Gemini PDA 4G >> Android
Flash Kernel Image(TWRP)
參考資訊：
1. KernelCompilation
2. gemini-android-kernel-3.18
由於Android Kernel的ramdisk檔案無法相容於Gemini PDA(Debain)，因此，最快的方式就是提取Android系統既有的檔案，過程說明如下。
1. TWRP Backup boot partition(boot.emmc.win)
2. 編譯Kernel取得Image.gz-dtb
$ cd $ git clone https://github.com/osm0sis/mkbootimg.git $ cd mkbootimg $ make $ sudo cp mkbootimg /usr/bin/ $ sudo cp unpackbootimg /usr/bin/ $ cd $ mkdir unpack $ cd unpack $ unpackbootimg -i xxx/boot.emmc.win Android magic found at: 0 BOARD_KERNEL_CMDLINE bootopt=64S3,32N2,64N2 buildvariant=user BOARD_KERNEL_BASE 00000000 BOARD_RAMDISK_OFFSET 04f80000 BOARD_SECOND_OFFSET 00e80000 BOARD_TAGS_OFFSET 03f80000 BOARD_PAGE_SIZE 2048 BOARD_SECOND_SIZE 0 BOARD_DT_SIZE 0 $ ls boot.emmc.win-base boot.emmc.win-name boot.emmc.win-ramdisk.gz boot.emmc.win-tags_offset boot.emmc.win-cmdline boot.emmc.win-os_patch_level boot.emmc.win-ramdisk_offset boot.emmc.win-zImage boot.emmc.win-dt boot.emmc.win-os_version boot.emmc.win-second boot.emmc.win-zImage.fdt boot.emmc.win-kernel_offset boot.emmc.win-pagesize boot.emmc.win-second_offset boot.emmc.win-zImage.gunzip $ mkbootimg --kernel xxx/Image.gz-dtb --ramdisk boot.emmc.win-ramdisk.gz --base 0x40080000 --second_offset 0x00e80000 --cmdline "bootopt=64S3,32N2,64N2 log_buf_len=4M" --kernel_offset 0x00000000 --ramdisk_offset 0x04f80000 --tags_offset 0x03f80000 --pagesize 2048 -o linux_boot.img $ git clone https://github.com/steward-fu/gemini_twrp_flashable_kernel $ cp linux_boot.img gemini_twrp_flashable_kernel/boot.img $ cd gemini_twrp_flashable_kernel $ zip -r ../gemini_twrp_kernel.zip *
3. 接著開機進入TWRP(開機按住側邊銀色按鍵)並刷入gemini_twrp_kernel.zip
