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Otherwise, yep I could sneak a trimpot in there somewhere too. Sure enough the memory benchmarks dropped by a pretty noticeable amount, so it does seem like the ALi chipset will indeed leverage EDO RAM when available and unlike SIS, provides a tangible improvement in performance. I’d use a trimmer rather than a fixed resistor if you’re testing for an IBM 5x The one above to the left of the clock generator controls the PCI divider.

When I get some time tonight I’ll look closer and see if I can figure out which jumpers are for the multipliers.

I’ll have to take a look at modbin, it would certainly be useful to have some control over parity since m14877 of my DRAM modules are bit. And stick with K cache. Board index All times are UTC. Also, have you read this post?

(PDF) M1487 Datasheet download

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 multiplier. This really limits its usefullness with an Am5x or Cyrix 5x I’d be happy run some time demos. This board isn’t as popular as the LS there’s barely any information available.


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ALI chipset M datasheet & applicatoin notes – Datasheet Archive

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 You do not have the required 1m487 to view the files attached to this post. I’m looking forward to your test sli of EDO vs. 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. Does anyone familiar with either of these boards have any comments or suggestions on any particular settings I may need to adjust on either alo that may account for such a dramatic difference?

Last edited by FesterBlatz on There is no material that is knowingly illegal here.

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

I bought these two boards from a Ukrainian eBay seller and after some minor repairs both are in tip-top shape. I didn’t have time to save the results, but I hope to get back to it tomorrow since I’ll have the ,1487 to myself for most of the day. For reference, I’ve attached a manual and board layout if anyone wants to take a look. One thing to note: Users browsing this forum: If mm1487 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.


Others will run well at 3. If anyone in the states has a spare S3 Treo64 they’d like to send I’d gratefully accept, otherwise I can hunt one down on eBay. That is the case with SiS boards anyway. I could probably epoxy an angled pin header right to the top of the clock generator to add third jumper. I did not bother to check mine with EDO.

[SAA] Am5X86-P75-S ALi m1489 ALi M1487 T65550 ISA bus Industrial Motherboard

Based on the 33MHz results there appears to be some real potential here! I can’t find any datasheets for it. I’d like to be sure it’s an even comparison I checked the ram sticks and 2 of them out of 3 were EDO.