[Simh] single cycle stepping for pdp11

[Doug Snyder]

it would be nice to see the virtual address, physical address, instruction
space/data space flag and data for each cycle

a perfect result would be any data that would be visible and updated each
bus cycle by a blinking light front panel such as a pdp11/70

doug





On Wed, Sep 4, 2013 at 10:38 PM, Mark Pizzolato - Info Comm <
Mark at infocomm.com> wrote:

> OK, so the original hardware supported single cycle stepping.****
>
> ** **
>
> What would expect to happen in the simulator if you stepped single
> cycles?  What details would you want to have access to after stepping at
> the cycle level?****
>
> ** **
>
> *From:* simh-bounces at trailing-edge.com [mailto:
> simh-bounces at trailing-edge.com] *On Behalf Of *Doug Snyder
> *Sent:* Wednesday, September 04, 2013 10:32 PM
> *To:* Mark Pizzolato - Info Comm
> *Cc:* simh at trailing-edge.com
> *Subject:* Re: [Simh] single cycle stepping for pdp11****
>
> ** **
>
> many (if not all) of the pdp11 models support single cycle stepping.  to
> more accurately model an actual pdp11, it would be nice if simh could model
> that feature.  not being able to model that feature is certainly not the
> end of the world, but it is a noticeable difference.****
>
> ** **
>
> doug****
>
> ** **
>
> ** **
>
> On Wed, Sep 4, 2013 at 10:15 PM, Mark Pizzolato - Info Comm <
> Mark at infocomm.com> wrote:****
>
> On Wednesday, September 04, 2013 at 10:08 PM, Doug Snyder wrote:
> > it appears that simh supports single instruction stepping, but not
> single cycle stepping for the pdp11.
>  >
> > if this is the case, have there been attempts or requests to add single
> cycle support?
>
> Hi Doug,
>
> The core behaviors of the simh simulators are built around the execution
> of instructions.  This is the level which things are simulated at.
>
> What problem are you trying to solve or deal with your request to be
> concerned about clock cycles?
>
> - Mark****
>
> ** **
>
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