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

[John Robertson]

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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