It didn't start out this way. I have the Tiny85 breadboarded for programming and a new tube of 20 of the Tiny 85 chips. I have a new UNO R3 and am using arduino-1.0.2. I took the first three chips in the tube and ran the bootloader on each of them with no problems at all. Over a two day period, I loaded sketches on each of them and used them in breadboarded circuits and they all worked fine. With changes to the different sketches, each chip went through the use cycle maybe four times each. Everything was ready to make another set of chips.
I loaded Arduino ISP into the UNO and then the bootloader to an Tiny85 @8MHz chip and got
avrdude: Device signature = 0x000000 avrdude: Yikes! Invalid device signature
Everything I can think of checked okay and I tried and re-tried the chip but with the same results. I tried the next chip from the tube: same results. The next chip: same results. So with the next two chips...and with the last one in the tube. Not likely 8 dead chips!
I reset the UNO, reloaded the Arduino ISP, but with the same results. I put sketches on the UNO and they work fine. I made each of the UNO ports blink LEDs and the ports work. I get a heartbeat LED blinking on pin 9 on the breadboard when the Arduino ISP is running. I ran a backup copy of the arduino from another drive - same results. I even replaced the ATmega328P-PU. Everything seems okay, just won't take the bootloader.
The ISP reports it is programming an ATtiny85 The Arduino ISP is v 04m3 Avrdude is v5.11 compiled 9-2-2011 using programmer STK500 v1
I'm new at this, so any ideas would be most welcome.