1.03 consists of a loader, located in src/loader, which is built into a Melee save file using dansalvato's Melee GCI Compiler, and the mod itself, located in src/mod.

The loader is executed upon entering Name Entry using the standard nametag buffer overflow exploit. The loader then copies itself out of the nametag region and reads the 103Code save (output as ssbm-1.03-$(MODVERSION).gci) containing the mod from the memory card into main memory. 103Code contains a full copy of 1.03 for Melee NTSC 1.02 and diffs against this copy for other game versions, which the loader will apply if necessary. The loader then executes the mod entry point and makes Melee load an alternate save file that won't trigger the nametag overflow.

1.03 uses this two-stage loading process because its main binary is too large to fit in a Melee save file.

You need to have devkitPro installed, and the environment variable DEVKITPRO must be set to your devkitPro install path.

You need at least Python 3.6.

You need to install the pypng Python library.

• Example: pip install pypng

All submodules in the 1.03 repo must be cloned.

• Example: git submodule update --init --recursive

Invoke make with VERSION set to one of 102, 101, 100, or PAL. This indicates the target Melee version.

NOPAL may be specified to exclude PAL, 20XX, and UnclePunch support from the build. This helps 1.03 fit on 4Mb memory cards.

BETA may be specified to include a version watermark on the character select screen.

MODVERSION may be specified to add a suffix to the output gci filenames. MODVERSION may imply other build options.

• If MODVERSION starts with "a" followed by a digit, hyphen, or EOL, NOPAL is implied.
• • Example: MODVERSION=a3.4
• If MODVERSION contains "beta" or "rc" followed by a digit, hyphen, or EOL at the start or after a hyphen, BETA is implied.
• • Example: MODVERSION=b3.4-beta1

USERDEFS may be specified to supply additional preprocessor macros. Additional functionality may be added using the following macros:

• CYAN_CSS_READY - Recolor the "Ready to fight!" banner to cyan
• OLD_CSS_TOGGLES - Allow CSS toggles for 1.03 controls like the first version of 1.03
• POLL_DEBUG - Show debug information on the game's input poll/fetch timing and latency
• POLL_DEBUG_VERBOSE - Show additional poll debug info
• UCF_TOGGLE - Reinstate the UCF toggle in the additional rules menu

Example make command:

make -j8 USERDEFS=OLD_CSS_TOGGLES VERSION=PAL MODVERSION=b3.4

NTSC 1.02 must be built before any other versions, as all other versions are stored as a diff against the 1.02 build. If the 1.02 version is rebuilt, all other versions must also be rebuilt to be valid.