Initial commit
This commit is contained in:
commit
59c681004b
GPG Key ID:
C622977DF024AC24
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*[~%]
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source "$BR2_EXTERNAL_COMMANDER_PI16_PATH/package/x16emu/Config.in"
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This is free and unencumbered software released into the public domain.
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Anyone is free to copy, modify, publish, use, compile, sell, or
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distribute this software, either in source code form or as a compiled
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binary, for any purpose, commercial or non-commercial, and by any
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means.
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In jurisdictions that recognize copyright laws, the author or authors
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of this software dedicate any and all copyright interest in the
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software to the public domain. We make this dedication for the benefit
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of the public at large and to the detriment of our heirs and
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successors. We intend this dedication to be an overt act of
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relinquishment in perpetuity of all present and future rights to this
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software under copyright law.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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For more information, please refer to <https://unlicense.org/>
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# Commander Pi16
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This is a collection of buildroot scripts and configuration files that allow
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you to create your own [Commander X16](https://www.commanderx16.com/)
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emulation box based on the Raspberry Pi.
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What you will get **is not a baremetal emulator**: it is not a full Linux
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distribution either but it still runs on top of the Linux kernel.
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The boot time is about 25s on a Raspberry Pi 4 from the firmware splashscreen
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to the CX16 ready prompt.
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This is by no means a finished product: there is still a lot of work to do
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in order to strip down the image to the bare minimum and to improve
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performance, boot time and user experience.
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## Building the bootable image
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On the first line below, you might want to use the mirror at
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`https://github.com/buildroot/buildroot` instead of the official git repo at
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busybox.net .
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```
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git clone https://git.busybox.net/buildroot
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git clone $this_repo_location/commander-pi16
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cd buildroot
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git checkout 2021.02.3 # Check out the latest stable release
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# In the next command you need to pick the defconfig for your rpi version
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# from the table in the next section.
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make BR2_EXTERNAL=../commander-pi16 cpi16_raspberrypi_defconfig
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make menuconfig # Only if you want to customise your build
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make
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```
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This will take a while, especially the first time. Once the build is completed
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you will find a file called `sdcard.img` in `output/images`. Just flash it to
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an sd card using your favourite method.
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Before booting the rpi you will have to drop a ROM image compatible with the
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current emulator version in the root of the FAT32 partition. The file must be
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named `rom.bin`.
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## Supported boards
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| Board | defconfig file |
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|--------------------------|----------------------------------------|
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| Raspberry Pi B+ | cpi16_raspberrypi_defconfig |
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| Raspberry Pi4 B+ | cpi16_raspberrypi4_64_defconfig |
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Note: the Raspberry Pi B+ port is very slow, to the point of being barely
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usable.
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#!/bin/sh
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set -u
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set -e
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# Run x16emu on boot
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if [ -e ${TARGET_DIR}/etc/inittab ]; then
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grep -qE '^tty7::' ${TARGET_DIR}/etc/inittab || \
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sed -i '/HDMI console/a\
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tty7::respawn:/bin/start.sh # run x16emu' ${TARGET_DIR}/etc/inittab
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fi
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configtxt="${BINARIES_DIR}/rpi-firmware/config.txt"
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for arg in "$@";
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do
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case "${arg}" in
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--enable-audio)
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# Enable analog audio
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if ! grep -qE '^dtparam=audio=' "${configtxt}"; then
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echo "Adding 'dtparam=audio=on' to config.txt."
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echo "dtparam=audio=on" >> "${configtxt}"
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fi
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;;
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--overlay=*)
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# Add overlays
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ovlline="dtoverlay=${arg:10}"
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if ! grep -qE '^${ovlline}' "${configtxt}"; then
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echo "Adding '${ovlline}' to config.txt."
