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Post by GiGaBiTe on Feb 6, 2008 20:21:10 GMT -5
I just pulled a whole pile of 486 cache DIPPs out of some old boards and was wanting to know how much memory was on each DIPP. The model number is UM612256FK-15 so I was assuming they were 256k a piece at 15 ns. When I looked at the board though, they were in paired slots, so does that mean they are 128k a piece and are paired to be 256k?
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oompa loompa
I AM THE GOVERNATOR 
"Git 'Er Dun!"
Posts: 1,301
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Post by oompa loompa on Feb 7, 2008 0:21:48 GMT -5
UM612256FK is a 256kbit sram, or 32 kilobytes per chip
it shouldn't be hard to find a datasheet
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Post by GiGaBiTe on Feb 7, 2008 16:19:53 GMT -5
wonder if they can be wired up in parallel or some such and add more memory to my other megadrive >.>
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oompa loompa
I AM THE GOVERNATOR
"Git 'Er Dun!"
Posts: 1,301
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Post by oompa loompa on Feb 7, 2008 20:11:49 GMT -5
it can be wired up (it's much easier on the genesis model 1), but you won't gain anything from it  |
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Post by GiGaBiTe on Feb 7, 2008 21:54:37 GMT -5
Besides being slower. The genny RAM is 10 ns and this cache is 15 ns.
Also tried finding a datasheet, most every parts site links back to alldatasheets.com which wants you to pay an arm and a leg for them, plus it doesn't have the sheet for this part, fail.
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Post by Tiido on Apr 7, 2008 11:12:16 GMT -5
MD has PSRAMs, they're 100...150ns, what you got out from your 486s are true SRAMs which are 10x faster.
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