And this could be handyfull url:
http://web.archive.org/web/20040730182944/htt … w.chaintech.de/

About 486 chaintech motherboards:

CHAINTECH 486 MAINBOARDS
BIOS Updates/Large capacity drives/Y2K Issue/Jumpersettings

BIOS UPDATES
There are only BIOS updates available for a few of the Chaintech 486 mainboards. To download the BIOS update for the boards that have one just click on the model name in the Chaintech 486 Mainboard Overview.

Even for the boards that do have an update available it is still not recommended to update the BIOS ! The BIOS updates only contain small bug fixes which will NOT address important issues such as large capacity harddrive support or Y2K compliance. The reason why we warn for updating is that the risk of an unsuccesful update process (ending up with a `dead` PC) is greater than the possible gains. Also, the number of different PCB versions of a particular board, some of which may not be able to use the latest BIOS update.

BIOS UPDATING PROCESS
If you do intend to update your BIOS anyway, make sure to use the v5.0 flash utility. Also, don`t forget to save your current BIOS in case the updating process fails. Should the BIOS update process fail and you are not able to reprogram the BIOS with the saved file, then it will be necessary to use an EPROM programmer to reprogram the BIOS. If you don`t have one yourself (most likely) please contact your dealer. If he also cannot help you, then contact one of our service centers nearest you. For the USA you can contact tech@chaintechusa.com, for Europe contact our German office at elt@chaintech.de and for other territories, please contact mail@ccmgate.chaintech.com.tw

ADDRESSING LARGE CAPACITY HARDDRIVES
One of the most frequently asked questions concerning 486 mainboards is the ability to address large capacity (>1GB) harddrives on these boards. Due to the limitations of the chipsets on these boards it is not possible to directly address these type of harddrives. It is necessary to use third party software such as OnTrack`s DiskManager (or similar) to address the total space of these harddrives. Due to the limitations of the 486 board`s chipsets it is also not possible to fully benefit from advanced features of these harddrives such as higher performance (PIO mode 4, Ultra DMA/33) and other Enhanced IDE`s benefits.

Y2K COMPLIANCE
None of the Chaintech 486 mainboard's BIOS updates is fully Y2K compliant. In order to address this issue, Chaintech provides a utility, the TSR2000, which should be installed just before the year change 1999-2000. After the yearchange has passed, you can remove this utility. For more information on this Y2K issue please refer to the Y2K section on this website.

JUMPERSETTINGS
Unfortunately, there are no text or PDF files available for the 486 mainboards. In order to make the jumpersettings of the 486 mainboards available for viewing through the internet, the jumpersettings were scanned into GIF files, which can be found in the below Chaintech 486 Mainboard Overview. Please note that the files have been maximally compressed in order to keep downloading times low. The quality of the scanned pictures has therefore been compromised without loosing its functionality. If you want us to fax or scan any particular part of the manual of your 486 board which is not available for downloading here, then please don`t hesitate to send us an e-mail.

Flash utility V5.0 -> http://web.archive.org/web/20001017000523/htt … SH/FLASH-50.EXE
Y2ksection with 2000TSR -> http://web.archive.org/web/20001017000523/htt … RODUCTI/Y2K.htm

IDE drivers -> http://web.archive.org/web/20040730182944/htt … w.chaintech.de/

OLD VIA CHIPSET SITE, CAN COME HANDY WHEN LOOKING FOR LAST IDE BUSMASTER DRIVER
http://web.archive.org/web/20000815210113/htt … ivers/index.htm

thanks for posting the links, will have a looksie for the 486SLE I got... though it seems to have everything silkscreened , as far as I could see in the 5mins I looked at it
edit: hm, nothing for the 486sle 🤣 🤣 🤣

There is only an jumper sheet for you motherboard, and no other bios for all 486 boards.. And Chaintechs FTP is down.. I think there was the most of the stuff.
This is what you are looking for: http://web.archive.org/web/20040613180806oe_/ … UAL/4sle200.GIF

For the Y2K problem, the TSR2000 could help.. I tried it with one of mine boards.. But didnt work for me.. Maybe i did something wrong. I hope that someone here can program bios code and could solve that Y2K problem when i could dump the bios..

thanks again!
I hope I can spend some time with it on Tuesday, I'll give a shot at the bios too 😉

Thanks for sharing! Having had no luck in finding jumper settings for Winbond controller cards, I appreciate the effort 😀

I found someone who documented the GoldStar Prime 2 controllers and that made my day 😀

That why i put every usable url i found about those chaintech motherboard in this topic.. I know they are very scarce. Mostly i found trought links through links on waybackmachine..
I try to preserve every information i find.. That also can came handy, when you need things to know.

I also `dumped` all black motherboard shunts i found.. I put colored coded on the board, because its very easier to setup the board.