Testing NTE 2107 memory chip

N

Nick

Guest
Does anyone have a way of testing an old memory chip? I have a whole bunch
of these out of an old Allen Bradley control cabinet. Some of them are
marked P 2107 C-2. They are also described as IC-MOS 4K DRAM Chip. There
are 22 pin IC package and I have hundreds of them that need to be tested. I
have a BK 575 tester but it won't do the job and BK does not have any
updates.

Is there another chip out there in a different package but with the same
type of pinouts where I can adapt it to the different chip that possibly the
BK 575 can test.

A bread-boarded test circuit would be nice also.

Any help would be appreciated.

Thanks,
Nick
 
"Nick" <nospam@hotmail.com> wrote in message
news:KOhGh.2957$Oc.168200@news1.epix.net...

Does anyone have a way of testing an old memory chip? I have a whole bunch
of these out of an old Allen Bradley control cabinet. Some of them are
marked P 2107 C-2. They are also described as IC-MOS 4K DRAM Chip. There
are 22 pin IC package and I have hundreds of them that need to be tested.
I have a BK 575 tester but it won't do the job and BK does not have any
updates.
Click to expand...
Why do you want to test them? I'd be more likely to replace old DRAM with
SRAM these days - much cheaper.
 
Nick wrote:

I have hundreds of them that need to be tested.
Click to expand...
What on earth for ? Are you planning to re-use them somehow ?

Graham
 
DRAM is so low on both Operating

power and refresh m they call it PSRAM .

It can refresh at about .0001 amp .

I have 10 Nintendo DS Lite game-boxes

im hacking . They are the lowest cost

method , i have to get PSRAM .

A 100 MB HDD is easily hooked to

the slot-2 of DS Lite .

I also have GP2X , HDD is easy , cause

of USB host .








On Mar 3, 1:47 pm, "Homer J Simpson" <nob...@nowhere.com> wrote:
"Nick" <nos...@hotmail.com> wrote in message

news:KOhGh.2957$Oc.168200@news1.epix.net...

Does anyone have a way of testing an old memory chip? I have a whole bunch
of these out of an old Allen Bradley control cabinet. Some of them are
marked P 2107 C-2. They are also described as IC-MOS 4K DRAM Chip. There
are 22 pin IC package and I have hundreds of them that need to be tested.
I have a BK 575 tester but it won't do the job and BK does not have any
updates.

Why do you want to test them? I'd be more likely to replace old DRAM with
SRAM these days - much cheaper.
Click to expand...
 
The idea is to repair the entire memory card and return it to service. There
are 4 of these cards with about 30 of these memory chips on each one.



"Nick" <nospam@hotmail.com> wrote in message
news:KOhGh.2957$Oc.168200@news1.epix.net...
Does anyone have a way of testing an old memory chip? I have a whole bunch
of these out of an old Allen Bradley control cabinet. Some of them are
marked P 2107 C-2. They are also described as IC-MOS 4K DRAM Chip. There
are 22 pin IC package and I have hundreds of them that need to be tested.
I have a BK 575 tester but it won't do the job and BK does not have any
updates.

Is there another chip out there in a different package but with the same
type of pinouts where I can adapt it to the different chip that possibly
the BK 575 can test.

A bread-boarded test circuit would be nice also.

Any help would be appreciated.

Thanks,
Nick
Click to expand...
 
"Nick" <nospam@hotmail.com> wrote in message
news:XyrGh.2972$Oc.168649@news1.epix.net...

The idea is to repair the entire memory card and return it to service.
There are 4 of these cards with about 30 of these memory chips on each
one.
Click to expand...
You might have to build a tester, perhaps one just for these cards.
 
"Homer J Simpson" <nobody@nowhere.com> wrote in message
news:kNuGh.3493$cE3.209@edtnps89...
"Nick" <nospam@hotmail.com> wrote in message
news:XyrGh.2972$Oc.168649@news1.epix.net...

The idea is to repair the entire memory card and return it to service.
There are 4 of these cards with about 30 of these memory chips on each
one.

