lr-NP2Kai: A PC-9801 libretro core

SuperFromND

Repository: https://github.com/AZO234/NP2kai

Build with the commands cd np2kai/sdl2 and make -j4
The resulting core is np2kai_libretro.so, located in np2kai/sdl2.

You will need to copy the following BIOS files into /home/pi/RetroPie/BIOS/np2kai:

2608_bd.wav 
2608_hh.wav
2608_rim.wav
2608_sd.wav
2608_tom.wav 
2608_top.wav
bios.rom
FONT.ROM
sound.rom

I've only tested one game so far, Lotus Land Story, and it runs slowly but is still fairly playable.

SuperFromND

Update: I figured out how to write setup scripts! Here's the script for you to copy into a .sh file:

#!/usr/bin/env bash

# This file is part of The RetroPie Project
#
# The RetroPie Project is the legal property of its developers, whose names are
# too numerous to list here. Please refer to the COPYRIGHT.md file distributed with this source.
#
# See the LICENSE.md file at the top-level directory of this distribution and
# at https://raw.githubusercontent.com/RetroPie/RetroPie-Setup/master/LICENSE.md
#

rp_module_id="lr-np2kai"
rp_module_desc="PC98 emu - Modified Neko Project II port to libretro"
rp_module_help="ROM Extensions: .d88 .d98 .88d .98d .fdi .xdf .hdm .dup .2hd .tfd .hdi .thd .nhd .hdd\n\nCopy your pc98 games to to $romdir/pc98\n\nCopy bios files 2608_bd.wav, 2608_hh.wav, 2608_rim.wav, 2608_sd.wav, 2608_tom.wav 2608_top.wav, bios.rom, FONT.ROM and sound.rom to $biosdir/np2"
rp_module_section="exp"

function sources_lr-np2kai() {
    gitPullOrClone "$md_build" https://github.com/AZO234/NP2kai.git
}

function build_lr-np2kai() {
	cd ./sdl2
    make -j4
    md_ret_require="$md_build/sdl2/np2kai_libretro.so"
}

function install_lr-np2kai() {
    md_ret_files=(
        'sdl2/np2kai_libretro.so'
    )
}

function configure_lr-np2kai() {
    mkRomDir "pc98"
    ensureSystemretroconfig "pc98"

    addEmulator 1 "$md_id" "pc98" "$md_inst/np2kai_libretro.so"
    addSystem "pc98"
}

SuperFromND

Second Update: The above setup script is no longer needed, as lr-np2kai is now officially a part of RetroPie! Simply go to the Experimental menu in RetroPie Setup, and select lr-np2kai. More info can be found here.

Enjoy!

darknior

WOAW great news :)
I love this system and already made my game pack :p
Have you try it to know if this emulator works fine ?
Thanks

SuperFromND

@darknior I've tested on the Pi 3 non-overclocked; it's ever-so-slightly too slow to run most of the games you'd probably want to run (Flame Zapper, Touhou, etc.), but you can somewhat remedy this by messing with the CPU multiplier in the options (somewhere between 4x and 8x with a 2Mhz base clock works out best).

wihaedud

Wow that's awesome :) Hopefully, there will be future builds with better performance.

Btw... How can you map controller inputs to keyboard inputs? The first two Touhou Games don't support a Joypad.

SuperFromND

@wihaedud I don't think that's a thing yet unfortunately, however this is apparently going to be fixed in the next RetroArch update.