Cybervision 64 memory

bobsmith2012 · 01 October 2010, 04:53

I have been searching for information on what memory chips to use to upgrade my Cybervision 64 to 4MB ram.

I have a Trio64V+ that has 2MB of socketed chips and wanted to find out if I can use them.

They are 2x GM71C4260CJ60 and 2x HY514264BJC-70

Thanks

rkauer · 02 October 2010, 05:53

You need to be sure you have four 262,144-word (256k bytes) x 16-bit Dynamic Random Access Memory with at least 70ns of access speed and the very same pinout.

The types you post here are compatible. Check the datasheets on the internet if you are in doubt.

Ratte · 02 October 2010, 18:27

I bought a secound hand s3trio gfxcard and unsoldered the ram.
after cleaning the memorypads my cv64 had 4mb (60 + 50ns mem).
http://www.a1k.org/forum/showthread.php?t=11780
It costs me about half an hour for unsoldering and cleaning and 2 euros for the old peecee gfx-card.

01 October 2010, 04:53	#1
bobsmith2012 Registered User Join Date: Jul 2010 Location: Melbourne Posts: 11	Cybervision 64 memory I have been searching for information on what memory chips to use to upgrade my Cybervision 64 to 4MB ram. I have a Trio64V+ that has 2MB of socketed chips and wanted to find out if I can use them. They are 2x GM71C4260CJ60 and 2x HY514264BJC-70 Thanks

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02 October 2010, 05:53	#2
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	You need to be sure you have four 262,144-word (256k bytes) x 16-bit Dynamic Random Access Memory with at least 70ns of access speed and the very same pinout. The types you post here are compatible. Check the datasheets on the internet if you are in doubt.

02 October 2010, 18:27	#3
Ratte Registered User Join Date: Sep 2008 Location: Germany Posts: 331	I bought a secound hand s3trio gfxcard and unsoldered the ram. after cleaning the memorypads my cv64 had 4mb (60 + 50ns mem). http://www.a1k.org/forum/showthread.php?t=11780 It costs me about half an hour for unsoldering and cleaning and 2 euros for the old peecee gfx-card.

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