In this hardware emulator they have to emulate a network card, other than
that all the DTC stuff is software, and causes them no extra work. You get
it when you load MPE on the hardware emulator by default. The DTC is not
hp3000 system hardware, it's an external device connected through the
network, ie software.
"David T Darnell" <[log in to unmask]> wrote in message
news:a3mdtr01rdo@enews2.newsguy.com...
> Jan,
>
> I stated that DTCs are less important because (I assumed) there are so
many
> ways to work around them.
>
> If there is a DTC implementation that cannot be worked around with some
> other hardware or software solution, it's probably important to speak up
> about it.
>
> -dtd
>
>
>
>
>
>
> Jan Gerrit Kootstra <[log in to unmask]>@RAVEN.UTC.EDU> on
> 02/03/2002 11:02:29 PM
>
> Please respond to Jan Gerrit Kootstra <[log in to unmask]>
>
> Sent by: HP-3000 Systems Discussion <[log in to unmask]>
>
>
> To: [log in to unmask]
> cc:
> Subject: Re: [HP3000-L] MPE emulator
>
>
> David,
>
>
> Why are DTC's less important?
>
> David T Darnell wrote:
>
> > I'm no Computer Scientist, but I did get a four year degree in CS from a
> > real University.
> >
> > Seems like a hardware emulation could be superior to an OS emulator in
> many
> > ways, but I have the following questions or comments:
> >
> > 1) Would hardware emulation take more processing power than an OS
> emulator?
> >
> > 2) Does your VAX emulator provide bridges or gateways to the native OS
or
> > hardware? (Is such even desireable?)
> >
> > 3) For MPE to run directly (ie. loaded directly from HP tapes) wouldn't
> you
> > have to emulate the entire HP3000 architecture?
> >
> > 4) Could you emulate multiprocessor 3K hardware config (or, would you
> need
> > to?)
> >
> > 5) Seems that if you implement a truely portable HP3K hardware
> > implementation, as more modern host hardware becomes available, you
could
> > end up with a more powerful MPE box than you could ever have with real
3K
> > hardware - cheaper too!
> >
> > 6) How much would we be restricted to peripherals and storage that are
> > compatable with a real HP3K, and how much could we use non-3K components
> > (ie. tape drives, DASD, NICs, DTCs[less important]?
> >
> > Thanks,
> >
> > Dave Darnell
> >
> > Robert Boers <[log in to unmask]>@RAVEN.UTC.EDU> on 02/03/2002
> > 02:02:19 AM
> >
> > Please respond to Robert Boers <[log in to unmask]>
> >
> > Sent by: HP-3000 Systems Discussion <[log in to unmask]>
> >
> > To: [log in to unmask]
> > cc:
> > Subject: Re: [HP3000-L] MPE emulator
> >
> > It is correct that we did not get much response about my note about
> > hardware
> > emulation. Possibly because our experience with the VAX and PDP-11
> > emulators
> > is that the concept is often confused with Operating System emulation,
> and
> > the assumption is that recompiling would be necessary or that not all
> > applications will run.
> >
> > The hardware emulators we build are operating system independent. The
> demo
> > we use to show the concept is to unplug a SCSI system disk from a VAX,
> plug
> > it into a SCSI port of a PC and boot VMS (or another VAX operating
> system)
> > from it. We do not need to convert the binary VAX code in any way or
> form.
> > Performance is not an issue, we have reached VAX 7000 Dhrystone
> performance
> > on a PC.
> >
> > The emulator engine we use is likely flexible enough for the HP3000
> > hardware
> > (we use the same for PDP-11 and VAX). The core VAX emulator prototype
> (CPU,
> > memory, disks) took less than 4 months to develop.
> >
> > It took us about a year to convince Compaq to support their software on
> our
> > VAX emulator as any other VAX. We did that by passing their VAX hardware
> > diagnostics and architecture tests. They now offer very reasonably
priced
> > VMS transfer licenses
> > http://www.openvms.compaq.com/openvms/sri-charon-vax-emulator.html
> >
> > Robert Boers
> > CEO Software Resources International
> >
> > "Jerry Leslie" <[log in to unmask]> wrote in message
> > news:a3eo96$ki9$2@joe.rice.edu...
> > > Wyell Grunwald ([log in to unmask]) wrote:
> > > : PDP machines and VAX machines have an emulator out there that runs
> > > : on Windows 2000. This seems like a great idea for MPE ! How come
> > > : there is not more excitement about this ? See:
> > > : http://www.softresint.com/
> > >
> > > Dunno, a gentleman from SRI posted an article about their emulation
> > > technology a few weeks ago, but didn't get much response.
> > >
> > > --Jerry Leslie (my opinions are strictly my own)
> >
> > * To join/leave the list, search archives, change list settings, *
> > * etc., please visit http://raven.utc.edu/archives/hp3000-l.html *
> >
> > * To join/leave the list, search archives, change list settings, *
> > * etc., please visit http://raven.utc.edu/archives/hp3000-l.html *
>
> --
> Regards,
>
> Jan Gerrit Kootstra
> System Engineer
> PinkRoccade Online BV
> PhD Student CFD and Numerical Math
> University of Groningen (RuG)
> [These opinions and remarks are my own, and may not reflect policies of
> PinkRoccade or RuG.]
>
> * To join/leave the list, search archives, change list settings, *
> * etc., please visit http://raven.utc.edu/archives/hp3000-l.html *
>
> * To join/leave the list, search archives, change list settings, *
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>
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