initial commit

.gitignore

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+.idea

README.md

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+# RetroPie 4.4 for Sixteenbit Systems
+
+Scripts for setting up RetroPie on a Gameboy Zero.
+
+## What's in the box
+
+1. Optimized [config.txt](settings/config.txt) which includes overclocking
+1. Download Gameboy Zero splashscreen by [AJRedfern](https://www.sudomod.com/forum/viewtopic.php?f=8&t=1440)
+1. Install the gbz35 theme and set it as default
+1. Install the gbz35-dark
+1. Enable 30sec autosave on roms
+1. Disable 'wait for network' on boot
+
+## Flashing the pre-configured image
+
+A preconfigured image is available to flash at https://github.com/sixteenbit/retropie-i2s/releases. Download the latest release and flash the .img to an SD card (e.g. using [Etcher](https://etcher.io/) or [Apple Pi Baker](https://www.tweaking4all.com/software/macosx-software/macosx-apple-pi-baker/))
+
+## Running the installer
+
+1. Download RetroPie from the [official site](https://retropie.org.uk/download/)
+1. Flash the .img to an SD card (e.g. using [Etcher](https://etcher.io/) or [Apple Pi Baker](https://www.tweaking4all.com/software/macosx-software/macosx-apple-pi-baker/))
+1. Enable WIFI and SSH
+1. `git clone https://github.com/sixteenbit/retropie-i2s.git`
+1. `cd retropie-i2s`
+1. `sudo ./install.sh YES`
+1. `sudo reboot now`
+
+## Post installation
+
+### Update all the things
+
+```bash
+sudo apt-get update; sudo apt-get upgrade -y;
+```
+
+### Install Retrogame
+
+```bash
+cd; curl https://raw.githubusercontent.com/adafruit/Raspberry-Pi-Installer-Scripts/master/retrogame.sh >retrogame.sh
+sudo bash retrogame.sh
+```
+
+### Install i2s Script
+
+```bash
+curl -sS https://raw.githubusercontent.com/adafruit/Raspberry-Pi-Installer-Scripts/master/i2samp.sh | bash
+```
+
+### Install Battery Monitor
+
+This is a [modified version](https://github.com/sixteenbit/Mintybatterymonitor) of HoolyHoo's [Mintybatterymonitor](https://github.com/HoolyHoo/Mintybatterymonitor).
+
+1. `wget https://raw.githubusercontent.com/sixteenbit/Mintybatterymonitor/master/MintyInstall.sh`
+1. `sudo git clone https://github.com/sixteenbit/Mintybatterymonitor.git`
+1. `sudo chmod 777 MintyInstall.sh`
+1. `sudo ./MintyInstall.sh`
+1. `sudo reboot now`
+
+
+## Credits
+
+- Installer script originally built by [Kite](https://github.com/kiteretro/Circuit-Sword) for the Circuit Sword but has been re-purposed for Gameboy Zero.
+- MintyBatteryMonitor is a modified version of [HoolyHoo's](https://github.com/HoolyHoo/Mintybatterymonitor).
+- Splashscreen was created by [AJRedfern](https://www.sudomod.com/forum/viewtopic.php?f=8&t=1440)

