x555 hardware note

doc/HARDWARE.md

@@ -1,4 +1,46 @@
 # Hardware
+
+## X-555
+```
+root@ngx:/ # free
+             total         used         free       shared      buffers
+Mem:        940860       768020       172840            0         4440
+-/+ buffers:             763580       177280
+Swap:       524284        48272       476012
+
+root@ngx:/ # cat /proc/cpuinfo
+Processor	: AArch64 Processor rev 0 (aarch64)
+processor	: 0
+processor	: 1
+processor	: 2
+processor	: 3
+Features	: fp asimd evtstrm crc32
+CPU implementer	: 0x41
+CPU architecture: 8
+CPU variant	: 0x0
+CPU part	: 0xd03
+CPU revision	: 0
+
+Hardware	: Qualcomm Technologies, Inc APQ8016
+
+root@ngx:/ # df
+Filesystem               Size     Used     Free   Blksize
+/dev                   459.4M    52.0K   459.4M   4096
+/sys/fs/cgroup         459.4M    12.0K   459.4M   4096
+/mnt/asec              459.4M     0.0K   459.4M   4096
+/mnt/obb               459.4M     0.0K   459.4M   4096
+/system                  1.2G     1.1G    81.0M   4096
+/data                    4.8G   243.9M     4.6G   4096
+/cache                 248.0M   152.0K   247.8M   4096
+/persist                27.5M   168.0K    27.3M   4096
+/firmware               64.0M    19.0M    44.9M   16384
+/storage/extsdcard      14.4G    58.4M    14.4G   4096
+/mnt/media_rw/sdcard0    15.0G    11.2M    15.0G   8192
+/mnt/secure/asec        15.0G    11.2M    15.0G   8192
+/storage/sdcard0        15.0G    11.2M    15.0G   8192
+```
+
+## Z-903
 ```
 root@ngl:/ # free
              total         used         free       shared      buffers