Could be one of these (178 matches):
https://www.ultimateretro.net/motherboards/?s … 5D%5Bcount%5D=8

For one you cannot boot a 486 with one 30pin SIMM, it needs four matched SIMMS preferably 9 chip 1MB each but 3 chip 1MB should work. In SIMM1 thru 4.
66Mhz crystal usually means a 33Mhz or DX2-66 486.
The ALI m1419 chipset can help narrow it down but need a ROM dump to see the AMI bios string.

Here's a smaller list where your motherboard might be : https://www.ultimateretro.net/en/motherboards … 5D%5Bcount%5D=7

It's the same as mr_slug's except only boards without any vlb slot are listed.

As said previously, it can't post with just one 30pin simm, you need 4 of them at least. Once you get it running, please dump the bios (if you need help for that, tell us) so we can perhaps identify it better.

HI,
Thanks for your help 😀

I have allready tried with 4 sticks of ram 😀, I just took the picture before i had put all the ram sticks in - my fault, sorry.
I will try with some other ram sticks. I have got some 3 Chip 1MB that i know is working in another machine.
If it does not work, I will borrow some 9 Chip ram sticks from a friend.

Best Regards
Carsten

I'm not sure if the post codes you're getting mean much, but here's a list of possible meaning of the post codes : http://www.bioscentral.com/postcodes/amibios.htm

Maybe it's "0D" of AMI color ? That means "8042 keyboard controller tested, CMOS".

Then code "00" means "Control to Int 19 boor loader" meaning that the computer is actually trying to boot 😮

You could connect a floppy drive to your computer to see if it seeks. Some bios default with a floppy drive so if it's one of those, it will try to seek the disk.

Is your video card known to work ?

You could also try another ISA slot for the video card.

Hi Deksor,

Thanks for the help, It is alive 😀 😀

I got a bit confused over the post codes, because it looks like the board was working !!.

I changed the ram sticks to 1MB 3 chip, I had to try some different ones, before i could get it to work...the board is pretty senitive about the ram
I still use the Amd 40 mhz cpu, it just running @ 33 Mhz, also used another ISA slot for the video card.
Installed a controller card and CF-adaptor, and the machine boots on the CF card 😀, It got the hdd specs for the CF card from the Sandisk manual

I have used HWinfo, but I get no information about the board, it says "unknown model"

I need some help for the ROM dump, i have not tried it before...

Best Regards
Carsten

It's made by Lucky Star, possibly named 486DXA. There is no info about it on the internet it seems.

Just 47 boards with 7 ISA 16bit slots for 486 and nothing else:

http://www.win3x.org/uh19/motherboards/?showI … 5D%5Bcount%5D=7

Not that it matters much, there is still no match for your board. I'll see what I can dig up, if anything.

To dump the bios, use this link : http://cd.textfiles.com/microhaus/mhblackbox3 … MORY/GETROM.ZIP

Run ATROM.exe and send the file it will generate in a zip here. Be aware that it can only dump bioses that are 64KB or less (which is fine for this kind of board).

evasive wrote on 2021-10-07, 16:27:

Just 47 boards with 7 ISA 16bit slots for 486 and nothing else...

Ah 7:-)

yes 7 16bit ISA slots 😀

I have unpacked the zipfile to a floppy, but the ATROM.EXE is not there, so I used the ROMSAVAT.exe instead -
It has generated a file called ATROM, I have uploaded it as a zipfile - hope it can help you 😀

Thanks for the help.

Regards
Carsten

Yes my mistake (I rarely use it because I have an EPROM reader), thank you very much !

We can now try to document your board as best as we can on uh19

😀, nice to have an eprom reader.

You are welcome, glad that I could be able to assist you.

Regards
Carsten

http://www.win3x.org/uh19/motherboards/9715

Thanks 😀

I have seen it, but something caught my eye.....it says it supports 386 Cpu´s...

Regards
Carsten

Whoopsie, I fixed that 😁

Perfect 😀)