install.sh

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+#!/bin/bash
+
+#
+# Author: Justin Peacock
+#
+# THIS HEADER MUST REMAIN WITH THIS FILE AT ALL TIMES
+#
+# This firmware is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This firmware is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this repo. If not, see <http://www.gnu.org/licenses/>.
+#
+
+if [ "$EUID" -ne 0 ]
+  then echo "Please run as root (sudo)"
+  exit 1
+fi
+
+if [ $# == 0 ] || [ $# == 3 ] ; then
+  echo "Usage: ./<cmd> YES [branch] [fat32 root] [ext4 root]"
+  exit 1
+fi
+
+#####################################################################
+# Vars
+
+if [[ $3 != "" ]] ; then
+  DESTBOOT=$3
+else
+  DESTBOOT="/boot"
+fi
+
+if [[ $4 != "" ]] ; then
+  DEST=$4
+else
+  DEST=""
+fi
+
+GITHUBPROJECT="custom-systems"
+GITHUBURL="https://github.com/sixteenbit/$GITHUBPROJECT"
+PIHOMEDIR="$DEST/home/pi"
+BINDIR="$PIHOMEDIR/$GITHUBPROJECT"
+USER="pi"
+
+if [[ $2 != "" ]] ; then
+  BRANCH=$2
+else
+  BRANCH="master"
+fi
+
+#####################################################################
+# Functions
+execute() { #STRING
+  if [ $# != 1 ] ; then
+    echo "ERROR: No args passed"
+    exit 1
+  fi
+  cmd=$1
+
+  echo "[*] EXECUTE: [$cmd]"
+  eval "$cmd"
+  ret=$?
+
+  if [ $ret != 0 ] ; then
+    echo "ERROR: Command exited with [$ret]"
+    exit 1
+  fi
+
+  return 0
+}
+
+exists() { #FILE
+  if [ $# != 1 ] ; then
+    echo "ERROR: No args passed"
+    exit 1
+  fi
+
+  file=$1
+
+  if [ -f $file ]; then
+    echo "[i] FILE: [$file] exists."
+    return 0
+  else
+    echo "[i] FILE: [$file] does not exist."
+    return 1
+  fi
+}
+
+#####################################################################
+# LOGIC!
+echo "INSTALLING.."
+
+# Checkout code if not already done so
+if ! exists "$BINDIR/LICENSE" ; then
+    execute "git clone --recursive --depth 1 --branch $BRANCH $GITHUBURL $BINDIR"
+fi
+execute "chown -R $USER:$USER $BINDIR"
+
+#####################################################################
+# Copy required to /boot
+
+#if ! exists "$DESTBOOT/config_ORIGINAL.txt" ; then
+#  execute "cp $DESTBOOT/config.txt $DESTBOOT/config_ORIGINAL.txt"
+#  execute "cp $BINDIR/settings/config.txt $DESTBOOT/config.txt"
+#fi
+
+#####################################################################
+# Copy required to /
+
+# Copy splashscreens
+execute "cp $BINDIR/splashscreens/GBZ-Splash-Screen.mp4 $PIHOMEDIR/RetroPie/splashscreens/GBZ-Splash-Screen.mp4"
+
+# Copy retrogame config
+#execute "cp $BINDIR/settings/retrogame.cfg $DEST/boot/splashscreens/retrogame.cfg"
+
+# Copy USB sound
+#execute "cp $BINDIR/settings/asound.conf $DEST/etc/asound.conf"
+
+# Fix splashsreen sound
+if exists "$DEST/etc/init.d/asplashscreen" ; then
+    execute "sed -i \"s/ *both/ alsa/\" $DEST/etc/init.d/asplashscreen"
+fi
+if exists "$DEST/opt/retropie/supplementary/splashscreen/asplashscreen.sh" ; then
+    execute "sed -i \"s/ *both/ alsa/\" $DEST/opt/retropie/supplementary/splashscreen/asplashscreen.sh"
+fi
+
+# Install the gbz35 theme and set it as default
+if ! exists "$DEST/etc/emulationstation/themes/gbz35/gbz35.xml" ; then
+    execute "mkdir -p $DEST/etc/emulationstation/themes"
+    execute "rm -rf $DEST/etc/emulationstation/themes/gbz35"
+    execute "git clone --recursive --depth 1 --branch master https://github.com/rxbrad/es-theme-gbz35.git $DEST/etc/emulationstation/themes/gbz35"
+    execute "cp $BINDIR/settings/es_settings.cfg $DEST/opt/retropie/configs/all/emulationstation/es_settings.cfg"
+    execute "sed -i \"s/carbon/gbz35/\" $DEST/opt/retropie/configs/all/emulationstation/es_settings.cfg"
+    execute "chown $USER:$USER $DEST/opt/retropie/configs/all/emulationstation/es_settings.cfg"
+fi
+
+# Install the gbz35-dark theme
+if ! exists "$DEST/etc/emulationstation/themes/gbz35-dark/gbz35.xml" ; then
+    execute "mkdir -p $DEST/etc/emulationstation/themes"
+    execute "rm -rf $DEST/etc/emulationstation/themes/gbz35-dark"
+    execute "git clone --recursive --depth 1 --branch master https://github.com/rxbrad/es-theme-gbz35-dark.git $DEST/etc/emulationstation/themes/gbz35-dark"
+fi
+
+# Enable 30sec autosave on roms
+execute "sed -i \"s/# autosave_interval =/autosave_interval = \"30\"/\" $DEST/opt/retropie/configs/all/retroarch.cfg"
+
+# Disable 'wait for network' on boot
+execute "rm -f $DEST/etc/systemd/system/dhcpcd.service.d/wait.conf"
+
+#####################################################################
+# DONE
+echo "DONE!"

