VOGONS


First post, by Baoran

User metadata
Rank l33t
Rank
l33t

I found untested 486 motherboard for sale. Do you recognize what model motherboard this is?
Also I would appreciate if you would give me some advice how much it would be worth paying for.

faad3f4637265da786e4a75cc1a31-orig.jpg
Filename
faad3f4637265da786e4a75cc1a31-orig.jpg
File size
338.19 KiB
Views
1028 views
File license
Fair use/fair dealing exception
d63c801fb8a07294f99e44b4287a5-orig.jpg
Filename
d63c801fb8a07294f99e44b4287a5-orig.jpg
File size
209.78 KiB
Views
1028 views
File license
Fair use/fair dealing exception
56886d990d012bb0ab4458d1ccae6-orig.jpg
Filename
56886d990d012bb0ab4458d1ccae6-orig.jpg
File size
238.89 KiB
Views
1028 views
File license
Fair use/fair dealing exception
5ab3367d3a7a6926fc1e71023b359-orig.jpg
Filename
5ab3367d3a7a6926fc1e71023b359-orig.jpg
File size
367.87 KiB
Views
1028 views
File license
Fair use/fair dealing exception
1b6ad3751414657835daeb9f961cc-orig.jpg
Filename
1b6ad3751414657835daeb9f961cc-orig.jpg
File size
268.53 KiB
Views
1028 views
File license
Fair use/fair dealing exception

Reply 1 of 16, by Skyscraper

User metadata
Rank l33t
Rank
l33t

Perhpas CHAINTECH 486SLB ?

New PC: i9 12900K @5GHz all cores @1.2v. MSI PRO Z690-A. 32GB DDR4 3600 CL14. 3070Ti.
Old PC: Dual Xeon X5690@4.6GHz, EVGA SR-2, 48GB DDR3R@2000MHz, Intel X25-M. GTX 980ti.
Older PC: K6-3+ 400@600MHz, PC-Chips M577, 256MB SDRAM, AWE64, Voodoo Banshee.

Reply 2 of 16, by Baoran

User metadata
Rank l33t
Rank
l33t

This is the only picture of chaintech 486SLB I was able to find online and it looks different.

http://pcrebuilding.altervista.org/images/res … fa_p1140336.jpg

Reply 3 of 16, by jheronimus

User metadata
Rank Oldbie
Rank
Oldbie

It's a Chaintech 486SLB, but their part numbers don't seem to mean a whole lot. I've written about a 486SLP, a slightly more advanced model here. Yours is based on the same chipset and socket, doesn't support 3.45v CPUs (no VRM installed), only has two 72-pin RAM slots and can likely use a lot of cache RAM. It is probably identical to 4SLB, so you take a look at settings here .

Long story short: if this board is anything like mine, it should probably be OK for those who have at least some experience with 486 boards, but it's definitely not a great choice for beginners. It really gave me a lot of issues. Personally, I would look for something easily identifiable and with better documentation.

Reply 5 of 16, by Predator99

User metadata
Rank Oldbie
Rank
Oldbie

I think the price is OK. I see some green residues inside the keyboard connector, but other areas does not seem to be corroded. If its not running you still have some spare parts ,-)

Reply 7 of 16, by Baoran

User metadata
Rank l33t
Rank
l33t

It probably has not been stored in a very good place considering how corroded that one screw is that is still in one of the holes of the motherboard.
I suppose the main question is if it is still worth trying to rescue. I don't know if it is considered a good 486 motherboard or if it just a motherboard which are common and easy to find in better condition.

Reply 8 of 16, by Predator99

User metadata
Rank Oldbie
Rank
Oldbie

Buy it...try to get a better price mentioning the corrsoion on screw and keyboard. If the board is not running you get a not very common CPU (never seen it actually?), Cache, Ram, Keyboard controller and Bios...

Jumper settings are described on the board, this is not an issue. You will not get much more info from a manual.

Reply 9 of 16, by Baoran

User metadata
Rank l33t
Rank
l33t

I offered him $12 + $8 while expecting him not to accept and it was a big surprise that the seller accepted the offer. I hope it isn't a bad sign that the motherboard is even worse than it looks.
Edit: I have to admit that cpu looks strange.

Reply 11 of 16, by kixs

User metadata
Rank l33t
Rank
l33t

I don't find the CPU anything special. It's renamed Cyrix 486, runs at 5V and is about 5% slower then AMD or Intel on the same clock. Although it is a bit rare one.

Too bad the underside of the board isn't shown. But usually these work in about 85% of the time. Just make sure the memory is correct type (FPM) and in correct slot if it won't boot.

My Amibay | - Updated on 2021-12-01 | Requests also possible

Reply 12 of 16, by Baoran

User metadata
Rank l33t
Rank
l33t

Can you use different 486 cpu on this motherboard that uses different FSB speed? I would actually want to replace the cpu with 33Mhz intel one if the motherboard works.

Reply 14 of 16, by Baoran

User metadata
Rank l33t
Rank
l33t
c0keb0ttle wrote:

I think it looks like a Mylix MGI486.

http://th99.classic-computing.de/src/m/M-O/32502.htm

It is close except that boards seems bit bigger and some of the jumpers are missing from my pictures.

Reply 15 of 16, by Baoran

User metadata
Rank l33t
Rank
l33t

I just received the motherboard and took another picture of it.

IMG_1181.JPG
Filename
IMG_1181.JPG
File size
4.6 MiB
Views
726 views
File license
Fair use/fair dealing exception

It has some bent pins, but I have not found any that seem broken yet. The keyboard connector is bit corroded and I think the memory module is 4Mb. Battery is dead but doesn't seem like it has leaked much. The motherboard has alot of jumpers. I wonder if there is some kind of manual for those online somewhere.