Have you tried writing any boards.txt files that let you write directly to a virgin ATMega328 or 168 like you did with the ATtiny84/5?
Yes. It works very well. Tiny Tuner (an unpublished version) works well to tune the internal oscillator. I'll try to get a Tiny Tuner update out this weekend that includes 328 / 168 support.
It would be huge to not need to load a bootloader to them- like the ATtiny85
It is nice! I should be able to deliver another Tiny Core update this weekend. I'll include 328 and 168 entries in boards.txt.
Do you use virgin 328 / 168 processors with or without an external 16 MHz crystal? How do you typically power the processor? Direct from batteries? +5V regulated?
But maybe I am unaware of obstacles in doing your magic with more AVRs.
No obstacles. It works well. And, for the record, while I'd like to be that clever, it isn't my magic. But, as I've always said, the best idea is a stolen one.
In case you need an entry or an alternative to the one that will be in the Tiny Core... I believe there is a "breadboard 328" entry available in the playground that should serve the same purpose. I vaguely recall publishing an entry in the old forum.
The ATtiny85 port has been working like a charm
Excellent! There are a few simple things that can be done to dramatically improve it. I think that's next on the list.
I have shown quite a few others how to do it, here at work
Hmmm. Sounds to me like you have some "teacher" in you. Care to apply that skill to some documentation?
You are welcome!