1. I am unable to boot it using different types of memory modules due to no video. There is no video chipset on this, used WD 90C31 ISA for video. Even tried to juice the CMOS battery externally.
2. I did limited attempts using existing jumpers combinations but did not attempt other jumper pins that are empty.
3. The type of bios firmware is unknown as this flash bios is AMD AM28F010 which is 128K x 8bit flash chip. Micro Industries always used paper labels.

The card's part number is: 9700613-0000C, 486HS PC104 S/N0975, manufacture date is estimated to be 1998 or so.
Main CPU is Am486DX2 66 by AMD even tried standard Intel 486DX 33 instead.
Nonstandard cache module designed by Micro Industries, dual tag using tag IDT 71256SA12Y 32K x 8 and other tag is CY7C64-15VC 16K x 4, Also eight IDT 71256SA12Y 32K of 8 chips
Main chipsets are Chips & Technologies, aka C&T (CHIPS) consists of two chipsets:
F84021 and F84025 both unknown online, no information about these two.

Super I/O chip is by C&T 37C735 which is available online for this datasheet.
Intel N8242PC PLCC package for keyboard/mouse support.
Clock generator: Avasem AV9155-01CW20

Motherboard archives does not have these chipsets anywhere so no idea about finding compatible bios firmware.
Of this high quality, Micro Industries used 6 or 8 layer PCB means these jumpers are connected to buried tracks so also not able to determine rest of jumpers are for also much harder due to no information on these two chipsets.

Photos:

Cheers,