Keen: Modding

To give a bit of background, I figured I'd try my hand at adding in a second Mangling Machine conversation over some of the code for the About ID screen, since that offers well over 3,000 bytes of space if left out. I've run into a problem with the call to $02BD, though, as it's too far away for a ...

I really like the health patch on Keenwiki, but simply getting Ankh time when hit got a little boring. This patch sets up a new Keen behavior (copies stun behavior, but non-animating and with different frames depending on direction) over the unused code at $7F03, then alters the original health code ...

Here's the status box-specific patching: #Disable EKA (Frees $0DE9-$0E21)
%patch $0DE7 $5D $C3
#Score replaces EKA
%patch $0F9C $00
%patch $0F86 $1C
#New sprite used for health (originally 4th frame of Jack); health moved to where score was
%patch $0FDB $B8 $01C4W $50 $8B $C7 $05 $000BW $D1 $E0 $D1 ...

https://preview.ibb.co/e8kGs9/20180912_170959.jpg
EDIT: This is for Keen 3.
EDIT 2: I'm overthinking things. Instead of having an item exit the level and track the pogo from that specific level, I can instead use an unused level (22) and reprogram an item to increase its variable, then track the ...

I think I may have found a better (if smaller) option in the unused demo code at $20DC? For example, if I use the following patch... #New Ball spawning code
%patch $3B1E $E5BCW # Initialization now jumps to $20DC instead of $3E72
%patch $20DC $55 $8B $EC $56 $E8 $3EDAW $8B $F0 $C7 $04 $0008W $8B $46 ...

Due to the way that the behaviors work (The Vortininja is given a jump speed THEN sent to jump) we may well need to simply code up a new behavior for him on the fly.

This actually gave me an idea for getting a bit more freedom with spriting - since there's a lot of free space on the B800 code ...

Still unsure on the Vortininja patch, but after a bit of fumbling I found out the second patch required much less work than I thought:
(Note that the example here only works with the disable EKA patch; if needed you can move it elsewhere, but be sure to set up the $E8 call)
#Disable Extra Keens At ...

Thank you!

Fleexy wrote: Tue Aug 02, 2011 10:26 pm http://files.commanderkeen.org/users/omp/xtkeen3.zip

That? I don't think it would be too hard to port it to K3 if that's not it.

Bit of a necropost, but can someone please reupload xtkeen3.zip if it hasn't been already? That link (and files.commanderkeen.org as a whole) seems to be dead.

I'm using the health patch posted in KeenWiki here with the small difference of using the pogo instead of the red keycard to check for hazard tiles:
#Lives now act as health; Keen dies when hit with 1 health
#SIDE EFFECT: C-T-Space is disabled
%patch $114E $EB $16
%patch $790C $81 $3E $9D1AW $0001W ...

Time's not a huge issue, these should be the last two patches I need and I've barely started on art/levels so I can wait.

On another note, Is there an issue I'm not thinking of with using the extra space for Keen collisions? Using this as reference, I copied what I think is the collision code for ...

Only took five years for me to actually start modding Keen again... Anyway, I was hoping to get help on a couple patches:

> EDIT: Change of plans - I'd actually prefer to keep the original sprites as is, and create new sprites. See post #8.
> Since I've already disabled the Vortimom from shooting ...

This is neat! About some of the other patches though...

1. Why am I even suprised anymore

3. I meant that after playing the yorp stunned effect, the vorticon goes to its standing pose instead of the yorps. Come to think of it, I think that already exists somewhere...

5a. I think it'd be better ...

Bump

Has anything come up with these yet?

Are you using a patch file to playtest? I'm not familiar with Galaxy, but I think is what you need.