imi wrote on 2022-06-08, 21:48:

where are you from if I may ask? or rather where did you get that board... might also help to look for local brands

Netherlands and got it 'untested' from an online marketplace also in the Netherlands - could even be from Germany as the seller lived fairly close to the border.

I did specifically ask for more details on the board, so received some pictures which all looked in good shape (except for the oxidized crystal).
Decided I would take the guess as it came at a fair price (25 euros, ex shipping) and you don't see much 386 on offer or for prices I can't afford.
Part of the fun after all is getting it to work. Did not expect I would have so much trouble finding any information about the board.

The two memory banks next to eachother seems to me a unique feature as I haven't found other 386 boards that have this layout.

ding ding ding

Wang EXEC 3131
https://www.youtube.com/watch?v=0S1P1h5bOkc

imi wrote on 2022-06-09, 03:42:

ding ding ding

Wang EXEC 3131
https://www.youtube.com/watch?v=0S1P1h5bOkc

Nice find! The camera is retro itself (and sharp exhale through the nose after reading the video title)

it was already really late yesterday so only watching the video myself now, but yeah it seems the 8pin DIN is indeed the keyboard, idk if a normal AT keyboard will work, may be possible because the extra 2 pins seem to be for a speaker inside the keyboard as seen here: https://deskthority.net/viewtopic.php?t=7672
edit: nvm that keyboard there only has 5 pins, the speaker is connected internally, I'm tired 😁 so I'm still not sure about the 8 pins.

deciphering the dip switches from the video it seems to be correctly set to external VGA (second one up) 1 and 4 which are down in your picture seem to be some "security features" ? could try putting them up too, and maybe put 2 down and try the onboard VGA.

another thing is check how the ram is populated in the video, could try the same arrangement.

Clearly this board is worthy of an addition to the ultimate retro pages. @Deksor

edit: after the photo has been corrected to show the correct rom/kbc placement. 😀

oh 🤣, your ROM is in the wrong socket apparently, in the video the ROM with the System/VGA label is in the bottom socket.

ayup, your ROM and keyboard controller are swapped, they have the same VCC/GND pins, so may still work x3 ...hmm VDD on the keyboard socket controller might be an issue though :x

also there's an internal speaker in the video too, so there should be some speaker connector on the board itself... J14 seems to be the speaker connector according to the label

J5 is the battery connector, can clearly see some corrosion around that area, can determine the pinout with a multimeter

imi wrote on 2022-06-09, 03:42:

ding ding ding

Wang EXEC 3131
https://www.youtube.com/watch?v=0S1P1h5bOkc

Awesome find! Really amazed you got this, and someone actually uploaded a video of it! Seems like a fairly unique board!

I'll take a look and let you guys know once I completed the video findings!
Definitely will try the internal/external video dip switch!

Let there be light (from the screen of course)

Thank you, thank you, thank you!