Modifications to prince.exe (hex editing)

[atrueprincefanfrom18]

I'm not sure if this can be done on Apoplexy where you have a wall that has a floor function instead of a wall, or a wall that is empty (meaning you can go through it)? Or graphics have to be changed? If so, what can be used to change the graphics?

Press "x" (or Ctrl+click on a tile) to go to the native tiles screen.
It has tiles that only work with SDLPoP/MININIM.
The first tab has all the fake tiles, including floors/spaces that look like walls.

Yes. And Shauing if you want the walls that are actually tile, you'll have to change some graphics. You can take a look at the Repetition Of Time mod's graphics.

[Shauing]

How do you change the graphics here on DOS? What software are you all using to change the background and character sprites?

[Emiliano]

How do you change the graphics here on DOS? What software are you all using to change the background and character sprites?

Hi Shauing, Use PR, you can get it from popot, there are also instrucions for it
Put cmd in bin folder and type
PR --export file.dat-- and try again until you get the wanted file, for changes made, use PR --import (several files at once)
You can only use 16 colors, make sure to don't use more.
Finally edit pal files to change colors

[Shauing]

Is there a way to code to insert stuff from SNES such as the teleporters, fire and crusher traps? Not sure if memory/sprite slot issues might not permit this, but if at least the teleporters could be used (and sprite-wise could just reuse the exit level animation)?

[Emiliano]

Is there a way to code to insert stuff from SNES such as the teleporters, fire and crusher traps? Not sure if memory/sprite slot issues might not permit this, but if at least the teleporters could be used (and sprite-wise could just reuse the exit level animation)?

I don't know, DOS has a limited memory and it is too much for it
Some things should be replaced with other obstacles.

[Shauing]

Hmm, that's all right.
I'm having trouble with PR, I'm trying to follow the tutorial but keep getting this error:

[Emiliano]

Hmm, that's all right.
I'm having trouble with PR, I'm trying to follow the tutorial but keep getting this error:
PRError.png

Replace files.dat with the name of the file, it was just an example

[Shauing]

Hmm, that's all right.
I'm having trouble with PR, I'm trying to follow the tutorial but keep getting this error:
PRError.png

Replace files.dat with the name of the file, it was just an example

I was trying to pull out the resources.xml file but keeps getting that error; it wasn't the 'files.dat' example you gave.

[atrueprincefanfrom18]

Is there a way to code to insert stuff from SNES such as the teleporters, fire and crusher traps? Not sure if memory/sprite slot issues might not permit this, but if at least the teleporters could be used (and sprite-wise could just reuse the exit level animation)?

In DOS, most likely it's impossible but it might be possible to do in SDLPoP. Maybe David/dmitrys can explain the technical stuff.

[Norbert]

Is there a way to code to insert stuff from SNES such as the teleporters, fire and crusher traps? Not sure if memory/sprite slot issues might not permit this, but if at least the teleporters could be used (and sprite-wise could just reuse the exit level animation)?

[...] it might be possible to do in SDLPoP.

Yes. Technically, it's certainly possible with SDLPoP. Particularly teleporters of some sort should be relatively easy to implement. Even with their own legacy combos. These SNES tiles are already listed as an idea for SDLPoP here.

As for PR, the "Windows batch file" downloadable here should make using PR easy. If it's not sufficient, I and others could attempt improving that batch file until it is.

[Shauing]

Yes. Technically, it's certainly possible with SDLPoP. Particularly teleporters of some sort should be relatively easy to implement. Even with their own legacy combos. These SNES tiles are already listed as an idea for SDLPoP here.

As for PR, the "Windows batch file" downloadable here should make using PR easy. If it's not sufficient, I and others could attempt improving that batch file until it is.

Hopefully it is possible to implement, otherwise porting Level 5 of The Queen Of Light to DOS won't be possible and I'll have to basically do a replacement level.

Hmm, I'll try to get it to work somehow.
EDIT: It's still outputting an unknown file instead of exporting the files. Maybe by watching some images/video about how to export the resources would be nice?

[Norbert]

EDIT: It's still outputting an unknown file instead of exporting the files. Maybe by watching some images/video about how to export the resources would be nice?

Can you screen record what you do, and share that video recording with us.
Then we can see what you're doing, and hopefully provide suggestions.

[Shauing]

EDIT: It's still outputting an unknown file instead of exporting the files. Maybe by watching some images/video about how to export the resources would be nice?

Can you screen record what you do, and share that video recording with us.
Then we can see what you're doing, and hopefully provide suggestions.

[David]

In my mod, I was able to make shadow moon walk by assigning 1 into the direction. It flipped sprite images to the left but the forward movement was happening to the right.

You can do the same to the prince if you set the his starting direction to 1 in the level data with a hex editor.
Apoplexy will crash if you try load such a level, though.

There was a side effect to this hack that caused the fall_y speed to be set to some value that caused the shadow to fall, then appear at the top of the screen, then fall again.

The above hack didn't cause this for me, but this also happens if the prince falls into the shadow's room.
(See here: viewtopic.php?p=15740#p15740)

[Norbert]

Apoplexy will crash if you try load such a level, though.

I've not tested, but probably you mean "exit", maybe with the "[FAILED] Wrong dir.!" notice? I think "crash" would imply it additionally stopped functioning properly, e.g. read invalid memory.