RogrWilco wrote:[...]
Unfortunately, I only realized after I bought the motherboard that it doesn't have any SRAM. Could you folks help me source something? I'll be running a 486DX/2-66 and 16 MB RAM, so not sure if I should install 128 or 256K of SRAM.
Not sure about exact figures, but the difference between no L2 and 128kB is going to be huge, the difference between 128kB and 256kB measurable but much smaller. Probably won't cost any more, so might as well do 256kB if you're at it.
I'm looking at this item on eBay. https://tinyurl.com/y37kacbq.
Does this stuff look genuine or counterfeit to you folks?
Really shitty photograph doesn't inspire confidence or allow close scrutiny, but I'd trust the USD 6.41 chips I see in "People who viewed this also viewed"-section a lot more. Either way they strike me as overpriced.
Also, I think the "15" denotes 15 ns, but the manual for my board seems to expect 20 ns. Would there be compatibility problems?
Those 15/20ns relate to cycle time. Less=shorter=faster, so you can use 15ns chips in any application requiring >= 15ns. 20ns > 15ns so no problem, assuming the 64kx8 chip structure is supported in the first place. Reading here 4 64kx8 chips are fine for 256kB, as long as also use a single 16kx8 or 32kx8 SRAM chip for tag.
Any other tips on sourcing this SRAM would be appreciated.
Tricky. If you 'process' lots of motherboards you end up with piles of this stuff for almost nothing. I guess lots of people have that stuff - I certainly do - but the trick is finding someone nearby. I'd be willing to part with a set for the price of shipping and a nice craft beer - but seeing as you're linking to the US eBay, by the time you've shipped that stuff it would have been cheaper to buy those parts on eBay...
