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09 March 2024, 12:13
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#1 |
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Registerdeaded abUser
Join Date: Sep 2013
Location: Beyond the Wall
Age: 46
Posts: 114
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My Amiga 3000 ZIP2DRAM project
My Amiga 3000 had a ZIP2SIMM adapter. However, this hindered the use any A3640-style accelerators. And since I already had some DRAM chips that are pin-compatible with the original ZIP RAM intended for the A3000, I figured I'd design my own adapter to make use of these.
It resulted in a 4-layer board with 32x KM44C1000BT and some capacitors, and it works like a charm. Top view:  Bottom view:  Mounted inside the A3000: 
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09 March 2024, 17:28
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#2 |
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Registered User
Join Date: Aug 2007
Location: USA
Posts: 360
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Nice work! Are these going to be available to buy or build?
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11 March 2024, 12:53
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#3 |
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Registerdeaded abUser
Join Date: Sep 2013
Location: Beyond the Wall
Age: 46
Posts: 114
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Thanks!
I haven't made up my mind. It is a bit tricky to mount without risking bending the connector pins, so it would be a nightmare to support. However, I have 4 boards laying loose 
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11 March 2024, 16:29
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#4 |
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Join Date: Jul 2003
Location: Helsinki / Finland
Age: 43
Posts: 9,863
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What was your approach to getting the zip connectors in the correct place? Just a pair of calipers and patience?
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11 March 2024, 17:23
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#5 | |
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Registerdeaded abUser
Join Date: Sep 2013
Location: Beyond the Wall
Age: 46
Posts: 114
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Quote:
 Took me some patience to get them all in place, and if I would ever do a re-design; I won't make single pins. That will make it easier to align and place the card on the sockets.But it works, and I can reach all the jumpers on the motherboard so I won't ever have to remove the card 
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11 March 2024, 23:04
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#6 |
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0ld0r Git
Join Date: Mar 2009
Location: Cornwall, UK
Posts: 1,581
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@ theq
How extremely enterprising of you! Amazing! 
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15 March 2024, 20:19
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#7 |
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Needs a life
Join Date: Jan 2008
Location: England
Posts: 1,707
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That's brilliant, nice work!
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15 March 2024, 20:51
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#8 |
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Amiga is my Religion
Join Date: May 2005
Location: Germany
Posts: 578
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Looks nice... and yes, fitting is a pain... you can easily connect it wrong or bend some pins... and always keep in mind the width of the space between the ZIP rows differs in Desktop and Tower...
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15 March 2024, 22:26
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#9 |
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Registered User
Join Date: Oct 2018
Location: malaga
Posts: 47
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I might be interested in mounting one of these plates. Although I have to see if I have this type of memory chips in my storage :-)
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