Re: Fwd: Interactive postscript from HP printer...

At 09:24 22/06/2015 +0100, Ken Sharp wrote:


>This maybe a little off topic from Ghostscript development per se

It is off-topic, yes, I'd suggest you try Stack Overflow instead for a 
wider range of respondents.


>The printer understands postscript but I'd like to look at the stack and 
>debug interactively. It seems like the interactivity (echo and executive 
>output to stdio) is turned off.
>When I connect with a terminal window to the printer I get no echo and no 
>output (in response to a pstack command for example).
>Are there some PS commands I need to execute to see the executive stdio or 
>is this a PJL command ?

In general you cannot reliably go interactive with a printer, many 
implementations simply don't allow it (bear in mind that early PostScript 
printers used a uni-directional parallel printer interface). While it is 
possible with some printers I can attest from painful personal experience 
that in general you get nothing back from a printer.

So most likely you cannot do what you want with the HP printer, if it can 
be done, only the manufacturer can tell you how.

Your best bet is to use Ghostscript to develop the PostScript and send it 
to the printer for verification as required.

If that's not good enough then you will probably  have to resort to 
actually printing stuff out on paper.



                     Ken