You might have to build a tester, perhaps one just for these cards.
Click to expand...
 
I'd be glad to build a tester for this chip - would solve a real time
waster. Now what I do is put a half dozen new chips on the board and see if
the exec program for the machine will load. Then I do the Cristmas tree
light thing untill I get the bad chips in my hand.

Nick



"Homer J Simpson" <nobody@nowhere.com> wrote in message
news:kNuGh.3493$cE3.209@edtnps89...
"Nick" <nospam@hotmail.com> wrote in message
news:XyrGh.2972$Oc.168649@news1.epix.net...

The idea is to repair the entire memory card and return it to service.
There are 4 of these cards with about 30 of these memory chips on each
one.

You might have to build a tester, perhaps one just for these cards.
Click to expand...
 
"Nick" <nospam@hotmail.com> wrote in message
news:MEBGh.2976$Oc.168915@news1.epix.net...

I'd be glad to build a tester for this chip - would solve a real time
waster. Now what I do is put a half dozen new chips on the board and see
if the exec program for the machine will load. Then I do the Cristmas tree
light thing untill I get the bad chips in my hand.
Click to expand...
ISTR that PopTronics and or Radio Electronics published similar testers back
when these were useful. Try a big city library if you can.
 
On Sun, 04 Mar 2007 15:33:00 GMT, "Nick" <nospam@hotmail.com> put
finger to keyboard and composed:

I'd be glad to build a tester for this chip - would solve a real time
waster. Now what I do is put a half dozen new chips on the board and see if
the exec program for the machine will load. Then I do the Cristmas tree
light thing untill I get the bad chips in my hand.
Click to expand...
Does the board have a CPU (eg Z80) with a discrete PROM/EPROM? If so,
how hard would it be to program a debug monitor or memory tester into
your own ROM?

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
 
The board is about 16" square with edge connectors along 1 side and it
plugs into a backpane with a bunch of other cards. There is no real CPU or
such as these are 1980 CNC controls. There are 34 of these 2107 chips in
sockets on each card and they need to be pulled and checked. The easiest way
would be a sister card adapted to my BK 575 IC tester.
There are no EPROM's on these cards, so something else would have to be
done.


"Franc Zabkar" <fzabkar@iinternode.on.net> wrote in message
news:kf6nu29h2jk16ds1ulak51en2qoho9kltb@4ax.com...
On Sun, 04 Mar 2007 15:33:00 GMT, "Nick" <nospam@hotmail.com> put
finger to keyboard and composed:

I'd be glad to build a tester for this chip - would solve a real time
waster. Now what I do is put a half dozen new chips on the board and see
if
the exec program for the machine will load. Then I do the Cristmas tree
light thing untill I get the bad chips in my hand.

Does the board have a CPU (eg Z80) with a discrete PROM/EPROM? If so,
how hard would it be to program a debug monitor or memory tester into
your own ROM?

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
Click to expand...
 
On 2007-03-03 08:58:18 -0800, "Nick" <nospam@hotmail.com> said:

Does anyone have a way of testing an old memory chip? I have a whole bunch
of these out of an old Allen Bradley control cabinet. Some of them are
marked P 2107 C-2. They are also described as IC-MOS 4K DRAM Chip. There
are 22 pin IC package and I have hundreds of them that need to be tested. I
have a BK 575 tester but it won't do the job and BK does not have any
updates.

Is there another chip out there in a different package but with the same
type of pinouts where I can adapt it to the different chip that possibly the
BK 575 can test.

A bread-boarded test circuit would be nice also.

Any help would be appreciated.

Thanks,
Nick
Click to expand...
One way to check if a DRAM is working is to simply jam a second
Known-to-be-good DRAM on top of the suspect one. This often works!

Otherwise there are testers out there on eBay - RAMCHECK, BUGTRAP, and
others made test units that would handle these.

John :-#)#
--
(Please post followups or tech enquires to the newsgroup) John's
Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com "Old pinballers never die, they
just flip out."
 
