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MHz
Joined: 13 Nov 2009
Posts: 271
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 Posted: Wed Nov 25, 2009 1:52 am Post subject: U2764 and two Intel chips |
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Hi,
My last findings are: Eprom U2764 and Two Intel chips: R8206 and R8207.
I've tried to find information about MME U2764 EPROM, but there are not many. I know that it is typical 2764, but it seems to me that MME produced it in low quantity. Is it rare or common eprom?
The next chips are "Error detection and correction unit" (R8206) and "Memory Support Circuit - Dynamic RAM Controller" (R8207). I do not know if they are collectable and worth any money, but I like them. They will find place in my future cpu museum in "Other nice chips" folder.
MHz |
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Xaar
Joined: 30 Sep 2009
Posts: 319
Location: Germany
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| Posted: Wed Nov 25, 2009 2:05 am Post subject: Re: U2764 and two Intel chips |
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| MHz wrote: | | I've tried to find information about MME U2764 EPROM, but there are not many. I know that it is typical 2764, but it seems to me that MME produced it in low quantity. Is it rare or common eprom? |
I think they are really uncommon. Even Robotron computers mostly use (to my mind in 99 percent) "western" 2764 EPROMs or MME U2364 PROMs.
May I ask you where this EPROM was built in?
Best regards, Xaar.
PS: Your EPROM was made by FWE (Funkwerk Erfurt) after the reunion of Germany (date code AD = December 1990).
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CPUShack
Joined: 16 Jun 2003
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Location: State of Jefferson, USA
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MHz
Joined: 13 Nov 2009
Posts: 271
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| Posted: Wed Nov 25, 2009 2:55 am Post subject: |
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The pcb, the eprom is mounted on, is probably a txt decoder.
I bought it on our local market (flohmarkt) and the seller had more of them. If I meet him again I will buy another few modules 
MHz |
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Xaar
Joined: 30 Sep 2009
Posts: 319
Location: Germany
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| Posted: Wed Nov 25, 2009 11:04 am Post subject: |
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| MHz wrote: | The pcb, the eprom is mounted on, is probably a txt decoder.
I bought it on our local market (flohmarkt) and the seller had more of them. If I meet him again I will buy another few modules
MHz |
Well, can you make a photo of the complete pcb? I ask because I am also collecting Robotron machines. So it would be interesting where GDR products else were used 
Regards, Xaar.
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Sorry for my bad English - I'm working on it!
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MHz
Joined: 13 Nov 2009
Posts: 271
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| Posted: Fri Nov 27, 2009 1:48 am Post subject: |
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Here it is.
MHz |
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fRaSsL
Joined: 31 Mar 2003
Posts: 1570
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| Posted: Sat Nov 28, 2009 2:04 am Post subject: |
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In fact there were many more interesting EPROMs from east Germany... For example the U27C64 in 3 different speed ratings.
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