How many different rooms there are in Atari XL Donkey Kong Jr.?

[mäsäxi]

Hello!

 

I am aware that rooms are looping, that´s why I am asking how many *different* rooms there are?

[Rybags]

4, same as the arcade.

[mäsäxi]

Thank you! Though I remembered arcade had five, but maybe I am mistaken.