On 2007-03-03 08:58:18 -0800, "Nick" <nospam@hotmail.com> said:

Does anyone have a way of testing an old memory chip? I have a whole bunch
of these out of an old Allen Bradley control cabinet. Some of them are
marked P 2107 C-2. They are also described as IC-MOS 4K DRAM Chip. There
are 22 pin IC package and I have hundreds of them that need to be tested. I
have a BK 575 tester but it won't do the job and BK does not have any
updates.

Is there another chip out there in a different package but with the same
type of pinouts where I can adapt it to the different chip that possibly the
BK 575 can test.

A bread-boarded test circuit would be nice also.

Any help would be appreciated.

Thanks,
Nick
Click to expand...
Oh, wait, is the 2107 an 18 pin with triple supply? Then there are not
very many test fixtures for it...

John :-#(#
--
(Please post followups or tech enquires to the newsgroup) John's
Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com "Old pinballers never die, they
just flip out."
 
It's a 22 pin dip. http://www.nteinc.com/specs/2100to2199/pdf/nte2107.pdf is
all the details.
Nick




"John Robertson" <spam@flippers.com> wrote in message
news:2007030510211211272-spam@flipperscom...
On 2007-03-03 08:58:18 -0800, "Nick" <nospam@hotmail.com> said:

Does anyone have a way of testing an old memory chip? I have a whole
bunch
of these out of an old Allen Bradley control cabinet. Some of them are
marked P 2107 C-2. They are also described as IC-MOS 4K DRAM Chip.
There
are 22 pin IC package and I have hundreds of them that need to be tested.
I
have a BK 575 tester but it won't do the job and BK does not have any
updates.

Is there another chip out there in a different package but with the same
type of pinouts where I can adapt it to the different chip that possibly
the
BK 575 can test.

A bread-boarded test circuit would be nice also.

Any help would be appreciated.

Thanks,
Nick

Oh, wait, is the 2107 an 18 pin with triple supply? Then there are not
very many test fixtures for it...

John :-#(#
--
(Please post followups or tech enquires to the newsgroup) John's Jukes
Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call (604)872-5757
or Fax 872-2010 (Pinballs, Jukes, Video Games) www.flippers.com
"Old pinballers never die, they just flip out."
Click to expand...
 
On Mar 4, 5:58 am, "Nick" <nos...@hotmail.com> wrote:
Does anyone have a way of testing an old memory chip? I have a whole bunch
of these out of an old Allen Bradley control cabinet. Some of them are
marked P 2107 C-2. They are also described as IC-MOS 4K DRAM Chip. There
are 22 pin IC package and I have hundreds of them that need to be tested.
Click to expand...
Buy this unit on Ebay
http://cgi.ebay.com/Eventide-H-910-clockworks-Harmonizer_W0QQitemZ150096777410QQihZ005QQcategoryZ23790QQrdZ1QQcmdZViewItem
Take the lid off it and you'll see a row of DRAMs just like the ones
you want to test, they are socketed.
The Right hand one is the most significant bit
Set the harmoniser up as a simple digital delay
Feed a signal generator at, say, 1khz, in the input and monitor the
output on an amp and speaker.
Go through your pile of dram chips one at a time, substituting them in
the MSB socket, turning off while doing the swaps.
Discard the chips that turn the sound to crap.
If you want an easy life, plug a 22pin 0.4" zif socket in the MSB
socket.
Sell the Eventide on Ebay
M
M
 
"moby" <moby@kcbbs.gen.nz> wrote in
news:1173171537.930786.200990@c51g2000cwc.googlegroups.com:

On Mar 4, 5:58 am, "Nick" <nos...@hotmail.com> wrote:
Does anyone have a way of testing an old memory chip? I have a whole
bunch of these out of an old Allen Bradley control cabinet. Some of
them are marked P 2107 C-2. They are also described as IC-MOS 4K
DRAM Chip. There are 22 pin IC package and I have hundreds of them
that need to be tested.

