Keen: Modding

Hmmn, this is difficult; I wish I knew how Keen worked as well as I did with other sprites. I've been trying to make Keen access the sliding behavior when he presses Alt, but it seems I need to add something in before the game will accept that he's sliding, and i don't know what. Drat! I feel so use...

Well, several editors compress or don't compress the levels in various ways; maybe that has something to do with it?

So you mean to tell me all those times I shot a dead bounder into the air for fun, I was really exploiting a nifty piece of code instead of an unintentional bug?

Well I'll be!

The code I have found; I can make it instant, but then Keen goes hyper fast, then crahes; probbably because I'm referencing some pogo code. I give up.

C'mon Xky, where are you now?

Yeah, I have similar problems trying to make other sprites spawn in Keen 1; the only sprites the game likes to spawn are shots and zap/zots which use the $2A $00 $00 code to blank most of their variables; to make something good spawn I've had to fiddle a bit. Even worse are the icecubes; I think I c...

Yeah; it's a dynamic picture; I can edit it while it's still posted, that can cause problems for those who have loaded the page, but it's more convenient to me.

So, does each sprite have different code for erasing the bullet?

On a patch related note, when does the Keen game stop considering a value negative? $FFEF is evidently negative, $00FC is positive, but is say $DDDC positive or negative?

How does your water use only three animation frames?

Update:

Awesome! As soon as I get off this flight, I'll edit the tileset and see if I can add something.

I know they were planning to use sprites to make the Yorp statues work.

'Tis school season, such a pity too.

I have noticed three types of JUMP in Keen; jump (so many places ahead); jump (so many places from some certain adress) and jump (to some absolute place in the file) They are very useful to look for.

I must investigate turning the joystick window into a new Yorp message, it could be accessed by shooting something...

As far as I know the two paths are merely either helping the Licks or the Slugs.

Hmmmn, my Quick Basic won't allow a STRING$ command to add a string to the generated string. (Type mismatch.)

What are jump far and call far instructions? What do they do?