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There is no material that is knowingly illegal here. I could probably epoxy an angled pin header right to the top of the clock generator to add third jumper.

ALI chipset M datasheet & applicatoin notes – Datasheet Archive

Besides needing to add a 3rd clock speed jumper S2 to the clock generator, I think the most difficult part of achieving 66MHz might be figuring out which jumpers are the PCI divider assuming it has one and CPU 1m487. Since I’d likely never need to use the 4V option, I could always replace the relevant divider resistor to change the 4V selection to 3.

Faster than SiS as well. Has anyone else experienced this? Return to General Old Hardware. This board isn’t as popular as the LS there’s barely any information available. Does anyone familiar with either of these boards have any comments or suggestions on any particular settings I may need to adjust on either board that may account for such a dramatic difference? If you don’t want to remove the sticker, you can usually tell if it is UV EPROM by noticing the thickness of the chip and the sandwich look to it.


I also have reason to suspect this is the clock generator for the SMT Terminator. And stick with K cache. Parity should theoretically decrease performance since it’s more overhead for the chipset to calculate the parity bits, so for the purpose of testing I was hoping to ensure parity isn’t being used on either board.

I’ll have to take a look at modbin, it would certainly be useful to have some control over parity since most of my DRAM modules are bit.

VOGONS • View topic – A Tale of Two Motherboards (ALi vs SIS)

Also, have you read this post? One thing to note: When I get some time tonight I’ll look closer and see if I can figure out which jumpers are for the multipliers. I did not bother to check mine with EDO. I checked the ram sticks and 2 of them out of 3 were EDO. I’d rather not tear the sticker off to find out I’m a stickler for detailsbut I suppose I could drop the chip into to one of my device programmers and see if they can identify the chip using the device ID bits.

When looking at the manual, do you see what I mean about m14877 of any detail regarding multipliers? I’d like to be sure it’s an even comparison I suspect the memory performance differences may be related to the fact that you are using EDO memory, which not always means better performance in Thanks for the detailed reply!

This site hosts no abandonware. I would not have thought the difference so large. Perhaps RAM write to 1 ws. The more I learn, the more I realize how much I don’t know. Otherwise, yep I could sneak a trimpot in there somewhere too. Last edited by FesterBlatz on If anyone in the states has a spare S3 Treo64 they’d like to send I’d gratefully m187, otherwise I can hunt one down on eBay. I didn’t have time to save the results, but I hope to get back to it tomorrow since I’ll have the house to myself for most of the day.


This really limits its usefullness with an Am5x or Cyrix lai Others will run well at 3. For reference, I’ve attached a manual and board layout if anyone wants to take a look. That is the case with SiS boards anyway.

Dual Xeon X 4. Based on the 33MHz results there appears to be some real potential here!

M1487 B1 M1489 A1 M1451A1 M1431 A2

If I remember correctly. I had K of cache installed, which can sometimes influence what fastest cache timings are stable. The LSe manual K1487 have doesn’t explain what the individual CPU selection jumpers are, only where to put them for a particular processor. I’d be happy run some time demos. The 3 jumpers to the right of the clock generator controls the FSB.

One of my cyrix 5x chips needed 3. The one above to the left of the clock generator controls the PCI divider.

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