My first Roland ) Filename 20201223_234621.jpg File size 1.59 MiB Views 1663 views

So, I have found a little bit difference between my and McBierle's motherboard. (Thanks for the first photo ;) ) It's two resistors (R44, R45). They are placed vice versa. On my board R44 - 432 Ohm, R45 - 249 Ohm. As far as I understand they are used for adjust voltage regulator. resistors.jpg I …

Bancho wrote on 2020-06-22, 18:53: Ph@nt0m-X wrote on 2020-06-22, 17:56: I did retrobright on my 486 PC. before.jpg after.jpg Great Job! That turned out awesome. What Method did you use? I used oxidizing emulsion cream for hair vol.40 (contains 12% hydrogen peroxide), stretch wrap and the sun light …

So i had finally time to do some soldering. And it works somewhat: WP_20181021_005.jpg First test, correct voltage. Put in an Am486DX4-100, it boots fine. But it is recognized as a DX2 at 100Mhz. WP_20181021_006.jpg WP_20181021_007.jpg Could it be that the bios has to be updated? I'll try an intel …

I did retrobright on my 486 PC. Filename before.jpg File size 1.47 MiB Views 933 views Filename after.jpg File size 1.73 MiB Views 933 views

#62 Manufacture: Soyo 025K2 Chipset: SiS 85C471 BIOS: Rev G2 - 09/26/94 Filename sy-25k2.jpg File size 1.12 MiB Views 3266 views Filename sy-25k2.zip File size 44.35 KiB Downloads 117 downloads

Hi all. I have got the same version of BIOS image (rev. G2 BIOS from 09/26/94) for this MB and compared both of them. And it looks like they differ. They have different bytes from 0x0000F029 to 0x0000F038 and 0x0000FFEE (I assume it's checksum). Does anybody know something about that?

digistorm wrote on 2020-03-15, 21:15: Hi, I saved my BIOS file with the latest version of that program. I hope it is useful to you. Thanks a lot!

Thread where you can find all sorts of informations about this family of boards, including some BIOSes. Thanks And this link to archive.org lists 486, 586 and 686 bios and they are downloadable. https://web.archive.org/web/19970112032308/http://www.soyo.com.tw/bios.htm Thanks for link, I have …

Hello guys! I have got Soyo 025K2 motherboard for my 486 retro PC, but it has old version of BIOS (Rev. B2), I know that the last version is Rev. G2 from 09/26/94. I can't find any BIOS for this motherboard. Guys, if you have same model, could you please share your BIOS? Also, if you have 025L2, …