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cpuguru
Joined: 03 Feb 2009
Posts: 10
Location: Yuma,AZ
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 Posted: Sun Feb 15, 2009 9:22 am Post subject: stacked memory |
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Somewhere I have 8 "stacked" ceramic ram chips. I first saw those in use in an early IBM-AT. That was a way to increase memory from 64K to 128K.
When I find them, I'll post a photo. Does anyone else have these in their collection?
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35 year computer industry veteran
See my collection here:
http://tech.groups.yahoo.com/group/CPU_collectors_AZ/ |
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Chiefish
Joined: 23 Sep 2007
Posts: 2153
Location: Northwest N.J. U.S.A
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| Posted: Sun Feb 15, 2009 9:32 am Post subject: |
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I dont have any in my collection, but i have seen them many times before, They look like little double decker buses.  Thats is exactly why they were stacked was to increase the memory and not the space required to have it in. I think they are pretty interesting chips myself, showing some early inginuity. 
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"The only reason for time is so that everything doesn't happen at once." A.E. |
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JAC
Joined: 24 Jul 2005
Posts: 3469
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| Posted: Sun Feb 15, 2009 11:32 am Post subject: |
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| I like the SIPP memory modules. |
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donutty
Joined: 16 Feb 2008
Posts: 1122
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| Posted: Sun Feb 15, 2009 5:45 pm Post subject: |
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| JAC wrote: | | I like the SIPP memory modules. |
You want some? |
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JAC
Joined: 24 Jul 2005
Posts: 3469
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| Posted: Sun Feb 15, 2009 6:09 pm Post subject: |
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| donutty wrote: | | JAC wrote: | | I like the SIPP memory modules. |
You want some? |
nah.. I got loads, and a couple mobos. More of a nostalgic thing for me. |
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UMMR
Joined: 23 Aug 2007
Posts: 381
Location: Udine, ITALY
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| Posted: Wed Nov 18, 2009 11:20 am Post subject: Re: stacked memory |
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| cpuguru wrote: | Somewhere I have 8 "stacked" ceramic ram chips. I first saw those in use in an early IBM-AT. That was a way to increase memory from 64K to 128K.
When I find them, I'll post a photo. Does anyone else have these in their collection? |
Hello from Italy,
I have seen many IBM memory cards with stacked chips, either ceramic and plastic DIPs. Here are two examples taken from my website:
http://ummr.altervista.org/tenpictures.htm (see the picture DSCN5864.jpg, IBM System/23 Datamaster)
http://ummr.altervista.org/ (picture memparagon.jpg).
The first picture is better, the second shows a bigger card.
Stacked-chips cards are relatively common in System/34 and /32 machines. Nice cards indeed.
Best,
Paolo |
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