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How to setup Chaintech 4SLD5 for raw AMD 5x86 p75 133

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First post, by Robin4

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Hello dear vintage computer users,

I have two chaintech SLD / SLP motherboards here.. One have an Voltage regulator onboard, so it would also support 3,3 volt cpu..
The other one doesnt, but i have plans to mount one on that other board too, just only wait when i have a good desolder station..

I had already played with that board, but actually i cant go further then the tested 100mhz cpus..Maybe 120mhz will also do..
But got some problems when setting up the board.. I red on a website, when the board supports DX4 processors, it also will do the raw AMD 5x86 - p75-133mhz cpu.
But maybe i dont known this board well.. I like to know which settings i do have to configure those motherboards..

Its seems it can handle:

80486DX4 as this manual says: http://museum.ttrk.ee/th99/m/C-D/33003.htm (cant find more then anything more like DX2, P24S or P24D or pentium overdrive on the sheet on the PCB from those motherboards)
I really like to know which settings i need to set those motherboards..

~ At least it can do black and white~

Reply 1 of 1, by Robin4

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Few seconds ago i have put an raw AMD 5x86 - P75 133 mhz in mine chaintech SLD/ SLP motherboard..

I have set it up like the AMD enhanced DX4 100 VSB8 processor with these settings:

The boards uses the IMI SC466 chip to configure the system bus speed.. JP11 = `closed` , JP12= `open`, JP13= `closed` = set the system bus speed to 33Mhz.

JP1- JP3 needs to be `open` (voltage setting)
JP6 (also for the voltage setting) need to be on the left side `1-2`
JP20 = 2-3
JP21 = 1-2
JP9 and JP10 = 1-2
JP16= 1-2
JP15 = `open` also i tried the 2x multiplier for DX4 processors, and the Cyrix setting, when using 3x muliplier it sees as an 100Mhz enhanced processor, with set it to 2x muliplier the processor will do 120 mhz..
JP25 =2-3

And RP7 and RP10 are shorted..

What i also really like to know.. This board having the SIS 85C471 chipset.. Should it be possible to use an other manufacturer bios from an other brand with the same chipset.. Because i dont think there might be an newer bios for this motherboard.. So maybe i also can solve this 5x86 motherboard problem with.

I tried it out with that different brand of manufacturer bios, but it seems it just works on the chaintech motherboard.. Now it sees the full AMD 5x86 P75-133 mhz processor on boot.. And i got rid of that Y2K bug 😈 🤣 The bios iam using now is from a freetech motherboard i recently gave the same new bios upgrade.. 😀

~ At least it can do black and white~

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