Re: Alpha Electronics Dynamic Integrated Digital IC Tester on eBay

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@flippers.com>
To: <techtoolslist@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@flippers.com
>> <mailto:jrr@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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Received on Sat Jul 27 11:56:16 2013