The external clock is running fine but I don't understand something.
I have a Mega48 in the Stk500 running a 20MHZ external OSC. The clock is connected to PortE XT1. Typically I program tiny13's in the extended board I made using the 10 pin PortB connector. I originally thought I could just put the clock signal in portB6 on the portb 10 pin header but I see from the scope that this pin must be disconnected when the XTAL1 jumper is removed, is that correct? I get 20MHZ on the chip portb6 but on the 10 pin header I get nada.
Picture of setup attached.