13 Feb
2013
13 Feb
'13
2:39 p.m.
Is a ceramic NEC D765D worth anything?
It's soldered on an adapter board for a bus I don't recognize. Other
parts on the board have 1977 date codes.
I pulled it out of a recycle bin, so I have no clue what it belongs
to. I assume it's a floppy controller, seeing as it has two 34-pin
headers...
Doc
13 Feb
13 Feb
2:52 p.m.
What is the PN on the board? Is there any brand visible?
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
On Behalf Of Doc Shipley
Sent: Wednesday, February 13, 2013 1:40 PM
To: CCtalk
Subject: NEC D765D
Is a ceramic NEC D765D worth anything?
It's soldered on an adapter board for a bus I don't recognize. Other
parts on the board have 1977 date codes.
I pulled it out of a recycle bin, so I have no clue what it belongs to.
I assume it's a floppy controller, seeing as it has two 34-pin headers...
Doc
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2897 / Virus Database: 2639/6099 - Release Date: 02/12/13
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2897 / Virus Database: 2639/6099 - Release Date: 02/12/13
3:58 p.m.
On 2/13/13 1:52 PM, Cindy Croxton Electronics Plus wrote:
What is the PN on the board? Is there any brand
visible?
There are a couple of numbers on it, both on the off-side of the board:
B-4468208-01 in the solder mask on the bulkhead end
EC 869247A silk-screened on the other end
The edge connector, 62 pins, is oriented and positioned like an ISA
card, but the tail of the board drops *lower* than the fingers.
Doc
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
On Behalf Of Doc Shipley
Sent: Wednesday, February 13, 2013 1:40 PM
To: CCtalk
Subject: NEC D765D
Is a ceramic NEC D765D worth anything?
It's soldered on an adapter board for a bus I don't recognize. Other
parts on the board have 1977 date codes.
I pulled it out of a recycle bin, so I have no clue what it belongs to.
I assume it's a floppy controller, seeing as it has two 34-pin headers...
Doc
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2897 / Virus Database: 2639/6099 - Release Date: 02/12/13
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2897 / Virus Database: 2639/6099 - Release Date: 02/12/13
4:35 p.m.
I have seen plenty of 8-bit and 16-bit floppy controllers where the end
drops lower than the connectors, especially if the card is very long; it
supports the card in the case or the motherboard. Usually there is a brand
of some sort. Sorry, I can't identify it by the numbers you gave. Maybe if
you could post a pic somewhere of the front and back?
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
On Behalf Of Doc Shipley
Sent: Wednesday, February 13, 2013 2:59 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: NEC D765D
On 2/13/13 1:52 PM, Cindy Croxton Electronics Plus wrote:
What is the PN on the board? Is there any brand
visible?
There are a couple of numbers on it, both on the off-side of the board:
B-4468208-01 in the solder mask on the bulkhead end
EC 869247A silk-screened on the other end
The edge connector, 62 pins, is oriented and positioned like an ISA card,
but the tail of the board drops *lower* than the fingers.
Doc
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
On Behalf Of Doc Shipley
Sent: Wednesday, February 13, 2013 1:40 PM
To: CCtalk
Subject: NEC D765D
Is a ceramic NEC D765D worth anything?
It's soldered on an adapter board for a bus I don't recognize. Other
parts on the board have 1977 date codes.
I pulled it out of a recycle bin, so I have no clue what it belongs
to.
I assume it's a floppy controller, seeing as it
has two 34-pin headers...
Doc
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2897 / Virus Database: 2639/6099 - Release Date: 02/12/13
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2897 / Virus Database: 2639/6099 - Release Date: 02/12/13
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2897 / Virus Database: 2639/6099 - Release Date: 02/12/13
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2897 / Virus Database: 2639/6099 - Release Date: 02/12/13
5:29 p.m.
I would be interested in a ceramic uPD765 for decapsulation purposes.
--Dave
On Wed, Feb 13, 2013 at 4:35 PM, Cindy Croxton Electronics Plus
<sales at elecplus.com> wrote:
I have seen plenty of 8-bit and 16-bit floppy
controllers where the end
drops lower than the connectors, especially if the card is very long; it
supports the card in the case or the motherboard. Usually there is a brand
of some sort. Sorry, I can't identify it by the numbers you gave. Maybe if
you could post a pic somewhere of the front and back?
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
On Behalf Of Doc Shipley
Sent: Wednesday, February 13, 2013 2:59 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: NEC D765D
On 2/13/13 1:52 PM, Cindy Croxton Electronics Plus wrote:
What is the PN on the board? Is there any brand
visible?
