RE: 6502 with logic sniffer

-----Message d'origine-----
De : owner-cbm-hackers@musoftware.de [mailto:owner-cbm-hackers@musoftware.de] De la part de Uffe Jakobsen
Envoyé : vendredi 2 janvier 2015 23:36
À : cbm-hackers@musoftware.de
Objet : Re: 6502 with logic sniffer



On 2015-01-02 23:09, didier derny wrote:
>> The cbm3000 had a relatively short life around 1979/1980
>>
>> I'm using this product: 
>> http://dangerousprototypes.com/open-logic-sniffer/
>>
>> I give up this product is hell, loosing the usb serial port (need 
>> reboot each time it is disconnected) The documentation is poor, 
>> browsing a lot of web pages to find some elementary information's
>>
>
> Aah, yes the Open Bench LogicSniffer, I have one of those.
>
> Are you using the OLS java GUI ?

Yes I'm using OLS

>
> I have no serial port problems on linux - but guessing from your mail-client I guess that you are on > Windows.
>
>> Apparently the vhdl code for this specific model is not available (I 
>> wanted to check the .ucf file to find the information I needed)
>
> Yes, It seems to closed source - there seems to be no development on its features (and bugs) - it is > a dead project.
>

It's a particularity  of "open" project, they are often  tightly "closed"

>> Compared to other commercial LAs its proces is extremely low for up to
>> 32 channels.
>>
>>It has some nice features- up to 200Mhz sampling - *BUT* only 216k sampling memory (not so nice). >>That is compensated by its ability to do RLE compression of its samples - which often can save you >>especially with low-frequency retro systems like CBMs where it in theory can stream the RLE samples >>to the host system "forever"...

The one I was using in 1981 could only record 256 events x 32 channels
Most of the time it was sufficient to debug [or crack a dongle in 10mn] (was not the official use) :)

The nice part was that it was very easy to use the external clock / external trigger
It also had IEEE-488 to transfer the data to another computer.

>>
>> It is brand new but one channel is not responding...
>>
>
> You do know that it is only the first 16 channels that are buffered and thereby 5-volt tolerant ?
> 
> The next 16 channels are unbuffered - and hence they are not 5 volt tolerant.
> 
> For the last 16 channels to become 5 volt tolerant you need the OLS input buffer wing - a separate > add on.

Yes, I've bought and installed the add on
I traced the missing signal, it cross the level shifter correctly and reach the fpga

>> http://www.seeedstudio.com/depot/Logic-Sniffer-16bit-Input-Buffer-Wing-p-721.html

> Anyway I've never used the clock-input pins on the OLS - but a (quick) look at the traces on the PCB > shows that they are running directly to the FPGA - and hence I suspect that neither of CKI,TRGI,TRGO > are 5v tolerant either...

That’s what I thought, but I've not found any clear information I checked CKO I found 1.6v 

Anyway I  contact seedstudio for the failing signal
And I move to something else

I'll try my project in a few weeks with another logic analyser




/Uffe

>
> -----Message d'origine-----
> De : owner-cbm-hackers@musoftware.de 
> [mailto:owner-cbm-hackers@musoftware.de] De la part de Uffe Jakobsen 
> Envoyé : vendredi 2 janvier 2015 22:45 À : cbm-hackers@musoftware.de 
> Objet : Re: 6502 with logic sniffer
>
>
>
> On 2015-01-02 20:41, didier derny wrote:
>> To tell the truth for me amiga never existed, Commodore ended with 
>> the departure of Jack Tramiel in 1984...
>>
>> http://fr.wikipedia.org/wiki/Commodore_International#mediaviewer/File:
>> CBM3008_01_mod02_res.jpg
>
> Aaah, I see - I've never seen a CBM3xxx model - only the 
> CBM2001,40xx,80xx models
>
>>
>> I think I found how to rebuild the same thing with a logic sniffer My 
>> main problem is to know the voltage that the CKI pin can accept
>>
>> I guess it's not 5.v but I'm not sure if it's 3.3v or less
>
> Still, if you are looking for help on the list - it would help if you told what brand of logic sniffer you are using...
>
> /Uffe
>
>>
>>
>> -----Message d'origine-----
>> De : owner-cbm-hackers@musoftware.de
>> [mailto:owner-cbm-hackers@musoftware.de] De la part de Uffe Jakobsen 
>> Envoyé : vendredi 2 janvier 2015 16:39 À : cbm-hackers@musoftware.de 
>> Objet : Re: 6502 with logic sniffer
>>
>>
>>
>> On 2015-01-02 13:05, didier derny wrote:
>>> I’m trying to reproduce what I had  in 1981
>> ...
>>>
>>> then we had a software on a commodore 3000 [directly connected to 
>>> the logic analyser via IEEE-488] to disassemble the code captured by 
>>> the logic analyzer
>>>
>>
>> A Commodore 3000 - what model is that ? given that you mention the 
>> year
>> 1981 it is not an Amiga 3000 as it came out in 1990
>>
>>> recently I was using a 16 channels zeroplus but not enough channels 
>>> for a 6502
>>>
>>> so I bought a logic sniffer
>>>
>>
>> A logic sniffer is a quite generic term - are you referring to a specific product ?
>>
>> /Uffe
>>
>>




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