turned based

i saw a few post for turned based rpgs but cant seem to find a working download or example anywhere does any one have an idea how to handle turns bassed on iniative of players and enemies or know where i can download the few examples that were posted some time ago?

This is how Wade_Adams and Grimbar helped me with my Borderline Conflict
demo level.

entity* player1;
entity* player2;
entity* current_player;
var in_the_air = 1;


Function main()
{

current_player = player1;//just to have an auto start player
}

function switch()
{

in_the_air = 1;
if (current_player==player1) // end turn so switch to other player
{

current_player = player2;//change to 1 to have only one player
}
else
{
current_player = player1;
}

}
on_tab switch;// or set it so that the switch is triggered by an
explosion, shot or time period.