I just installed IDE 1.0.5 on my Dell Latitude E6400 because the ATtiny85 8 Mhz board file configuration was not working with IDE V 1.5.8. The 1 Mhz configuration compiled ok and worked but I could not use the 8 and 16 Mhz boards.txt configurations because it would not compile. I remembered that it had worked in the past because I programmed an ATtiny85 to output a clock frequency of 153 khz for my Nerdkits EL Backlight 300V switching supply that uses two ATtiny85s , one with a mosfet drive frequency of 153 hz and the other with 153 khz. That backlight supply is still working so I know it worked in the past because I could not get the higher frequency with the 1 Mhz configuration so I had to use the 16 mhz configuration. When the 8 Mhz ATtiny85 Boards file config didn't work with IDE v 1.5.8 I uninstalled it and installed v 1.0.5 and that fixed the problem for both 8 Mhz and 16 Mhz. In researching this issue , I ran across this article which supposedly explains how to "migrate" (whatever that means) to 1.6.x from v 1.0.5. Unfortunately I could not follow the instructions. (I would follow them if I could understand them). My area of expertise is hardware and I try to get by with the software any way I can. Is there any other way to explain what I need to do to "upgrade" from v 1.0.5 to 1.6.x and still have my ATtiny85 * Mhz and 16 Mhz boards.txt file configurations work ?
I think that most active on attiny core maintance is :
SpenceKonde_ATTinyCore
And it is freq. update when new IDE release, with good install explanation.
Thanks ! (karma added)
I followed the instructions to :
1-install the ATtiny cores
2-enter the URL given for the Boards Manager. (I tried copy & paste but "paste" doesn't work in the Boards Manager URL window so I pasted it into Notepad and read it from there as I typed it in.
I loaded a Blink sketch, and ran it at 1 Mhz
Then I changed the clock to 8 Mhz and ran the Blink sketch again.
It blinked for 8 seconds , confirming that the boards clock configuration worked (otherwise it would still be 1 second).
Then I did "Burn Bootloader" to set the fuses.
Then I ran the sketch again to verify the blink duration was 1 second, (which it was) confirming that the whole process worked. I am sure it works for the other frequencies but I'll test 16 Mhz tomorrow.
Thanks for your help.
Nice - do let me know if anything doesn't work right 
common_ground:
I think that most active on attiny core maintance is :
SpenceKonde_ATTinyCore
And it is freq. update when new IDE release, with good install explanation.
Thanks for the vote of confidence
Trust me. If I can understand the instructions , they are better than good ! (karma added)
DrAzzy,
I also came across the inability to paste into the URL window with the mouse. I did find that Ctrl-V pasted the URL just fine. You may want to add that hint into the README, it will save people the frustration of the notepad-typing method.
Less Than Three Kittens,
Don B-W
DBW1341:
DrAzzy,I also came across the inability to paste into the URL window with the mouse. I did find that Ctrl-V pasted the URL just fine. You may want to add that hint into the README, it will save people the frustration of the notepad-typing method.
Less Than Three Kittens,
Don B-W
I'm confused by what you mean? How else could one paste the URL other than ctrl+v?