Ok so I finally did it - I accidently programmed a M128's clock source fuses to 000 by mistake.
So now it expects an external clock source.
*JTAG fuses not set so that is out.
*M128 is soldered to a board so HV is out
What I've tried sofar:
The M128 is on a the ET-BASE board. I've desoldered the 16Mhz Xtal. I've taken the 22pf Cap off the board that was attached to the Xtal1 pin of the Mega128.
I then attached a wire from a Mega32 which was toggling a pin at ~1Mhz. I attached it to the Xtal1 pin of the Mega128.
I then tried programming the M128 - but it didn't work.
On my scope it doesn't appear that the Mega32 is driving the pin low enough.
So what am I doing wrong? Any Suggestions? (I've not done this before).