> This is a clock for a processor implemented in an fpga. The division
> comes about because there is a uart implemented as well inside the
> processor to avoid framing errors. So, yes, it is a square wave. -Vic

You could do it with a 4040 and a 4-input AND gate. Take the logic
outputs for hA3 = %10100011 (a0,a1,a5,a7) and AND them together,
with the output going to the 4040's reset to clear the 4040 back to
all zero outputs. A pulse will be produced each time a0&a1&a5&a7

I use this method to do long division in h/w when counting mains
cycles but you may find that the 4040 @ 5V won't take 12.5MHz.
The 74HC4040 probably would, and any TTL binary counter will

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