There you go 😀 http://www.elhvb.com/mobokive/Archive/Gigabyt … 586s/index.html

Many Thanks.
With the help of your link I've had been able to confirm that the board runs already with the latest bios 1.20.

Now I've just have to find out what the most potent CPU for this board is and how to jumper it 😉
https://www.gigabyte.com/microsite/121/tech_mmxtable.htm

Well, same site, different place 😀
http://www.elhvb.com/mobokive/Archive/Gigabyt … 586s/index.html

TNX again, I've got that manual already but it leaves me still with the questions risen.

Following that link https://www.gigabyte.com/microsite/121/tech_mmxtable.htm the board supports e.g.

• Intel Pentium®MMX 266
• AMD® K6™ 233
• Cyrix®IBM® 6x86 MX™ 233

... none of this CPUs is listed in the manual and I'm a bit at a loss.
But without going deeper into the matter, any hint how to set jumpers for e.g. the P 266 (4x 66MHz)?

The manual even says that the board should support 75MHz FSB but there is also no info how to set jumpers ...

PS: all I've found so far is another post with the very same question:
https://www.experts-exchange.com/questions/10 … -586S-Mobo.html

Pentium 266 ? Now that's weird because that CPU doesn't exist for desktop PCs

JP8 seem to be the jumper that controls the multiplicator.
So OFF = 1.5x,
1-2 = 2.0x
1-2, 3-4 = 2.5x,
3-4 = 3.0x
Meanwhile JP4,3,2 and 10 control the FSB :
ON OFF ON 2-3,5-6 = 50MHz FSB,
ON ON OFF 2-3,4-5 = 60MHz FSB,
OFF ON OFF 1-2,5-6 = 66MHz FSB.

Now, on Pentium MMX, the 1.5x multiplicator is rewired as 3.5x so you can run a PMMX 233 with no problem. For more multiplicators, I think having a photo of JP8's area would be interesting ^^

It's always a bit of a Sudoku game with the jumper settings for this old boards.
There is a (mobile) Pentium 266 but alternativly I've got a AMD K6-266/AFR at hand which should run with the same multiplier.

Well send us a picture of the area around JP8 in case there are undocumented settings possible ! 😀

Hi! I'm using a GA-586s, too, in my Pentium PC that I use for testing..
https://www.youtube.com/watch?v=irtDxYman88

So far, the WimsBIOS with 32GB HDD patch served me well.

https://www.wimsbios.com/large-hdd-patched-bios.jsp
http://wims.rainbow-software.org/

ildonaldo wrote on 2020-06-11, 12:52:

The manual even says that the board should support 75MHz FSB but there is also no info how to set jumpers ...

2020-06-11 15_19_01-586S - 586s.pdf.jpg

I tried to use 75 MHz FSB on this board and came to the conclusion that it might not be possible. According to the manual, the only supported CPU with 75 MHz FSB is the Cyrix P200+, and in the jumper settings section, there is a note:

(1) Please feel free to contact sales representative for special order to use Cyrix CPU 200 MHz.
(2) Not full line of this products can support Cyrix CPU 200 MHz
JP11 1-2 Normal.
JP11 2-3 Cyrix 6x86-150 MHz-P200+

So it does not normally support the Cyrix 200 that needs FSB 75, only special versions of the board do. And jumper JP11 needs to be set. Jumper JP11 seems to correspond to the FSEL2 pin on the clock generator chip that is needed to enable FSB 75: https://datasheetspdf.com/datasheet/PLL52C59-14A.html. The exact model on my board is a little different (PLL52C59-14LSC), but it is the same number of pins and the jumpers on the mainboard lead to the same FSEL pins. The problem is that the JP11 header is missing on my mainboard, and the FSEL2 pin leads to nowhere. According to other photos I found online, this seems to be common.