Many moons ago I accidentally erased the code from one of these Dyna IC testers, but another unit has finally shown up on eBay and I have an active bid on it. My plan is to archive the good code after first verifying that I can read and write to the old unit (the blown one) with some random code. The current eBay one appears to still be alive! This time I use the Fluke 9010 to extract the code... Then I will release it to the wild on the TTL FTP site, and fix both my Alphas here. Of course the Alpha device is perhaps worthless as the Chinese chip testers do everything the Alpha does and more for a just a few bucks, but it is a piece of history that needs proper archiving, and I screwed it up last time! Ebay item 264629134572 John :-#)# On 2013/08/16 8:39 a.m., John Robertson wrote:
On 08/16/2013 7:25 AM, Default wrote:
Morning John,
Just wondering if you had any luck with the program on that little bugger.
Thanks,
Tom
Hi Tom,
No, I haven't had any time to look at it further. As I said I was able to get some valid code, but apparently not enough to get this to boot.
Code is on the ftp site under Alpha if anyone wants to look at it...
John :-#(#
On Sat, Jul 27, 2013 at 11:55 AM, Fabrizio Vasile <fabrizio.vasile@gmail.com
wrote: Hi John, maybe this thread can help you:
http://www.eevblog.com/forum/**testgear/dallas-nonvolatile-** ram-chips-battery-surgery/**msg263224/#msg263224<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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