Getting into the extended bootloader, Moxa Linux (Debian 9), UC81xx etc., booting from SD Card

Tested the UC-8112-LX with HW rev 3.0.0 and installed firmware v3.1 and there is an option in bootloader to bootup from eMMC or from SD card.

Instructions:

1. Connect over console cable your laptop and UC-8112-LX.
2. Keep pressed * key while UC-8112-LX powers-on to enter into full menu of boot loader.
3. Choose option under h) Run kernel and then decide where to boot-up from eMMC (0) or from SD card (1).

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Model: UC-8112-LX
Boot Loader Version: 1.0.0S09 CPU TYPE: 1000MHz
Build date: Jun 19 2018 - 19:42:27 Serial Number: TAIDB1044152
LAN1 MAC: 00:90:E8:7A:A3:1F LAN2 MAC: 00:90:E8:7A:A3:20
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(0) Set/Clear Flag                (1) Download/Upload
(2) Set SN/MAC                   (3) Set Burn in Time
(4) TFTP Settings                (5) Console/UART Test
(6) Ethernet Test                  (7) IO Test
(8) Memory/Storage Test     (9) TPM2 Setting
(a) RTC Test                         (b) USB Host Test
(c) SD Test                            (d) LED Test
(e) WDT Test                         (f) Set/Clear backup env
(g) QA Test                            (h) Run Kernel
(q) UBoot Command Line
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Command>>h

----------------------------------------------------------------------------
Model: UC-8112-LX
Boot Loader Version: 1.0.0S09 CPU TYPE: 1000MHz
Build date: Jun 19 2018 - 19:42:27 Serial Number: TAIDB1044152
LAN1 MAC: 00:90:E8:7A:A3:1F LAN2 MAC: 00:90:E8:7A:A3:20
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(0) Run Kernel from eMMC       (1) Run Kernel from SD
(2) Run Kernel Normal Release
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Command>>