Re: Logic Analyser adevice needed

Well from my experience (7+ years doing digital ASIC development for
IBM) logic analyzers are very helpful for overall system debug. (I.E.
looking at microprocessor or peripheral transactoins, etc) For arcade
game repair, you would have to understand the architecture of the game
board in question to take full advantage of the analyzer. Now that's
not to say the analyzer can't help you.... I've used to trigger
certain read and writes to memory address that i suspected were bad,
look for erratic behavior around an IC, etc.
But I would aggree that for most debugs that I've done, I've used an
o-scope and my Fluke. Fluke tells me what type of problem the system
(arcade pcb) is seeing, and I use my logic probe and/or scope with the
schematic to find the root cause.
-Adam

On Apr 12, 2005 2:14 PM, Matthew Rossiter <matt@verio.net> wrote:
> No, not game roms. If you're trying to do some kind of code debug, it helps
> to have the mnemonics rom pack for the processor the game uses. So, if you
> want to look at what code is being executed on an Asteroids board, you'd
> need a 6502 mnemonics rom pack. It's basically a plastic cartridge similar
> to an Atari 800. Unfortunately they're pretty hard to come by. I found a
> 68000 rom pack on ebay and I believe I can pull the roms out and put burn
> some 6502 menmonics roms if I need to. I haven't used my logic analyzer
> yet, mainly because it's used more useful in troubleshooting code than
> troubleshotting hardware. I just prefer to use my o-scope and signature
> analyzer.
>
> Maybe someone with more knowledge and experience here can add something
> about logic analyzers.
>
> Matt
>
> > -----Original Message-----
> > From: techtoolslist-bounces@flippers.com [mailto:techtoolslist-
> > bounces@flippers.com] On Behalf Of Adam Courchesne
> > Sent: Tuesday, April 12, 2005 6:53 AM
> > To: Technical Tools Mail List
> > Subject: Re: [Techtoolslist] Logic Analyser adevice needed
> >
> > You lost me here... put game ROMS into the 1241???
> >
> >
> > On Apr 11, 2005 2:44 PM, Matthew Rossiter <matt@verio.net> wrote:
> > >
> > >
> > >
> > > Here is some training material on the older tektronix logic analyzers.
> > Cool
> > > 80's videos. :)
> > >
> > >
> > >
> > > http://games.rossiters.com/test-equipment/
> > >
> > >
> > >
> > > I think most gamers have been getting the Tektronix 1241 model.
> > Probably
> > > because they're not that expensive and if you ask
> > >
> > > around it's not that difficult to get the roms for the mnemonics rom
> > packs.
> > > I believe you just need to find any rom pack and
> > >
> > > just swap the desired (6502, z80, etc) 27128 roms into them. It's also
> > easy
> > > to find the manuals for this model. I have another
> > >
> > > training manual that I need to scan in and put online.
> > >
> > >
> > >
> > > Matt
> > >
> > >
> > >
> > >
> > > ________________________________
> > >
> > >
> > > From: techtoolslist-bounces@flippers.com
> > > [mailto:techtoolslist-bounces@flippers.com] On Behalf Of
> > > pc2jamma
> > > Sent: Monday, April 11, 2005 8:54 AM
> > > To: Techtoolslist
> > > Subject: [Techtoolslist] Logic Analyser adevice needed
> > >
> > >
> > >
> > >
> > >
> > >
> > > Hello guys !
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > I'm wondering to buy one Logic Analyzer... but I'd never use one before,
> > and
> > > I don't know somebody that can help me on choose one or even to tell me
> > how
> > > to turn it on ;) - but I have one idea about it's functionality.
> > >
> > >
> > >
> > >
> > >
> > > I have some experience on Scope - I learned by my self how to operate
> > one...
> > >
> > >
> > >
> > >
> > >
> > > My question is... what I have to see or check before buy one ? Do you
> > guys
> > > have some model to recommend ? I've check on Ebay, and they have dozens
> > of
> > > them, with starting price as low as $ 100.
> > >
> > >
> > >
> > >
> > >
> > > I'm planning to use it on help me to fix my arcade boards... Is it
> > useful
> > > for that ?
> > >
> > >
> > >
> > >
> > >
> > > Thank you very much, and my apologize for too many questions...
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > Josˇ Luiz Martins
> > > _______________________________________________
> > > Techtoolslist mailing list
> > > Techtoolslist@flippers.com
> > > http://seven.pairlist.net/mailman/listinfo/techtoolslist
> > >
> > >
> > >
> > _______________________________________________
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> > Techtoolslist@flippers.com
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>
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Received on Tue Apr 12 11:56:01 2005