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Dr Jefyll
 Post subject: Re: Query:
PostPosted: Sun May 17, 2020 9:02 pm 
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BillO wrote:
I hate throwing away good parts with bad boards, so I try to minimize that as much as I can.
If you do the piggyback thing while using the adapter Garth posted then you'd have a nice little module about 1 inch square -- 1 MB, and reusable. :!:

I mean 2 chips stacked vertically. The upper chip'll need its J-leads uncurled, but in my own experience that's doable enough. Just a suggestion.

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GARTHWILSON
 Post subject: Re: Query:
PostPosted: Sun May 17, 2020 10:11 pm 
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Dr Jefyll wrote:
BillO wrote:
I hate throwing away good parts with bad boards, so I try to minimize that as much as I can.
If you do the piggyback thing while using the adapter Garth posted then you'd have a nice little module about 1 inch square -- 1 MB, and reusable. :!:

I mean 2 chips stacked vertically. The upper chip'll need its J-leads uncurled, but in my own experience that's doable enough. Just a suggestion.

This was my first attempt at a 4Mx8 SRAM module, doing it per Jeff's suggestion:

Attachment:
4Mx8_c.jpg
4Mx8_c.jpg [ 35.92 KiB | Viewed 431 times ]

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Dr Jefyll
 Post subject: Re: Query:
PostPosted: Mon May 18, 2020 1:02 am 
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VERY nice, Garth!

But if stacking RAMs is the goal then we both have to concede defeat in the face of this 35-story tower! :shock:

( Part of this thread: OT: stacked (DIP) chips )

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BillO
 Post subject: Re: Query:
PostPosted: Mon May 18, 2020 10:08 pm 
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Dr Jefyll wrote:
VERY nice, Garth!

But if stacking RAMs is the goal then we both have to concede defeat in the face of this 35-story tower! :shock:

( Part of this thread: OT: stacked (DIP) chips )

:shock:

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kazzie
 Post subject: Re: Query:
PostPosted: Thu Jun 04, 2020 5:46 pm 
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BillO wrote:
Dr Jefyll wrote:
I removed both samples from the board (a defunct PCI VGA card), and if they're of any use you're welcome to them, Bill. It'd be easy enough to slip them in the mail.
Thanks for the offer Jeff, I really appreciate it but I'd have no way to solder those sockets on. Seems bit weird to put an SMD device in a SMD socket, but maybe not.

I also had a PCI graphics card with this style of socket, many moons ago (an S3 ViRGE). Two chips were soldered directly to the board, and there were two empty sockets to allow end users to add extra RAM if they wished.
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