🚀 go-pugleaf

In article 22690@adobe.com, zisk@adobe.com (Stephen Zisk) writes:
>In article <justin.726213640@tasman>, justin@tasman.cc.utas.edu.au
>(Justin Ridge) wrote:
>> Is it possible to cancel a job which is being processed in a PS
>> printer - specifically, in a Apple LaserWriter IINT/NTX/f/g?
>
>For any PostScript printer data stream there is an "interrupt" command.
>On serial and parallel streams, emit a ^C character. On Appletalk, I
>do not know the command, but you could look it up in Inside Appletalk.
>The effect of the command depends on the state of the printer job.
>
..
>
>If the cancel was received before end-of-job, the behavior is much
>more complex. Typically, it will be processed when the interpreter
>next looks for input. This may occur ahead of characters received
>earlier, due to buffer scanning. The interrupt will generate a
>PostScript interrupt error, causing execution of the interrupt procedure
>in errordict. This will typically cause an error message to be printed
>and the rest of the job to be flushed.
>

And after? what happens?
On Apple printers, nothing special happens, the next job is printed

ON HP 3Si (at least in rev 400), the printer HALTS!!! Yes, it stops
working, you have to shut off the power to restart it! For me it is
really incredible: remember that the 3Si is a heavy duty printer 
(16ppm, 50000 copies/month)! But for HP it seems OK...

When you know that CTRL-C is sent by TranScript when you lprm (remove
job) from the queue the job being printing, you can imagine the
disaster for other users...

PS: i have recently received rev 300 printers but not yet tested if 
they behave in the same manner.

PPS: HP3Si are based on Adobe PostScript.

>
>Stephen Zisk (zisk@adobe.com)  Disclaimer: These are my personal views
>Adobe Systems Incorporated     and do not represent the position of
>Eastern Regional Office        Adobe Systems Incorporated.
>24 New England Exec. Park
>Burlington, MA 01803           They pay me but they don't muzzle me!


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