RetroGame
如何替換系統
如果使用者想要替換自己編譯的系統，如：Buildroot，只要保留SDCard前8MB的Uboot以及Kernel即可，過程如下說明：
1. 從原本的SDCard提取UBoot和Kernel檔案
$ sudo dd if=/dev/mmcblk0 of=head.img bs=1M count=8
2. 格式化SDCard並保留前8MB空間
3. 把編譯後的rootfs.tar解壓縮到SDCard根目錄
4. 還原原廠UBoot和Kernel檔案
$ sudo dd if=head.img of=/dev/mmcblk0 bs=512 skip=1 seek=1
5. 更新inittab檔案
$ sudo vim etc/inittab
# /etc/inittab # # Copyright (C) 2001 Erik Andersen <andersen@codepoet.org> # # Note: BusyBox init doesn't support runlevels. The runlevels field is # completely ignored by BusyBox init. If you want runlevels, use # sysvinit. # # Format for each entry: <id>:<runlevels>:<action>:<process> # # id == tty to run on, or empty for /dev/console # runlevels == ignored # action == one of sysinit, respawn, askfirst, wait, and once # process == program to run # Startup the system ::sysinit:/bin/mount -t proc proc /proc ::sysinit:/bin/mount -t sysfs sysfs /sys ::sysinit:/bin/mount -o size=64k,mode=0755 -t tmpfs tmpfs /dev ::sysinit:/bin/mkdir -p /dev/pts ::sysinit:/bin/mount -o mode=0620 -t devpts devpts /dev/pts ::sysinit:/bin/mount -t tmpfs tmpfs /tmp ::sysinit:/bin/mount -t tmpfs tmpfs /var ::sysinit:/bin/echo /sbin/mdev > /proc/sys/kernel/hotplug ::sysinit:/sbin/mdev -s #::sysinit:/bin/hostname -F /etc/hostname # lo networking #::sysinit:/sbin/ifconfig lo 127.0.0.1 up #::sysinit:/sbin/route add -net 127.0.0.0 netmask 255.0.0.0 lo # Logging junk ::sysinit:/sbin/syslogd -C ::sysinit:/sbin/klogd # USB networking #::sysinit:/sbin/ifconfig usb0 10.1.0.2 netmask 255.255.255.252 up #::sysinit:/sbin/route add default gw 10.1.0.1 # Miscellaneous daemons #::sysinit:/usr/sbin/inetd #::sysinit:/usr/sbin/udhcpd /etc/udhcpd.conf # Run rc script #::sysinit:/etc/init.d/rcS #Mount appfs #::sysinit:/bin/mount /dev/mmcblk0p2 /usr/mtdblock3 -t ext3 -o ro #::sysinit:/bin/mount /dev/mmcblk0p3 /usr/mtdblock4 -t ext3 -o rw #::sysinit:/bin/mount /dev/mmcblk0p4 /mnt/memory -t vfat -o rw,utf8 ::sysinit:/bin/mknod /dev/tcsm c 238 73 #::sysinit:/bin/cp /boot/local/dmenu/dmenu_ln /tmp/dmenu_ln #wifi config,now no use #::sysinit:/bin/mkdir -p /var/run/wpa_supplicant #::sysinit:/bin/mkdir -p /var/state/dhcp #::sysinit:/bin/touch /var/state/dhcp/dhclient.lease #::sysinit:/bin/touch /var/state/dhcp/dhcpd.leases # Launch the main application #tty1::respawn:/etc/main tty1::respawn:/bin/sh # Put a getty on the serial port ttyS1::respawn:/sbin/getty -L ttyS1 57600 vt100 # Stuff to do for the 3-finger salute ::ctrlaltdel:/sbin/reboot # Stuff to do before rebooting null::shutdown:/usr/bin/killall klogd null::shutdown:/usr/bin/killall syslogd null::shutdown:/bin/umount -a -r null::shutdown:/sbin/swapoff -a