VOGONS

Search

Common searches

Help identifing this 80286 mainboard

Topic actions

First post, by Scottmm

Posted on 
User metadata
Rank Newbie
Rank
Newbie

I have a 286 board I need help(the jumper settings with). G2-102 Headland very similar to the Motherboard: LM-103S http://minuszerodegrees.net/at_clone_bios/at_clone_bios.htm

Board originally had 1025KB Onboard RAM via DIPs and 2 banks of 30 pin rows soldered over. I removed the solder from the board and installed sockets then took some 256KB and 1MB SIMMs and turned them into SIPPs. The board was only seeing one set of ram so after removing the DIPs and installing the 256KB SIPPs in bank 0 I got 512KB good but with the 2 1MB in bank 0 I got also only got 512KB, some random jumpering and switch flipping I found that DSW1 sw2 to on allowed my memory to be fully detected.

Does anyone have know where to find a copy of the manual or at least a Jumper diagram.

Board also has a odd issue where the Keyboard will not respond till after the bios pops up with a cmos error at boot (can't skip memory count and with 2MB its a long count)

Attachments

Reply 2 of 7, by Scottmm

Posted on 
User metadata
Rank Newbie
Rank
Newbie
snufkin wrote on 2022-01-10, 17:09:

Similar layout and jumper locations as this one maybe: https://www.ultimateretro.net/en/motherboards/5169#downloads

Perfect other then bank numbering that looks just like it and the jumpers seem to be working as shown.

THANK YOU

Reply 3 of 7, by Deksor

Posted on 
User metadata
Rank l33t
Rank
l33t

Could you please run this from DOS to dump your bios ? http://cd.textfiles.com/microhaus/mhblackbox3 … MORY/GETROM.ZIP
(Or dump the roms directly with an eprom reader if you have one), that way I can add it to the page ? It would probably help find out who made this board as well 😀

Trying to identify old hardware ? Visit The retro web - Project's thread The Retro Web project - a stason.org/TH99 alternative

Reply 4 of 7, by snufkin

Posted on 
User metadata
Rank Oldbie
Rank
Oldbie

Also, any idea where your JP1 header goes, or what it does? It's not mentioned in the MicroHouse sheet, and on the LM-103S it's fitted with a 3 pin header.

Just found a Vogons link on Toms Hardware about this: https://forums.tomshardware.com/threads/what- … s-this.3276139/ which links to a Vogons thread: 286 build! Deskframe 286-12, Paradise VGA, SB-PRO

Speculating, but maybe the 102 version was slightly cut back with the 25MHz crystal and you said the SIPP socket PCB holes were filled. Then the 103 version has the 32MHz crystal and SIPP sockets fitted.

Also, mind that there's what looks like a bit of corrosion between slot 4 and 5, near R16, possibly from something previously in slot 5.

Reply 5 of 7, by Deksor

Posted on 
User metadata
Rank l33t
Rank
l33t

Looking at slot 5, the pins seem to be bent in a weird way, I wonder what happened there

Trying to identify old hardware ? Visit The retro web - Project's thread The Retro Web project - a stason.org/TH99 alternative

Reply 6 of 7, by Scottmm

Posted on 
User metadata
Rank Newbie
Rank
Newbie
Deksor wrote on 2022-01-10, 22:34:

Could you please run this from DOS to dump your bios ? http://cd.textfiles.com/microhaus/mhblackbox3 … MORY/GETROM.ZIP
(Or dump the roms directly with an eprom reader if you have one), that way I can add it to the page ? It would probably help find out who made this board as well 😀

Rom Dump

Attachments

Reply 7 of 7, by Deksor

Posted on 
User metadata
Rank l33t
Rank
l33t

Thank you !

So apparently this is an Aquarius motherboard. I'll update the ultimateretro page 😀

Edit : done

Trying to identify old hardware ? Visit The retro web - Project's thread The Retro Web project - a stason.org/TH99 alternative

Go to top of page Go to top of page
Back to General Old Hardware
Close window
Close window