NEO N42C-4 BIOS [20180725] is available to download from below:
Download Link 1 [MINIX Forum Server]:
https://files.theminixforum.com/shared/bios/N42C-4_BIOS-20180725.zip
Download Link 1 [MINIX Forum Server]:
https://files.theminixforum.com/shared/bios/N42C-4_BIOS-20180725.zip