using xtal pins as clock output

Other Hardware 3rd Party Boards
1

I am building a 68K computer, and am using the ATMEGA324 as sort of a northbridge chip and clock source.I want to know if it is possible to use one of the XTAL/OSC pins on my microcontroller as a clock source to other devices, and which pin to use. Or would doing this screw up the timings to my micro?

2

Yes you can. Read the datasheet as to which of Xtal1 or Xtal2 to use.
Can also burn a fuse to output the system clock on another pin.

3

XTAL2 is the clock output, however, you will probably load the clock.
You might be able connect XTAL2 to a CMOS gate then use its output.

.

4

Program the CKOUT fuse. Processor's clock is output on CLKO / PB1.

5

I can't do that because I need all the I/O pins available. I'll just use XTAL2 as the clock source, but attach it to a buffer.