Initial ROM editing Set-Up

1.- In VSCode press Ctrl+P to search for a file in the environment. Search for rom_headers.s and open it

../_images/header.png

2.- Change the region from “P” to “E” and press Ctrl+S to save the changes

../_images/region.png

Note

P is PAL and E is NTSC (PAL runs at 16 fps and NTSC runs at 20 fps)

3.- Press again Ctrl+P, search Makefile and open it

4.- Modify lines 10, 12 and 16 as shown in the image

../_images/compiler.png

5.- Modify all: section to add a destination folder where save the modified rom when compiled

Note

You can find all section by pressing Ctrl+F and searching for all:

cp $(ROM) /mnt/c/Users/megab/Desktop/
../_images/cp_rom.png

Warning

You need to use tabulations in this file. If you use spaces, it will fail

6.- Solve opening in-game menu crash in emulator

  • 1.- Press Ctrl+P in VSCode, search for a file called z_map_exp.c and open it

  • 2.- Press Ctrl+F and search for Minimap_Draw(

  • 3.- Change the <= in the first if statement with only <

../_images/solve_map.png


EXTRA: Dedicate more memory to show link holding item models

This step is comletly optional and it will only be useful if, in the future, you want to model an obtainable item wich size is greater than the maxumum (12Kb)

What we are going to do is increase that maximum size to 44Kb and this should not have any negative impact in the game (at least in emulator)

Note

The models that I’m talking about is the ones that are used when link gets a new item (geting kokiri sword from the chest and having it rotate over links hands)

  • 1.- Press Ctrl+P in VSCode, search for a file called z_player.c and open it

  • 2.- Press Ctrl+F and search for malloc

  • 3.- Change the 0x3008 inside the parentesis with 0xB008

../_images/model_size.png