There are a couple of numbers on it, both on the off-side of the board:
B-4468208-01 in the solder mask on the bulkhead end
EC 869247A silk-screened on the other end
The edge connector, 62 pins, is oriented and positioned like an ISA card,
but the tail of the board drops *lower* than the fingers.
Doc
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
On Behalf Of Doc Shipley
Sent: Wednesday, February 13, 2013 1:40 PM
To: CCtalk
Subject: NEC D765D
Is a ceramic NEC D765D worth anything?
It's soldered on an adapter board for a bus I don't recognize. Other
parts on the board have 1977 date codes.
I pulled it out of a recycle bin, so I have no clue what it belongs
to.
I assume it's a floppy controller, seeing as
it has two 34-pin headers...
Doc
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2897 / Virus Database: 2639/6099 - Release Date: 02/12/13
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2897 / Virus Database: 2639/6099 - Release Date: 02/12/13
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2897 / Virus Database: 2639/6099 - Release Date: 02/12/13
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2897 / Virus Database: 2639/6099 - Release Date: 02/12/13
5:34 p.m.
On 02/13/2013 02:52 PM, Cindy Croxton Electronics Plus wrote:
What is the PN on the board? Is there any brand
visible?
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
On Behalf Of Doc Shipley
Sent: Wednesday, February 13, 2013 1:40 PM
To: CCtalk
Subject: NEC D765D
Is a ceramic NEC D765D worth anything?
Not really. it was NEC made FDC that
was later second sourced as 8272.
The early parts were released mid 1980.
Its a floppy controller chip.
It's soldered on an adapter board for a bus I
don't recognize. Other
parts on the board have 1977 date codes.
I pulled it out of a recycle bin, so I have no clue what it belongs to.
I assume it's a floppy controller, seeing as it has two 34-pin headers...
IF it has two bus edge connectors it may have been Intel Multibus.
Allison
Doc
3:26 p.m.
On Feb 13, 2013, at 2:39 PM, Doc Shipley <doc at vaxen.net> wrote:
Is a ceramic NEC D765D worth anything?
It's soldered on an adapter board for a bus I don't recognize. Other parts on
the board have 1977 date codes.
I pulled it out of a recycle bin, so I have no clue what it belongs to. I assume
it's a floppy controller, seeing as it has two 34-pin headers...
I certainly can't imagine much else a ?PD765 would be used for.
No idea about the value, though.
- Dave
7:01 p.m.
On 02/13/2013 12:26 PM, David Riley wrote:
On Feb 13, 2013, at 2:39 PM, Doc Shipley <doc at
vaxen.net> wrote:
Maybe to a collector. This is the NEC chip with the long "blind spot"
after the index, so it's sort of limited in utility. The 765AD would
have the modern timing.
--Chuck
Is a ceramic NEC D765D worth anything?
It's soldered on an adapter board for a bus I don't recognize. Other parts on
the board have 1977 date codes.
I pulled it out of a recycle bin, so I have no clue what it belongs to. I assume
it's a floppy controller, seeing as it has two 34-pin headers...
I certainly can't imagine much else a ?PD765 would be used for.
No idea about the value, though. 
7:28 p.m.
[floppy]
On Wed, 13 Feb 2013, David Riley wrote:
I certainly can't imagine much else a ?PD765 would
be used for.
not really anything, since that is what it is, but perhaps in a
dedicated controller for a tape drive that was originally intended
to connect to a floppy port?
(STILL floppy controller, but sometimes not also usable for real
floppy drives)
No idea about the value, though.
zilch. doubtful that that one can do MFM 128 byte sectors, etc.
Allison would surely know all of the details about it!
But, it should fetch plenty on eBay as R at RE
10:12 p.m.
On 02/13/2013 07:28 PM, Fred Cisin wrote:
FM yes, MFM no.
[floppy]
On Wed, 13 Feb 2013, David Riley wrote:
It was the first version in ceramic. Hardly rare.
I certainly can't imagine much else a ?PD765
would be used for.
not really anything, since that is what it is, but perhaps in a
dedicated controller for a tape drive that was originally intended
to connect to a floppy port?
(STILL floppy controller, but sometimes not also usable for real
floppy drives) No idea about
the value, though.
zilch. doubtful that that one can do MFM 128 byte sectors,
etc.
Allison would surely know all of the details about it! But, it should fetch plenty on eBay as R at RE
Barnum was right.
Allison
4182
days inactive
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days old
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ajp166＠verizon.net -
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