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Ghetto programmer and 16Mhz Answered

First off, Hello everyone. I built the ghetto parallel port programmer, adjusting the pinouts to work with a attiny26 and it works flawlessly.Kudos to the author.My problem is that when I drop in an external crystal rated at 16Mhz I avrdude quits because of a faulty signature; I assume this means the timings are off.At firs I thought I had misconfigured the fuses, but ,thankfully, when I dropped an 8Mhz crystal in it worked again. I know this uC can be clocked this high, so what's the problem? thanks

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