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echo "${ovlline}" >> "${configtxt}"
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fi
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;;
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esac
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done
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#!/bin/sh
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fatmnt=/mnt
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x16emu=/bin/x16emu
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x16emuargs=""
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rootlabel=rootfs
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workdir="${fatmnt}/x16"
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romimage="${fatmnt}/rom.bin"
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nvramimage="${fatmnt}/nvram.bin"
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if ! mountpoint -q "${fatmnt}" ; then
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rootdev=$(realpath /dev/disk/by-label/${rootlabel})
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fatdev="${rootdev%2}1"
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[ -d "${fatmnt}" ] || mkdir -p "${fatmnt}"
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mount "${fatdev}" "${fatmnt}" || exit 1
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fi
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if [ -f "${romimage}" ] ; then
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mkdir -p "${workdir}"
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(
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cd "${workdir}"
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"${x16emu}" -rom "${romimage}" -nvram "${nvramimage}" ${x16emuargs}
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)
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else
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echo "Can't find rom.bin in the root directory of the sdcard."
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while true ; do
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sleep 60
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done
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fi
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BR2_aarch64=y
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BR2_cortex_a72=y
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BR2_ARM_FPU_VFPV4=y
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BR2_SHARED_STATIC_LIBS=y
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BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
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BR2_TOOLCHAIN_BUILDROOT_CXX=y
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BR2_GCC_ENABLE_LTO=y
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BR2_GCC_ENABLE_GRAPHITE=y
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BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV=y
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BR2_SYSTEM_DHCP="eth0"
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BR2_ROOTFS_OVERLAY="$(BR2_EXTERNAL_COMMANDER_PI16_PATH)/board/commander-pi16/rootfs_overlay"
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BR2_ROOTFS_POST_BUILD_SCRIPT="board/raspberrypi4-64/post-build.sh $(BR2_EXTERNAL_COMMANDER_PI16_PATH)/board/commander-pi16/post-build.sh"
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BR2_ROOTFS_POST_IMAGE_SCRIPT="board/raspberrypi4-64/post-image.sh"
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BR2_ROOTFS_POST_SCRIPT_ARGS="--add-miniuart-bt-overlay --aarch64 --enable-audio --overlay=vc4-kms-v3d-pi4 --overlay=rpivid-v4l2"
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BR2_LINUX_KERNEL=y
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BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
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BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,raspberrypi,linux,967d45b29ca2902f031b867809d72e3b3d623e7a)/linux-967d45b29ca2902f031b867809d72e3b3d623e7a.tar.gz"
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BR2_LINUX_KERNEL_DEFCONFIG="bcm2711"
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BR2_LINUX_KERNEL_DTS_SUPPORT=y
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BR2_LINUX_KERNEL_INTREE_DTS_NAME="broadcom/bcm2711-rpi-4-b"
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BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
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BR2_PACKAGE_ALSA_UTILS=y
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BR2_PACKAGE_ALSA_UTILS_AMIXER=y
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BR2_PACKAGE_MESA3D=y
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BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_KMSRO=y
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BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_V3D=y
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BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_VC4=y
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BR2_PACKAGE_MESA3D_OPENGL_ES=y
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BR2_PACKAGE_SDL2_KMSDRM=y
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BR2_PACKAGE_SDL2_OPENGLES=y
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BR2_PACKAGE_RPI_FIRMWARE=y
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BR2_PACKAGE_RPI_FIRMWARE_VARIANT_PI4=y
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BR2_PACKAGE_GIFLIB=y
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BR2_TARGET_ROOTFS_EXT2=y
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BR2_TARGET_ROOTFS_EXT2_4=y
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BR2_TARGET_ROOTFS_EXT2_SIZE="120M"
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# BR2_TARGET_ROOTFS_TAR is not set
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BR2_PACKAGE_HOST_DOSFSTOOLS=y
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BR2_PACKAGE_HOST_GENIMAGE=y
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BR2_PACKAGE_HOST_MTOOLS=y
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BR2_PACKAGE_X16EMU=y
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BR2_arm=y
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BR2_arm1176jzf_s=y
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BR2_SHARED_STATIC_LIBS=y
