25 Feb
2007
25 Feb
'07
4:20 p.m.
Tony Duell wrote:
Is this docuemtned anywhere? I can't see it in the
9872 operating/service
manual, but as I said I've not seen the 98130 (9815 plotter interface)
manual.
Not that I have seen.
Tony Duell wrote:
HPIB-style, but not HPIB!. It may use the HPIB lavels,
it may use the
same 3 wire handshake, but it's not HPIB if it changes direction like
that without any commands fromt he controller. That's what confused me.
You kept on insisting it was HPIB, I still claim that, strictly, it can't be.
Brent wrote: plotter HP-IB port that does just the data transfer
(minus all the HP-IB device selection, etc. functions)
Brent wrote: the 8 HPIB data lines and 3 data-handshake lines are brought across
to the controlling machine. It's HPIB minus everything but the data-transfer.
Brent wrote: plotter microproc is distinguishing 9815 vs HPIB and acting appropriately.
Brent wrote: un-addressed talk/listen HPIB-style data transfer.
I never suggested it was HPIB in any sort of strict or complete sense. I said
it did not include the device addressing, which precludes direction selection
via device addressing. I never even raised the issue of direction selection,
you did, but as a declaration not a question. All I said was HPIB data
*transfer*.
Tony Duell wrote:
I know what you've said, but _I_ have a problem
with it.
What you're describing is, I beleive, technically impossible.
Apparently if one comes to a conclusion before you, it's technically impossible.
When you come to the same conclusion a few sentences later it's a brilliant
deduction worthy of elaborate explanation.
I originally asked for HPGL plotter files. You just had to weigh in with your
(unsolicited) expert opinion about the interface. I kept indicating it didn't
seem like a big issue of complexity or concern.
If you were confused or wondering how I thought it worked you should have
asked a question. Instead you kept making declarative statements, many of which
strayed well away from anything I had expressed any concern over. It was all about
Tony's expert opinion and advice.
Get over yourself.