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, [email protected] wrote:
----------------------------------------------------------------------
Message: 1
Date: Sun, 05 Dec 2010 19:50:07 +0100
From: J?rg Hoppe<[email protected]>
To: [email protected]
Subject: Re: [Simh] SimH: Bugfix in VAX/PDP11 TK50 driver ... more
facts
Message-ID:<[email protected]>
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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