From 3f4346bb927f8e858cbb05f8550c63bc9feb7829 Mon Sep 17 00:00:00 2001
From: GNU <dexterkidd@gmail.com>
Date: Mon, 24 Jul 2023 14:23:52 +0800
Subject: [PATCH] Created How uConsole CM4 os image made (markdown)

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+Based on 4d990ec702d0b6383f6e43bbeb3e3274 http://dl.clockworkpi.com/DevTerm_CM4_v0.1a_64bit.img.bz2
+
+Since uconsole and devterm are using the same main board 
+
+Just need to update a new kernel for uconsole LCD screen
+
+## Kernel
+
+https://github.com/clockworkpi/uConsole/tree/master/Code/patch/cm4/20230630
+
+Create a deb file of uconsole_kernel_cm4-rpi based on kernel compiled output files 
+
+
+## Chroot
+Chroot into DevTerm_CM4_v0.1a_64bit.img
+by
+```
+sudo mkdir -p /mnt/p1
+sudo losetup --show -f -P  DevTerm_CM4_v0.1a_64bit.img #assume loop0
+sudo mount /dev/loop0p2 /mnt/p1
+sudo mount /dev/loop0p1 /mnt/p1/boot
+
+cd /mnt/p2
+sudo mount --bind /dev dev/
+sudo mount --bind /sys sys/
+sudo mount --bind /proc proc/
+sudo mount --bind /dev/pts dev/pts
+#sudo mv etc/ld.so.preload etc/ld_so_preload
+sudo chroot .
+```
+
+## In chroot
+
+```
+sudo apt update
+#update kernel
+sudo apt install -y uconsole_kernel_cm4-rpi 
+#install additional games/emulators
+sudo apt install -y devterm-tic80-cpi uconsole-love2d retroarch dosbox  devterm-cavestory-cpi-cm4 mame uconsole-liko12 uconsole-lowresnx opentyrian openttd minetest uconsole-dosbox-staging pppoe
+
+#for 4G extension
+sudo bash -c 'cat << EOF > /etc/modprobe.d/blacklist-qmi.conf
+blacklist qmi_wwan
+blacklist cdc_wdm
+EOF'
+
+# uconsole does not have thermal printer
+sudo apt remove devterm-thermal-printer devterm-thermal-printer-cm4 # uconsole does not have thermal printer
+
+#pre configs
+cd /usr/local/bin/
+git clone -b  uconsole-cm4 https://github.com/cuu/skel.git
+cp -rf skel/etc/xdg/autostart/first-touch.desktop /etc/xdg/autostart/
+cp -rf skel/usr/local/bin/chgpas.sh /usr/local/bin/
+
+#remove old configs for screen rotation,since new uconsole cm4 kernel did screen rotation 
+
+nano /boot/cmdline.txt ,remove   "fbcon=rotate:1"  
+rm -rf /etc/X11/Xsession.d/90custom_xrandr  
+rm -rf /etc/lightdm/setup.sh  
+edit /etc/lightdm/lightdm.conf  
+comment out or delete line :  
+ "greeter-setup-script=/etc/lightdm/setup.sh"  
+
+exit #quit chroot
+```
+
+## Clean chroot 
+
+do it everytime when you are done with chroot enviroment  
+
+```
+cd -
+sudo umount /mnt/p1/dev/pts
+sudo umount /mnt/p1/dev
+sudo umount /mnt/p1/proc
+sudo umount /mnt/p1/sys
+##clear bash 
+sudo rm -rf /mnt/p1/root/.bash_history
+sudo umount /mnt/p1/boot
+sudo umount /mnt/p1
+sudo losetup -D /dev/loop0
+```
+
+That'it , happy hacking 
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