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

[Fabrizio Vasile]

Hi John,
maybe  this thread can help you:

http://www.eevblog.com/forum/testgear/dallas-nonvolatile-ram-chips-battery-surgery/msg263224/#msg263224

----- Original Message ----- 
From: "John Robertson" <jrr at flippers.com>
To: <techtoolslist at flippers.com>
Sent: Friday, July 26, 2013 11:08 PM
Subject: Re: [Techtoolslist] Alpha Electronics Dynamic Integrated Digital IC 
Tester on eBay



> Update to TTL:

>

> Tom tried reading the data and was unsuccessful and since then the device 

> won't boot - so he sent it to me, I then tried reading the DS-1230 with my 

> Xeltek and got what appears to be a fair bit of reasonable data. My 

> earlier read of my DS-1230 got a some of what also looks like it may be 

> valid data so I'm hoping that these two files can be merged to produce a 

> working image.

>

> Not that I have any time though to do this.

>

> Anyone here familiar enough with Z80 code interested in looking at the two 

> files and see if anything can be done?

>

> I'm putting the two files on the FTP site so folks can take a look-see...

>

> 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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>>

>>

>

>

> -- 

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