unit movement points

I recently needed to find the calculation for a damaged unit's movement allowance for an event I want to write for a TOTPP with Lua scenario. https://www.civfanatics.com/civ2/strategy/combatguide/#basics was the only thing I could find, and that is only good when the road multiplier is 3...

I have added event consumption to my game that creates a new unit. The problem is that I'd rather that the unit can't move until the next turn. One reason for this is because of inconsistency — If the unit is created as the last move of the turn the turn ends without the player getting to move...