Buy this unit on Ebay
http://cgi.ebay.com/Eventide-H-910-clockworks-Harmonizer_W0QQitemZ15009
6777410QQihZ005QQcategoryZ23790QQrdZ1QQcmdZViewItem Take the lid off
it and you'll see a row of DRAMs just like the ones you want to test,
they are socketed. The Right hand one is the most significant bit
Set the harmoniser up as a simple digital delay
Feed a signal generator at, say, 1khz, in the input and monitor the
output on an amp and speaker.
Go through your pile of dram chips one at a time, substituting them in
the MSB socket, turning off while doing the swaps.
Discard the chips that turn the sound to crap.
If you want an easy life, plug a 22pin 0.4" zif socket in the MSB
socket.
Sell the Eventide on Ebay
M
M
Click to expand...
Nice. More fun than a dedicated tester (which might cost nearly as much if
it's hard to get), and as the Harmoniser is well-liked by many, is
guaranteed to resell, and for a profit if you get some nice big photos and
a good description. Unless you damage the Harmoniser, it's unlikely that
you could lose money this way, and you might like it enough to keep it and
use it.
 
moby <moby@kcbbs.gen.nz> wrote:
On Mar 4, 5:58 am, "Nick" <nos...@hotmail.com> wrote:
Does anyone have a way of testing an old memory chip? I have a whole bunch
of these out of an old Allen Bradley control cabinet. Some of them are
marked P 2107 C-2. They are also described as IC-MOS 4K DRAM Chip. There
are 22 pin IC package and I have hundreds of them that need to be tested.
Click to expand...
Buy this unit on Ebay
http://cgi.ebay.com/Eventide-H-910-clockworks-Harmonizer_W0QQitemZ150096777410QQihZ005QQcategoryZ23790QQrdZ1QQcmdZViewItem
Take the lid off it and you'll see a row of DRAMs just like the ones
you want to test, they are socketed.
The Right hand one is the most significant bit
Set the harmoniser up as a simple digital delay
Feed a signal generator at, say, 1khz, in the input and monitor the
output on an amp and speaker.
Go through your pile of dram chips one at a time, substituting them in
the MSB socket, turning off while doing the swaps.
Discard the chips that turn the sound to crap.
If you want an easy life, plug a 22pin 0.4" zif socket in the MSB
socket.
Sell the Eventide on Ebay



The old Space Invaders video game used the same DRAMs. Although
not part of the Bally/Midway ROM set, there does exist a self-test
ROM that you can install to test the RAMs and other game aspects.
You should be able to find the test ROM by doing google searches;
then all you'd need to do is pick up a working boardset on Ebay;
generally less than $150. The RAM test is an audio "beep" code,
so you would only need a speaker; the boadset has an audio amp,
so no need for external amplification. Wire up a test fixture
using pinouts for SI easily found through google searches; you
would need an external power supply for -5VDC, +5VDC, and +12VDC
(all voltages are needed for the DRAMs).

Best Regards,

John Hermann
Buy, Sell, Trade, and Repair Video and Pinball Machines.
Located near Dallas, TX.
http://www.geocities.com/SiliconValley/Circuit/8393
 
On 2007-03-09 13:56:00 -0800, John Hermann
<jhermann@pinnacle.dal.design.ti.com> said:

moby <moby@kcbbs.gen.nz> wrote:
On Mar 4, 5:58 am, "Nick" <nos...@hotmail.com> wrote:
Does anyone have a way of testing an old memory chip? I have a whole bunch
of these out of an old Allen Bradley control cabinet. Some of them are
marked P 2107 C-2. They are also described as IC-MOS 4K DRAM Chip. There
are 22 pin IC package and I have hundreds of them that need to be tested.
Click to expand...
Look for the Bugtrap 8000 RAM tester. I believe it can be modified to
test your RAM. I am looking to make an adapter for mine in fact, along
with being able to test 2114s...

John :-#)#

--
(Please post followups or tech enquires to the newsgroup) John's
Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com "Old pinballers never die, they
just flip out."
 
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