MarcAtari

Neither really have "null rooms" per se...but if you change the room number in Adventure you get the game select screen, which is just an empty room with the number 1, 2, or 3 in the center. It's an actual room. You can also get to it if you are on the game select screen, and move the joystick a bit, then your square character icon appears at the bottom. In game play, you can set the game number register to this screen, etc. In Haunted house, there is a register that hold the "floor" number...if you set it to 0 or a high number, you can enter a "floor" of the house that has no exits. Again, not really an intentional null room like the one in Superman, but rather an anomaly with similar characteristics.

def not an EE, but the room is not an accident either. it's defined as an actual room, called the null room, and the exits are all pointed to itself. and, when an object is supposed to be put out of game play, it is assigned to that room. the object continues to do what it does (like bad guys still walk around in it, etc) you just can't ever get there. and, the objects can't ever leave on their own either. so it really is a "jail" in a way. when you overwrite location $9B with the number 0, you assign Clark's room number to the null room. It is given the graphics pointer of Subway, and color orange, so it is definitely a deliberate choice of the programmer to make it a room. The clever part is that with only 4 or 5 lines of definition code to make the null room, the programmer gets the advantage of saving quite a lot of game play code by just throwing items in there that put out of play...then it doesn't matter how they walk around, they never interact with anything anyway...kinda slick. anyway, hope you enjoy. in Adventure, there is a similar room...it is the game select screen which has a number 1, 2, or 3 in the center. If you overwrite the player's game position to this room, you wind up in it and can't leave. I wonder if Raiders has this...I haven't looked at it yet. Haunted House has one, but it is not a deliberate programmer null room for that purpose...it is just a quirk that if you set the floor to 4 (which is actually floor 5), you wind up in a weird place. fun stuff...

I'm not sure if this qualifies as an "easter egg"or not, but I discovered a hidden room in Superman (for the 2600). It was in the disassembly of the game, called the Null Room, where the game puts all the items that wind up out of play (like when you drop a bad guy into the jail for example) If you use Stella or other emulator, you can change the room number to number 0, which puts you into this hidden room. I posted two videos here... and I also found similar things in Adventure and Haunted House...if anyone is interested... Marc