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BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
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BR2_TOOLCHAIN_BUILDROOT_CXX=y
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BR2_GCC_ENABLE_LTO=y
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BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV=y
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BR2_SYSTEM_DHCP="eth0"
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BR2_ROOTFS_OVERLAY="$(BR2_EXTERNAL_COMMANDER_PI16_PATH)/board/commander-pi16/rootfs_overlay"
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BR2_ROOTFS_POST_BUILD_SCRIPT="board/raspberrypi/post-build.sh $(BR2_EXTERNAL_COMMANDER_PI16_PATH)/board/commander-pi16/post-build.sh"
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BR2_ROOTFS_POST_IMAGE_SCRIPT="board/raspberrypi/post-image.sh"
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BR2_ROOTFS_POST_SCRIPT_ARGS="--enable-audio"
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BR2_LINUX_KERNEL=y
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BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
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BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,raspberrypi,linux,967d45b29ca2902f031b867809d72e3b3d623e7a)/linux-967d45b29ca2902f031b867809d72e3b3d623e7a.tar.gz"
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BR2_LINUX_KERNEL_DEFCONFIG="bcmrpi"
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BR2_LINUX_KERNEL_DTS_SUPPORT=y
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BR2_LINUX_KERNEL_INTREE_DTS_NAME="bcm2708-rpi-b bcm2708-rpi-b-plus bcm2708-rpi-cm"
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BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
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BR2_PACKAGE_ALSA_UTILS=y
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BR2_PACKAGE_ALSA_UTILS_AMIXER=y
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BR2_PACKAGE_ALSA_UTILS_APLAY=y
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BR2_PACKAGE_ALSA_UTILS_SPEAKER_TEST=y
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BR2_PACKAGE_MADPLAY=y
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BR2_PACKAGE_SDL2_OPENGLES=y
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BR2_PACKAGE_RPI_FIRMWARE=y
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# BR2_PACKAGE_RPI_FIRMWARE_INSTALL_DTB_OVERLAYS is not set
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BR2_PACKAGE_RPI_USERLAND=y
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BR2_TARGET_ROOTFS_EXT2=y
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BR2_TARGET_ROOTFS_EXT2_4=y
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BR2_TARGET_ROOTFS_EXT2_SIZE="120M"
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# BR2_TARGET_ROOTFS_TAR is not set
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BR2_PACKAGE_HOST_DOSFSTOOLS=y
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BR2_PACKAGE_HOST_GENIMAGE=y
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BR2_PACKAGE_HOST_MTOOLS=y
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BR2_PACKAGE_X16EMU=y
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@ -0,0 +1,2 @@
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name: COMMANDER_PI16
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desc: Turn your Raspberry Pi into a Commander X16
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@ -0,0 +1 @@
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include $(sort $(wildcard $(BR2_EXTERNAL_COMMANDER_PI16_PATH)/package/*/*.mk))
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@ -0,0 +1,11 @@
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config BR2_PACKAGE_X16EMU
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bool "x16emu"
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depends on !BR2_STATIC_LIBS # sdl2
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select BR2_PACKAGE_SDL2
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help
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Emulator for the Commander X16 computer system.
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https://github.com/commanderx16/
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comment "x16emu requires dynamic libraries"
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depends on BR2_STATIC_LIBS
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@ -0,0 +1,28 @@
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################################################################################
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#
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# x16emu
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#
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################################################################################
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X16EMU_VERSION = master
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X16EMU_SITE = $(call github,commanderx16,x16-emulator,$(X16EMU_VERSION))
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X16EMU_LICENSE = BSD-2-Clause
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X16EMU_LICENSE_FILES = LICENSE
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X16EMU_DEPENDENCIES = sdl2
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X16EMU_CFLAGS = -std=c99 -O3 -g0
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X16EMU_CFLAGS += -I$(@D)/src/extern/include -I$(@D)/src/extern/src
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X16EMU_CFLAGS += `$(STAGING_DIR)/usr/bin/sdl2-config --cflags`
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define X16EMU_BUILD_CMDS
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$(TARGET_MAKE_ENV) $(MAKE) \
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CC="$(TARGET_CC)" \
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CFLAGS="$(TARGET_CFLAGS) $(X16EMU_CFLAGS)" -C $(@D)
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endef
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define X16EMU_INSTALL_TARGET_CMDS
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$(TARGET_MAKE_ENV) cp "$(@D)/x16emu" "$(TARGET_DIR)/bin/"
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endef
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$(eval $(generic-package))
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