This file serves as a template for armips assembler that allows to create Mario Kart DS ASM hacks with variable sizes of decrypted ARM9.bin.
Armips assembler programmed by Kingcom can be found under this link: https://github.com/Kingcom/armips
The script was made with an ARM9.bin decrypted by Gericom's Every File Explorer, though any method of decryption of ARM9 should work as well.
This isn't the only method of assembling custom code for Mario Kart DS (either an old version of Gericom's MKDS Course Modifier or Dirbaio's NSMBe can be used), but this template can ensure that your code will become compatible with a cross-platform tool in active development.
The bare template does not require any additional packages, which makes it a lightweight and easy solution. Building object files in C however requires compilation for an ARM platform with a compiler such as arm-none-eabi-gcc or, for perfect compatibility, Nintendo's in-house compiler in Metrowerks's CodeWarrior package (mwccarm version 2).
Due to the way Autoload Tables are being generated by this script, a minimal length of a custom data section 0x20 is necessary for the script to work correctly.
Every time an instruction in the script is commented out, script needs to run on original ARM9.bin again.