pocopico,
Thanks so much rp-ext.
Something wrong in ext in DS920p and ds1621p.
The loader from tinycore cannot detect LAN card (e1000e, r8125 and so on).
I manually insert module and find proper lan module as follows.
DS920P e1000e geminilake
e1000e.ko , 276376byte from 4.4.180plus
r8125.ko, 204928byte from 4.4.180plus
DS1621P v1000
e1000e.ko , 283016byte from 4.4.180plus-denverton
r8125.ko, 206712byte from 4.4.180plus-denverton
and How can I add my dtc or dtb file for tinycore loader recognition??
ds920p.dts, ds1621p.dts