Claude
bd64b9de5e
The bootleg has no rotary joystick: the game reads the direction the player faces, and fires to, in the upper nibble of the joystick port, and snk_rot8_ikarijpb() sets it from the joystick, so the player fires where he walks. A new 'Aim with Right Stick' setting (a DIP switch that is not on the board, Off by default) makes a pushed right stick set it instead: the player walks with the left stick and aims with the right stick, in 8 directions. With the right stick released, the direction follows the joystick again. The right stick inputs (P1 Aim, P2 Aim) default to the right analog stick of each player, and to I/J/K/L for player 1. They are read only by the driver, not by the game. With the setting Off the game runs as before. Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01N3fzdsnzkQVtgYtYzqepjX
What is MAME 2003-Plus?
MAME 2003-Plus (also referred to as MAME 2003+ and mame2003-plus) is a libretro arcade system emulator core with an emphasis on high performance and broad compatibility with mobile devices, single board computers, embedded systems, and similar platforms.
In order to take advantage of the performance and lower hardware requirements of an earlier MAME architecture, MAME 2003-Plus began with the MAME 2003 codebase which is itself derived from xmame 0.78. Upon that base, MAME 2003-Plus contributors have backported support for an additional 350 games, as well as other functionality not originally present in the underlying codebase.
What games are supported?
View our live compatibility table built using datmagic, a tool created by the MAME 2003-Plus team. Datmagic auto-generates a compatibility table based on the latest XML DAT file. See an incorrect entry? Create a new issue to let us know! This allows us to keep the compatibility table as accurate as possible by fixing it at the source.
Authors: MAMEdev, MAME 2003-Plus team, et al (see LICENSE.md and CHANGELOG.md)
Documentation
User documentation for MAME 2003-Plus can be found in the libretro core documentation library.
Developer documentation can be found in the MAME 2003-Plus wiki.
Development chat
#programming channel of the libretro discord chat server.
Romsets and how to build them for this core
mame2003-plus was originally built from the MAME 0.78 codebase, meaning that 95% or more of MAME 0.78 romsets will work as-is in mame2003-plus, where they immediately benefit from its bugfixes and other improvements. In order to play the new games and games which received ROM updates in mame2003-plus, you will need to find or build the correct romsets.
Read more about rebuilding romsets in the libretro core documentation for mame2003-plus.