Tracing old 68K code

On Wed, 01 Sep 2010 12:17:21 +0200, Fred Bartoli <" "> wrote:

Robert Baer a écrit :
Fred Bartoli wrote:
Well, not exactly.

I'm consulted for an odd thing.
The customer have an old complex 68K based analog system that's
developing a weirdo bug in the analog section.

I'll be given the schematics and partly reversed SW, but I anticipate
I'll need to have some control over the up and will need to have some
bk points, do some stepping since interactions between the logic and
analog parts are rather complex...

Now, all I have is a 16900A logic analyzer with some 16741A data
acquisition boards that's never been fired so I don't know the
capabilities.

Anyone knowing if it's possible to make it not only scope and store
the busses activity, but also interact with the uP, like emulating an
(OK rather crude) in-situ emulator or something? Maybe at the expense
of an additional board...

Or suggestions for some other cheap solution...


Try something "weird" like (linear) mapping (of) RAM to a video display..

???

AKA as the video card trick.

Another technique is a pair of DAC one for address and one for data to
drive a scope in the XY mode. Does anybody know of a DSO that does XY
mode?

"JosephKK"<quiettechblue_at_yahoo.com> wrote:

On Wed, 01 Sep 2010 12:17:21 +0200, Fred Bartoli <" "> wrote:

Robert Baer a ?it :
Fred Bartoli wrote:
Well, not exactly.

I'm consulted for an odd thing.
The customer have an old complex 68K based analog system that's
developing a weirdo bug in the analog section.

I'll be given the schematics and partly reversed SW, but I anticipate
I'll need to have some control over the up and will need to have some
bk points, do some stepping since interactions between the logic and
analog parts are rather complex...

Now, all I have is a 16900A logic analyzer with some 16741A data
acquisition boards that's never been fired so I don't know the
capabilities.

Anyone knowing if it's possible to make it not only scope and store
the busses activity, but also interact with the uP, like emulating an
(OK rather crude) in-situ emulator or something? Maybe at the expense
of an additional board...

Or suggestions for some other cheap solution...


Try something "weird" like (linear) mapping (of) RAM to a video display..

???

AKA as the video card trick.

Another technique is a pair of DAC one for address and one for data to
drive a scope in the XY mode. Does anybody know of a DSO that does XY
mode?

Doesn't every DSO do that? I never came across a DSO that can't do XY
mode.

On Sat, 04 Sep 2010 19:33:53 GMT, nico_at_puntnl.niks (Nico Coesel)
wrote:

"JosephKK"<quiettechblue_at_yahoo.com> wrote:

On Wed, 01 Sep 2010 12:17:21 +0200, Fred Bartoli <" "> wrote:

Robert Baer a ?it :
Fred Bartoli wrote:
Well, not exactly.

I'm consulted for an odd thing.
The customer have an old complex 68K based analog system that's
developing a weirdo bug in the analog section.

I'll be given the schematics and partly reversed SW, but I anticipate
I'll need to have some control over the up and will need to have some
bk points, do some stepping since interactions between the logic and
analog parts are rather complex...

Now, all I have is a 16900A logic analyzer with some 16741A data
acquisition boards that's never been fired so I don't know the
capabilities.

Anyone knowing if it's possible to make it not only scope and store
the busses activity, but also interact with the uP, like emulating an
(OK rather crude) in-situ emulator or something? Maybe at the expense
of an additional board...

Or suggestions for some other cheap solution...


Try something "weird" like (linear) mapping (of) RAM to a video display..

???

AKA as the video card trick.

Another technique is a pair of DAC one for address and one for data to
drive a scope in the XY mode. Does anybody know of a DSO that does XY
mode?

Doesn't every DSO do that? I never came across a DSO that can't do XY
mode.

Lemme see if i can get my TDS544A to do it. Maybe i really need a
nice Instek or Rigol?

"JosephKK"<quiettechblue_at_yahoo.com> wrote:

On Sat, 04 Sep 2010 19:33:53 GMT, nico_at_puntnl.niks (Nico Coesel)
wrote:

"JosephKK"<quiettechblue_at_yahoo.com> wrote:

On Wed, 01 Sep 2010 12:17:21 +0200, Fred Bartoli <" "> wrote:

Robert Baer a ?it :
Fred Bartoli wrote:
Well, not exactly.

I'm consulted for an odd thing.
The customer have an old complex 68K based analog system that's
developing a weirdo bug in the analog section.

I'll be given the schematics and partly reversed SW, but I anticipate
I'll need to have some control over the up and will need to have some
bk points, do some stepping since interactions between the logic and
analog parts are rather complex...

Now, all I have is a 16900A logic analyzer with some 16741A data
acquisition boards that's never been fired so I don't know the
capabilities.

Anyone knowing if it's possible to make it not only scope and store
the busses activity, but also interact with the uP, like emulating an
(OK rather crude) in-situ emulator or something? Maybe at the expense
of an additional board...

Or suggestions for some other cheap solution...


Try something "weird" like (linear) mapping (of) RAM to a video display..

???

AKA as the video card trick.

Another technique is a pair of DAC one for address and one for data to
drive a scope in the XY mode. Does anybody know of a DSO that does XY
mode?

Doesn't every DSO do that? I never came across a DSO that can't do XY
mode.

Lemme see if i can get my TDS544A to do it. Maybe i really need a
nice Instek or Rigol?

I have a TDS510A and it can do XY for sure. According to the TDS510
manual you must press Display -> format (bottom menu) and select XY
mode from the side menu.