Looking for some 41256 dynamic ram (256K x 1) IC's in UK.

D

David Chapman

Guest
Hi,

Does anyone (preferably in the UK) have surplus to requirements, or
know of a source of, around 50 of the old 256K x 1 dynamic RAM's such as
the Texas TMS41256 and other manufacturers' equivalent products?

If so, please e-mail me with details and price required.

TIA - Dave Chapman

David C.Chapman - Chartered Engineer. FIEE. (dcchapman@iee.org)
--------------------------------------------------------------------------
CHAPMAN ASSOCIATES is a Consultancy offering practical expertise and
design skills in the fields of counter-surveillance, electronic protection
and security. Visit our Web site at http://www.minda.co.uk
--------------------------------------------------------------------------
 
In article <ZsSxBJA7iB8BFwPR@chassis.demon.co.uk>, dave@minda.co.uk
says...
Does anyone (preferably in the UK) have surplus to requirements, or
know of a source of, around 50 of the old 256K x 1 dynamic RAM's such as
the Texas TMS41256 and other manufacturers' equivalent products?
Click to expand...
I think I still have a pair of RamPage AT memory cards
somewhere in my old stuff that were loaded with the
things. If you can't find anything on your side of
the pond...
 
Insofar as modern memory chips are faster, smaller in size,
and of greater capacity, would it not be a straightforward
matter to create a daughter board together with appropriate
glue logic in an FPGA that would plug into the (18-pin?) DIL
sockets?

That way, you're future support problems would be eased. I
mean, if you've got equipment that old that still needs support, then
the chances are that it will still need support another 10 years
down the line and then you'd have a route to guarantee that
future support.

"David Chapman" <dave@minda.co.uk> wrote in message
news:ZsSxBJA7iB8BFwPR@chassis.demon.co.uk...
Does anyone (preferably in the UK) have surplus to requirements, or
know of a source of, around 50 of the old 256K x 1 dynamic RAM's such as
the Texas TMS41256 and other manufacturers' equivalent products?
If so, please e-mail me with details and price required.
Click to expand...
 
On Thu, 20 Jan 2005 20:46:51 +0000, David Chapman <dave@minda.co.uk>
put finger to keyboard and composed:

Does anyone (preferably in the UK) have surplus to requirements, or
know of a source of, around 50 of the old 256K x 1 dynamic RAM's such as
the Texas TMS41256 and other manufacturers' equivalent products?

If so, please e-mail me with details and price required.

TIA - Dave Chapman
Click to expand...
I have over 150 (?) unused TMS41256 DRAMs, but I'm in Australia.


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.
 
Many thanks to all those nice people who responded to my posting,
particularly those who offered batches of IC's.
I now have more than enough 41256 devices to meet my particular
requirements.

ATB - Dave

David C.Chapman - Chartered Engineer. FIEE. (dcchapman@iee.org)
--------------------------------------------------------------------------
CHAPMAN ASSOCIATES is a Consultancy offering practical expertise and
design skills in the fields of counter-surveillance, electronic protection
and security. Visit our Web site at http://www.minda.co.uk
--------------------------------------------------------------------------
 
I found this seller in the USA to be very reasonable

you can contact him at this email addy

hs1948@yahoo.comxxxxxx

Remove the xxxx from his email prior to emailing him
 
Please contact me at this email address. I have many in stock. No
minimum quantity. Please remove the nospam before returning email to
me.

npspamhs1948@yahoo.com



On Thu, 20 Jan 2005 20:46:51 +0000, David Chapman <dave@minda.co.uk>
wrote:

Hi,

Does anyone (preferably in the UK) have surplus to requirements, or
know of a source of, around 50 of the old 256K x 1 dynamic RAM's such as
the Texas TMS41256 and other manufacturers' equivalent products?

If so, please e-mail me with details and price required.

TIA - Dave Chapman

David C.Chapman - Chartered Engineer. FIEE. (dcchapman@iee.org)
--------------------------------------------------------------------------
CHAPMAN ASSOCIATES is a Consultancy offering practical expertise and
design skills in the fields of counter-surveillance, electronic protection
and security. Visit our Web site at http://www.minda.co.uk
--------------------------------------------------------------------------
Click to expand...
 
On Fri, 21 Jan 2005 08:24:53 -0000, "Airy R.Bean" <Me@privacy.net> wrote:

Insofar as modern memory chips are faster, smaller in size,
and of greater capacity, would it not be a straightforward
matter to create a daughter board together with appropriate
glue logic in an FPGA that would plug into the (18-pin?) DIL
sockets?

That way, you're future support problems would be eased. I
mean, if you've got equipment that old that still needs support, then
the chances are that it will still need support another 10 years
down the line and then you'd have a route to guarantee that
future support.

"David Chapman" <dave@minda.co.uk> wrote in message
news:ZsSxBJA7iB8BFwPR@chassis.demon.co.uk...
Does anyone (preferably in the UK) have surplus to requirements, or
know of a source of, around 50 of the old 256K x 1 dynamic RAM's such as
the Texas TMS41256 and other manufacturers' equivalent products?
If so, please e-mail me with details and price required.
Click to expand...
I think 41256s were so common at the time that there will always be enough around to maintain old
systems.
A quick search for 41256 at www.findchips.com shows many hundred thousands stock.
I don't recall there being any significant difference in specs between makers
 
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