...also some new Boards:

Hello, can't find any info about this board... Any idea about jumpers? For example where is turbo connector? External battery?

Suntac V2.06 (or V2.08) (wrote on board) Protek (wrote on board) BIOS 3.03HL "LOGO STAR" (shown under BIOS version line) AMD N80L286-10/S 1MB memory DIP switch (looks the same as on other Suntac boards)
ST62C005-B ST62BC00I-B ? ST62BC001-B ? ST62BC002-B ST62BC004-BI ST62BC003-B

This looks like the board I had. Mine also did not came with docs. If I recall correctly, it uses the same dip switch settings as other suntac boards.

HanJammer wrote on 2019-06-25, 13:41:

My collection of Suntac motherboards... all working perfectly fine. […]
Show full quote

My collection of Suntac motherboards... all working perfectly fine.

suntac1.jpg

suntac2.jpg

suntac3.jpg

suntac4.jpg

suntac5.jpg

Hi : )

I have got a board with pretty much the same layout as yours but there is no DIP Switch, making it hard to right config the 4 sipp (1mb each) I am trying to install. There is a space designed to be a DIP but it is empty. The supposed sw1 and sw2 have both a jumper each, the rest are empty.

The board POST appears to be normal with 1mb onboard.

I am planning to remove the 2 jumpers and add a switcher or just add more jumpers, but the question is which of the 3 contacts do I have to short?

zecahue wrote on 2023-04-21, 19:57:

Hi : ) […]
Show full quote

HanJammer wrote on 2019-06-25, 13:41:

My collection of Suntac motherboards... all working perfectly fine. […]
Show full quote

My collection of Suntac motherboards... all working perfectly fine.

suntac1.jpg

suntac2.jpg

suntac3.jpg

suntac4.jpg

suntac5.jpg

Hi : )

I have got a board with pretty much the same layout as yours but there is no DIP Switch, making it hard to right config the 4 sipp (1mb each) I am trying to install. There is a space designed to be a DIP but it is empty. The supposed sw1 and sw2 have both a jumper each, the rest are empty.

The board POST appears to be normal with 1mb onboard.

I am planning to remove the 2 jumpers and add a switcher or just add more jumpers, but the question is which of the 3 contacts do I have to short?

Looking at the pictures (Re: Suntac 80286 Mainboards), board 2, 3, 4 & 5 all seem to be the same board. One of them has SIPP memory, the ohers DIPP. However, the switches that correspond with the two jumpers you have on your board seem to be same for all boards.

I guess you can try to jumper the two headers and see what happens?

Edit: this is the board from that post with the SIPPs installed (for anyone else who cares to take a look); download/file.php?id=65078&mode=view

zecahue wrote on 2023-04-21, 19:57:

Hi : ) […]
Show full quote

HanJammer wrote on 2019-06-25, 13:41:

My collection of Suntac motherboards... all working perfectly fine. […]
Show full quote

My collection of Suntac motherboards... all working perfectly fine.

suntac1.jpg

suntac2.jpg

suntac3.jpg

suntac4.jpg

suntac5.jpg

Hi : )

I have got a board with pretty much the same layout as yours but there is no DIP Switch, making it hard to right config the 4 sipp (1mb each) I am trying to install. There is a space designed to be a DIP but it is empty. The supposed sw1 and sw2 have both a jumper each, the rest are empty.

The board POST appears to be normal with 1mb onboard.

I am planning to remove the 2 jumpers and add a switcher or just add more jumpers, but the question is which of the 3 contacts do I have to short?

I found even more of these Suntacs since the post with the pics above. All of them have these DIP switches. They are used to configure memory size but they show different behaviour on some of these boards. I would say - if your board works fine and detects all of 4 or 5 MB of installed memory (because some will support max of 1 in DIP chips or 4 in SIPP modules and some apparently can support both types at once, although I never tried to configure them like this) - leave it alone, there would be no advantage in installing more jumpers or dip switches.

Update... Well i have a pile (>10) of these suntac boards. All of them are dead. seems like the chipset and board were just not up to the Test of time. Shame as they could have been a nice board but are now a source of BIOS chips and RAM. They are a mix of DIP and SIP, Jumpers and switches.