Re: 2164A DRAM

From: Gerrit Heitsch <>
Date: Thu, 22 Dec 2016 08:48:27 +0100
Message-ID: <>
On 12/21/2016 10:55 PM, Terry Raymond wrote:
> Hi Gerrit,
> Below was what you mentioned to me about DRAM I found your old message
> below, BTW I will try jumpering the 2164 as you mentioned see what happens.
> I think maybe the 2164A is more used in the U.S.A. :)
> Thank you,
> Terry Raymond
> ----------------------------
> If you're in Germany, get 101 047 from
> <>. That's a NOS GM71256-12 (41256), sells for 40
> Cents and will work in a C64 if you connect Pin 1 to Pin 16. There is no
> reason why it shouldn't work in a C128 or any other system that uses
> 4164, as long as the DRAM controller supplies an 8Bit refresh (VIC and
> TED do).

I tried to look up the 2164. All I could find is that those are 64Kx1 
DRAMs, you don't need any modification for those in a C128 or C64. 
Shortening Pin 1 with Pin 16 is only necessary for 256Kx1 DRAMs like the 
41256 or I mentioned 71256 above.


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Received on 2016-12-22 08:00:20

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