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Alt Bass Page Icon Posted 2008-07-23 10:00 AM
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Where can i find some description of Sigmarion components?
I want to upgrade RAM to 128 MB...
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mr-mac Page Icon Posted 2008-07-23 11:55 AM
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DRAM: Infineon HYB39L256160AT-7.5 (32MBx2) a000.0000-a3ff.ffff

In this thread for full hardware details
http://www.hpcfactor.com/forums/forums/thread-view.asp?tid=10472&start=16

Was thinking about this myself but they didn't make a 64Mb chip in the same series so it would need a compatible part from diffrent manufacturer or range.

Let us know how you get on.

John

Edited by mr-mac 2008-07-23 11:56 AM
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mying99 Page Icon Posted 2008-07-24 8:01 AM
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It's a good idea!I am also wish that SigmarionIII can upgrade Ram to 128m.And this working is very good to speed of Sig3 operation!

Want to know your results of upgrading!
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mr-mac Page Icon Posted 2008-07-24 8:10 AM
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I like the idea of 128Mb so it would make it possible to have a rom that can be run as shaddow rom which should speed the device up a fair bit.

It's not going to be easy though as the current chips are BGA ones so will not be as easy to remove from the motherboard.

John

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Alt Bass Page Icon Posted 2008-07-24 10:22 AM
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It's the original memory datasheet.
http://www.datasheetcatalog.org/datasheet/infineon/1-DS_256M_LS_33V_2002-_12_20.pdf

And this is the new one, i've found...
http://www.datasheetcatalog.org/datasheets2/13/1367316_1.pdf

Frequences are the same, voltage can be 2,5 or 3,3.
I'll analyze their compatibility...
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Alt Bass Page Icon Posted 2008-07-25 10:28 AM
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The second model seems to have different pin functions...
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Alt Bass Page Icon Posted 2008-07-25 10:57 AM
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Found something interesting.
http://www.elpida.com/en/products/mobilebare.html
But only 1,95 Volts...

One more, but only 256 Mbits...
http://www.qimonda.com/mobile-ram/25-33/index.html

Edited by JHack 2008-07-25 11:06 AM
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Alt Bass Page Icon Posted 2008-07-25 11:58 AM
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One specimen from Samsung...

http://www.samsung.com/global/business/semiconductor/productInfo.do?fmly_id=136&partnum=K4M511633C

http://www.samsung.com/global/system/business/semiconductor/product/2007/6/11/MobileSDRAM/MobileSDRSDRAM/512Mbit/K4M511633C/ds_k4m511633c.pdf

Seems to be completely combatible with Sigmarion III. What do you think?
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