settings/i2s/retrogame.cfg

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+# Sample configuration file for retrogame.
+# Really minimal syntax, typically two elements per line w/space delimiter:
+# 1) a key name (from keyTable.h; shortened from /usr/include/linux/input.h).
+# 2) a GPIO pin number; when grounded, will simulate corresponding keypress.
+# Uses Broadcom pin numbers for GPIO.
+# If first element is GND, the corresponding pin (or pins, multiple can be
+# given) is a LOW-level output; an extra ground pin for connecting buttons.
+# A '#' character indicates a comment to end-of-line.
+# File can be edited "live," no need to restart retrogame!
+
+# Here's a pin configuration for the PiGRRL 2 project:
+
+LEFT      23  # Joypad left
+RIGHT     24  # Joypad right
+UP        27  # Joypad up
+DOWN      22  # Joypad down
+LEFTCTRL  13  # 'A' button
+LEFTALT   12  # 'B' button
+Z         20  # 'X' button
+X         16  # 'Y' button
+SPACE      5  # 'Select' button
+ENTER      6  # 'Start' button
+A         17  # Left shoulder button
+S         26  # Right shoulder button
+
+# For configurations with few buttons (e.g. Cupcade), a key can be followed
+# by multiple pin numbers.  When those pins are all held for a few seconds,
+# this will generate the corresponding keypress (e.g. ESC to exit ROM).
+# Only ONE such combo is supported within the file though; later entries
+# will override earlier.

settings/usb/asound.conf

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+pcm.!default {
+  type hw card 1
+}
+ctl.!default {
+  type hw card 1
+}

settings/usb/config.txt

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+# For more options and information see
+# http://rpf.io/configtxt
+# Some settings may impact device functionality. See link above for details
+
+# uncomment the following to adjust overscan. Use positive numbers if console
+# goes off screen, and negative if there is too much border
+#overscan_left=16
+#overscan_right=16
+#overscan_top=16
+#overscan_bottom=16
+
+# Additional overlays and parameters are documented /boot/overlays/README
+
+# Enable audio (loads snd_bcm2835)
+dtparam=audio=on
+gpu_mem_256=128
+gpu_mem_512=256
+gpu_mem_1024=256
+overscan_scale=1
+dtparam=i2c_arm=on
+
+# Disable Pi Status LED
+dtparam=act_led_trigger=none
+dtparam=act_led_activelow=on
+
+# Disable Bluetooth
+# dtoverlay=pi3-disable-bt
+
+# Disable Rainbow Splash
+disable_splash=1
+
+# Overclocking
+arm_freq=1000
+gpu_freq=500
+core_freq=500
+sdram_freq=500
+sdram_schmoo=0x02000020
+over_voltage=2
+sdram_over_voltage=2
+
+# Rotate display
+display_rotate=2

settings/usb/es_settings.cfg

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+<?xml version="1.0"?>
+<bool name="BackgroundJoystickInput" value="false" />
+<bool name="DrawFramerate" value="false" />
+<bool name="EnableSounds" value="true" />
+<bool name="ParseGamelistOnly" value="false" />
+<bool name="QuickSystemSelect" value="true" />
+<bool name="SaveGamelistsOnExit" value="true" />
+<bool name="ScrapeRatings" value="true" />
+<bool name="ShowHelpPrompts" value="true" />
+<int name="MaxVRAM" value="100" />
+<int name="ScraperResizeHeight" value="0" />
+<int name="ScraperResizeWidth" value="400" />
+<int name="ScreenSaverTime" value="300000" />
+<string name="Scraper" value="TheGamesDB" />
+<string name="ScreenSaverBehavior" value="dim" />
+<string name="ThemeSet" value="carbon" />
+<string name="TransitionStyle" value="fade" />