Jumper settings for Datavan(?) 486 ISA board?

[bustrucket]

Hi all

I recently acquired this motherboard, and it's fully working, but I haven't had much luck finding any details on it. Specifically, I'd like to know how to change the jumpers for different CPUs if possible (eg: 486SX, DX2, etc). Bit of a long shot I suppose, but nothing ventured etc...

It is an AT socket 3 (80486) board with a socket for a 80487.
It has 8x 30-pin SIMM sockets, 6x 16-bit ISA slots & 1x 8-bit ISA slot.
It has an AMI BIOS string of: 40-0500-ZZ1612-00101111-070791-SOLUTION-F
A bit of investigation tells me that the manufacturer code (1612) is DataVan?
The "SOLUTION-F" may be related to the chipset, as there is a surface-mount chip marked "Solutions/88C4386C/4L08F1209/Japan 9226EA1"
There is another large surface mount chip marked "Siemens/SAB82C206N/S1930191"
The keyboard BIOS is a Jetkey v3.

There is a 6-pin "CPUSEL" (3x 2-pin) jumper next to the CPU socket. Currently all 3 jumpers are closed and this seems to be the setting for a 486DX 33Mhz, at least this is what the board is currently running with anyway...

There is another 3-pin jumper "MFPE" next to the CPU socket, currently pins 1&2 are selected.

There are various other jumpers, but most of them seem self-explanatory (colour/mono display, BIOS battery, turbo, cache size, etc.)

I'm not sure if I'm allowed to post imgur links yet, if these don't work then I guess not

[Imgur](http://i.imgur.com/O7ijvXW.jpg)

[Imgur](http://i.imgur.com/v28YpEO.jpg?1)

Anyway, that's about all the info I can think to include just now. Can anyone point me in the right direction here?

Thanks

David

[Karlsweldt]

As long as linked sites refer to a reference and not other "services", not a real issue.
Looks like a 1991 vintage mobo! The BIOS battery would be beside the keyboard socket, a 3.6 volt tab type. But a 3 volt coin cell type battery would work as well, if a socket can fit in the area.
A 16-bit I/O card would be needed for peripherals such as floppy/hard disk, serial/parallel ports. The BIOS page for hard drive type may show some choices. Finding a good HD for that board may not be easy. A larger capacity may work, if the primary partition is fixed within the BIOS limits.
One set of jumpers may set the FSB speed, another the cache amount. And yet another for mono/color video. Maybe another set for separate FPU processor.
Might be some info here.. http://arvutimuuseum.ee/th99/m/C-D/34206.htm
or here.. http://www.elhvb.com/

[evasive]

Found another here:
https://www.vogons.org/download/file.ph ... &mode=view

Alas no other info, less even than you have. Datavan still does exist but even archive.org is not giving any info on motherboards. You might try simply emailing them to try and get info.

http://www.datavan.com.tw

[evasive]

it appears to be a relabeled Asus
http://www.win3x.org/uh19/motherboard/show/809

[evasive]

Not that one as it has a 206 sitting in the side. This one:
https://www.ultimateretro.net/en/motherboards/9756

Rumours are it was used in a Commodore PC but that is still under investigation.