude with a parallel connection -- but don't have any machine so configured.

Need a solution -- any help gratefully accepted!

steve

When you attempt to bootload with the parallel programmer, does every location fail or only some? What circuit did you use when trying to burn the ATmega8's with the parallel programmer? Can you take a picture of it (and the circuit you used with the AVRISP mkII)?

Hi,

thanks for the reply --

have posted the consold from the parallel bootload attmpt and 3 bad photos to --

http://imagearts.ryerson.ca/sdaniels/physcomp/ardbootld.html

I will replace the photos asap -- thanks for advice.

please let me know if you need anything else.

s

It looks like every byte is failing, which makes me suspect bad wiring, or a locked chip (which you'd probably only have if the chip came with some other firmware on it for some specific function). When you get some better pictures up, I'll take a look.

ok -- i will recheck wiring after some sleep and post better pics asap -- thanks

the chips were raw from digikey -- should not have been locked --

Could a mistake in wiring lock the chip with the bootloader code / circuits?
that is, could i be permanently locking the chips with the error? -- is there any way for you to tell?

thanks again

steve