[Techtoolslist] Alpha Electronics Dynamic Integrated Digital IC Tester on eBay

[Rodger Boots]

Only thing I could find was at
https://sites.google.com/site/.../tektronix-bdm-1250-portable-digital-tester

Doesn't sound like anything great.

Ebay listing easier to decipher if you use the US site at
http://www.ebay.com/itm/380061776492
On Jul 17, 2013 3:11 PM, "Fabrizio Vasile" <fabrizio.vasile at gmail.com>
wrote:


> Does someone  tell me more about this piece of equpment?Thanks.

>

> http://www.ebay.it/itm/**Tektronix-851-BDM-1250-**

> Portable-Digital-Tester-Test-**Set-/380061776492<http://www.ebay.it/itm/Tektronix-851-BDM-1250-Portable-Digital-Tester-Test-Set-/380061776492>

>

>

> ----- Original Message ----- From: "John Robertson" <jrr at flippers.com>

> To: <techtoolslist at flippers.com>

> Sent: Wednesday, July 17, 2013 1:51 AM

> Subject: Re: [Techtoolslist] Alpha Electronics Dynamic Integrated Digital

> IC Tester on eBay

>

>

>  It works????

>>

>> Cool!

>>

>> This is a CMOS battery backed up RAM - it should be able to be read by a

>> good eprom burner as a 27256. Heck read it as a 27512 to be absolutely sure

>> of getting the correct memory size - it will just mirror the data if it is

>> smaller.

>>

>> The battery is under the cover on the thick IC with the warning label on

>> it. Do NOT remove the battery until you are sure you have valid data. The

>> way to be sure is to send me the file and I'll drop it in one of my chips

>> and test my unit.

>>

>> John :-#)#

>>

>>

>> On 07/16/2013 4:26 PM, Default wrote:

>>

>>> Hi Group,

>>> I couldn't help myself.  I figured at $19.95, this would be a cool

>>> little device to have even if it doesn't work.

>>> Get it in the mail, read the documentation that came with it and

>>> couldn't find a battery.  Hmm, that's odd.  But there is a power jack.  And

>>> everything looks brand new, not even dust!

>>> Pop it open, no battery but a funny thing what looks like to be a RAM

>>> stacked on something else, a few custon chips, etc.  No standard EPROMs

>>> that I could dump, bummer.

>>> kids are in bed, back to the schematic and it'll take between 9 and

>>> 12VAC.  Looked through my wall wart collection and found a 12VAC one.

>>> Wired it up, hit the switch and...

>>> COMMAND? scrolling across the screen!  Figure i'll let it run for a

>>>  half hour if there is a battery somewhere and it needs to be charged.

>>> My question to the group is, how do I dump the program on this thing?

>>> Thanks

>>>

>>>

>>> On Tue, Jul 9, 2013 at 3:46 PM, John Robertson <jrr at flippers.com<mailto:

>>> jrr at flippers.com>> wrote:

>>>

>>>     I chatted with the seller and he confirms that it does NOT power

>>>     up. So chances are the battery backed up system ROM has failed.

>>>

>>>     Item 390623172259

>>>

>>>     He reduced the price on his own from the original asking $59.95 to

>>>     $19.95.

>>>

>>>     Pity. I was hoping to find a good one to extract the program from

>>>     to save mine...

>>>

>>>     If someone here buys it and CAN extract the ROM data I'd sure like

>>>     a copy!

>>>

>>>     John :-#(#

>>>

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>>>

>>>

>>>

>>

>> --

>> John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9

>> Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames)

>>                  www.flippers.com

>> "Old pinballers never die, they just flip out"

>>

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>

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