Dr. Jesus N. Gomez

Wow! Canada! Lucky you, man. It seems to me that Canada is a very nice place (even to play with our toys!).

Of course, don’t worry about the time you took. I have your invaluable help, which is the important thing. 
 

For me it is a bit like Chinese language. I understand it just a little. Of course, I understand you, and what you tell about data offset. 
 

I’ll try it out once again, taking into account all your comments. I’m very sure that it will be possible to program the 1486 again. 
 

I do have another scopes (analog ones), also with the Dallas chip (this time with the 28 pin DIL package). These are the 2465B (I have one B and one BDM). I hope I can read the chips, and program new ones (I saw new chips in Mouser).

Thanks a lot for your invaluable help, and I hope you have recharged your batteries!

Cheers

Jesus

Here it is

<p>Dear Strick: Here you have a capture of the window in which I can adjust the range to be programmed in the chip (DS1486-120). Maybe this will help.</p> <p>Thank you</p> <p></p> <p>Jesus</p> <p></p> <p><img></p>

Hello again, Strick:<br> <br> I didn't received the new pre programmed chips yet, but I bought 2 USB programmers, which supposedly supports the DS1486-120.<br> As you told, when I'm going to use your file (the smaller one, 128k), the problem is that I have no way to avoid to write the chip from the beginning; that is, from zero.<br> You know (and told so) that at the very beginning of the file is the clock data, and this part is always changing (due to the fact it has an osillator inside, and the clock is marching). So I wanted to program the chip after this small amount of data; just put inside the rest of your file. I was thinking about diconnecting the batteries. But I'm not sure if this will have any effect on the programming or not.<br> <br> I am doing this because the chips will take time to arrive from Texas to Madrid, and because I need the scope (which, BTW, it was working fine, but taked ages to startup, even with the #3 DIP switch in the 0 position).<br> <br> Thanks again for all your help, Strick.<br> <br> Jesus<br> &#160;

<p>Thanks a lot for your invaluable help, Strick.<br> <br> The truth is today I received the new programmer, and it was unable to write -even fully erase- the DS1486-120. Maybe I need to adjust the limits of the data to be written...or maybe the best way is using one GPIB to USB adapter, which I don’t have.<br> &#160;</p> <p>Fortunately -and a bit desperate- I’ve found in Ebay the new version of the two chips already programmed for my scope. I hope this will put it back in service again.And yes: I deducted by myself that the smallest file is the one for the DS1486.</p> <p>I will post here the results, once I have the new chips (with them installed you are able to check the battery voltage).</p> <p>Cheers,</p> <p>Jesus</p>

<p>Only one question, Strick: of the three files...which is which?. I mean, which one is for rhe DS1486, etc?.</p> <p></p> <p>Thank You</p> <p></p> <p>Jesus</p> <p></p>

G-R-E-A-T !!! Both the links and specially the files. Next Monday I will receive the programmer, and I will program the watchdog chip.&#160;<br> <br> Of course, I’ll keep you informed of the (I hope) progress.&#160;<br> <br> Thanks a lot&#160;<br> <br> Jesus<br> &#160;

Sorry Peter...I can not find greedbay as a place to buy the chips...could you put me a link?.<br> <br> Thank you.<br> <br> Jesus<br> &#160;

Thanks a lot, Strick!. I will receive tomorrow the new programmer which does support all the chips inside the processor board of the TDS784A (both Dallas and the EPROM). I will order new chipsets thru greedbay as you mention. I will google it.<br> <br> My only problem is that I don't have any previous copy of the watchdog contents. Silly me.<br> <br> Please, I beg you that if it is possible for you, send me the images you have. I can try them out, and I hope one will make it work again.<br> <br> Just in case, this is my email: jngpro@gmail.com<br> <br> Of course, I will inform you here about how the process is going.<br> <br> TIA, a big hug from Madrid, and let me know if I can be of any help for you. I also own another Tek scopes with Dallas chip inside, and I can make dumps to share them with you, or with anyone in trouble.<br> <br> &#160;

Hello everybody, and...HEEELP! HEEEELP!!!!.<br> <br> It seems that I have erased the data inside the Dallas DS1486-120 Watchdog timer chip. I wanted to try my dexterity with the Dremel, and everything went well. I found a couple of 3V batteries inside (one of them with 2.9V, and the another with 2.7V...no need to change, but...lithium, ya know...suddenly zero...or very close to). The thing is I am sure I did not damage any internal part. But I am almost sure that I disconnect the main battery with the Dremel (the negative pin) before applying new battery (a 2,300 mA one...). The secondary battery was fine, untouched and connected (I mean here the one which is deeper inside the Dallas chip, the one which is mounted farther from the pin #1). I don't have any backup of this chip (silly me, I thought it was only for real time generation and storage).<br> <br> First of all, I socketed the 3 main ICs (EPROM and the two Dallas chips). I have do it so to buy a programmer and extract its contents, as a safety precaution, and for sharing. I tested the scope with the new sockets installed and it worked as ever. Perfect, no problems at all. BUT when I make the change of batteries in the Dallas DS1486-120 chip, connected to the socket in the scope, turned it on...everything seems fine (video tests on screen, relay clicks, etc.), but the scope is stuck in the clock screen!!!. I am not able to boot it up again!!!. And I cutted the negative from the second battery once I connected the new one. That's for sure.<br> <br> So...what can I do?. Of course, it seems to be very clear that my problem is in the above mentioned Dallas chip (I thought it has no data inside, only realtime clock, but obviously it had data).<br> <br> I readed in another forum -just in case-, which programmer will be fine. I've found this one. It does support both Dallas chips, and also the EPROM:<br> <br> <a href="https://www.batronix.com/shop/programmer/BX32P/index.html#tabs-4" target=_blank>https://www.batronix.com/shop/programmer/BX32P/index.html#tabs-4</a><br> <br> Please, I need your help. I know that I will have it.<br> <br> I needed to connect both positive terminals of both batteries, because connecting the new one to the one closest to pin #1 does not make that the second battery inside the Dallas chip have voltage (maybe a diode between the two, or a supervisor IC?...if so, I did not use a diode, and I can install one...hope this will help).<br> <br> Thank you all.