好久以前的机器了，只有512M内存，简直是闲，花了一天的时间刷成了cm12（cm14内存占用略大），主是参考xda大神的帖子（附在文末）
本文搬自xda，文末附有原帖地址，以及部分文件。
本人原先刷过twrp for otter，以及cm11，在此基础上刷的cm14.
1、直接mout sd卡，用电脑将bootloder文件转入手机，然后install OtterX Bootloader，文件百度地址otterx-u-boot_v2.05.zip
2、同理刷入twrp for otterx
3、Reboot after installing TWRP for OtterX
Open the bootloader menu by pressing [POWER]
Use 1-2 SHORT presses of [POWER] to highlight "ADVANCED -->"
Use a LONG press of [POWER] to select ADVANCED MENU
Use 5 SHORT presses of [POWER] to highlight "PARTITION MODE: AMAZON" (if this is OTTERX you can skip step 3)
LONG press [POWER] to open "PARTITION MODE MENU"
Use 4 SHORT presses of [POWER] to highlight "[CONFIRM] SET MODE: OTTERX"
WARNING THIS WILL ERASE THE CONTENTS OF YOUR "SDCARD" and USERDATA!!!! Before doing this step you should have backed up ANYTHING IMPORTANT and pulled it off of your Kindle!
LONG press will select this option and your system, cache, userdata will be changed to the OtterX layout (and ERASED)
Now use short [POWER] presses to navigate BACK and then to "RECOVERY"
4、此时可以通过ADB push命令，将刷机包移入平板
adb push
/sdcard/
adb push gapps-kk-20140105-signed.zip /sdcard/gapps-kk-20140105-signed.zip
5、如需谷歌服务，可以此时刷入gapps zip包（不刷入gapps，可能卡在欢迎界面，需要删除system/pri-app/cmsetupwaized文件夹（需先mount system））
6、重启，出现开机画面，需要等待5分钟左右进入系统。
4、5、6步骤可以刷入各个版本的刷机包。
机子还是太老了，运存太小了，爱折腾的权当弄得玩吧，可以体验一下，cm的各种版本（基于安卓5、6、7）
PS：百度盘部分文件链接：复制这段内容后打开百度网盘手机App，操作更方便哦 链接:https://pan.baidu.com/s/1i0A0S3p2OYIFVqcPea1LFg 提取码:zreh
PS：原帖地址
刷机步骤：https://forum.xda-developers.com/showthread.php?t=2671619
转换成otter x分区：https://forum.xda-developers.com/kindle-fire/development/rom-kernel-unofficial-cm12-0-otterx-t2958155
https://forum.xda-developers.com/kindle-fire/general/guide-1st-gen-kindle-drivers-rooting-t3008345
各种cm包以及twrp：https://www.androidfilehost.com/?w=files&flid=24725
https://forum.xda-developers.com/showthread.php?t=1859851
gapps：http://d-h.st/users/dhacker29/?fld_id=27426#files