Uno cf ProMini handling of micros()

Official Hardware Classic Pro Mini
1

I suspect i know the answer to this question, but I'll ask it anyway.
Background, I have a sketch using interrupts; first interrupt records micros(), second interrupt records micros() again to get the interval between.
The interval is compared to a target and causes a stepper to move CW or CCW depending on greater or less than target.

All works as expected on the Uno. I transferred the sketch to a Pro Mini and now find the sketch works as though the target is half.
The Uno is 16Mhz, the Mini is 8 Mhz.
The question is does the Mini handle micros() same as the Uno? (my thought is that it would).

2

Did you program the Mini for 8MHz?
Chose the right frequency before compilation.

3

Hi DrD, I copied the sketch from the uno to the mini without change. My choices for the board selection were 3.3v 8mhz or 5v 16 mhz. As the board is 5v 8mhz I chose the 5v 16mhz option. If there was a 5v 8mhz option I would have chosen that but it was not in the menu.

4

The voltage irrelevant. Select the 8 MHz option.

6

Thank you both for troubling to answer. Makes perfect sense now.