[Simh] Ultrix TK50

[Rob Jarratt]

I have had problems similar problems. My records on this are not entirely
clear. Possibly it was with the VAX emulator trying to install VMS 3.0 from
a virtual tape of BB-D782E-BE. In that case I know I could not use the TQ
simulation and had to use the TS emulation instead. But that could be
because the TK50 came out after 3.0, I really can't remember now. I do
remember though getting some sort of bad tape error which you would not
expect to get from a virtual tape, whether that was with the 3.0 tape or
something else though I am not entirely sure, sorry if that is not a lot of
help.

Regards

Rob

> -----Original Message-----
> From: simh-bounces at trailing-edge.com [mailto:simh-bounces at trailing-
> edge.com] On Behalf Of Bob Supnik
> Sent: 06 December 2010 21:26
> To: simh at trailing-edge.com
> Subject: Re: [Simh] Ultrix TK50
> 
> There's clearly some sort of problem.  I would like to know whether this
is a
> general problem with magtapes under Ultrix (V3 or V4), just TMSCP tapes,
or
> just with the TK50?  So:
> 
> 1. Will Ultrix install from the 3.0 tape if the simulated tape is a
> TSV11 (different tape)? a TK70 or TU81 (different TMSCP)?
> 2. Will Ultrix read the 3.0 if the simulated tape is a TSV11 (different
tape)? a
> TK70 or TU81 (different TMSCP)?
> 
> I think the next step would be to extract the sources for the Ultrix
drivers (V3
> and V4) and take a look at them.
> 
> /Bob
> 
> On 12/6/2010 12:00 PM, simh-request at trailing-edge.com wrote:
> > ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Sun, 05 Dec 2010 19:50:07 +0100
> > From: J?rg Hoppe<j_hoppe at t-online.de>
> > To: simh at trailing-edge.com
> > Subject: Re: [Simh] SimH: Bugfix in VAX/PDP11 TK50 driver ... more
> > 	facts
> > Message-ID:<4CFBDEDF.2070001 at t-online.de>
> > Content-Type: text/plain; charset="iso-8859-15"; Format="flowed"
> > <snip>
> > Thanks for that TMSCP doc!
> >
> > I spent the day testing some combinations of SimH/tape image/Ultrix
version.
> > - SimH: original V3.8-1 vs. my "JH-path" version
> > - Ultrix installation: v3.0 vs. v4.0
> > - Test tapes:
> >           TAPE1 =   www.bitsavers.org/bits/DEC/vax/ultrix/3.0/Ultrix-
> 32_3.0_unsupp.tap
> >           TAPE2 =  "DEC C FOR RISC-ULTRIX TK50 (DEC 1991, AQ-PCXFA-BE
> > ME214414).simh_tq.tk50" (own copy, call me)
> >
> > Results:
> > 1) A real uVAX under Ultrix 3.0 can read the real
"Ultrix-32_3.0_unsupp.tap"
> (surprise!)
> >      The controller was QBUS TQK50 (M7546), the drive was TK50.
> > 2) SimH can not read  "Ultrix-32_3.0_unsupp.tap" error free, neither on
Ultrix
> v3 nor on Ultrix v4.
> > 3) The TMSCP driver in Ultrix v4 is apparently different from v3:
> >      The error patterns under SimH are similar, but not the same. Data
loss is
> greater under v4.
> > 4) My little hack (I was so proud of it:-)) is very weak:
> >      - Sure, it makes "Ultrix-32_3.0_unsupp.tap" readable under Ultrix
v3, as
> intended.
> >      - But SimH can not ">>>   boot MUA0" anymore.
> >      - It does not work on Ultrix v4 with "Ultrix-32_3.0_unsupp.tap"
> >      - It does not work with other tapes under Ultrix v3: Tapes with a
small file
> before EOT fail.
> >
> > I attached my test setups&   protocols, if somebody likes to work with
it.
> >
> > How would we continue from here?
> >
> > regards,
> > Joerg
> >
> >
> >
> >
> >
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