Quite right Johnny. I obviously was not clear about the problem. Essentially, when trying to read a tape file using a simulated TE16 tape drive (on a simulated VAX 780 running VMS 3.0), I get CRC errors, yet when I try to read the same tape file with a simulated TS11 tape drive, it works perfectly. My question is - is there any explanation for this different behaviour?
Peter Allan On 5 November 2017 at 17:00, <[email protected]> wrote: > Send Simh mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://mailman.trailing-edge.com/mailman/listinfo/simh > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Simh digest..." > > > Today's Topics: > > 1. Re: VMS 1.5 installable? (Johnny Billquist) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sun, 5 Nov 2017 12:55:16 +0100 > From: Johnny Billquist <[email protected]> > To: [email protected] > Subject: Re: [Simh] VMS 1.5 installable? > Message-ID: <[email protected]> > Content-Type: text/plain; charset=utf-8; format=flowed > > Well, obviously there are differences. The TE16 is a Massbus tape drive. > The TS11 is a Unibus thing. Totally different. Both in how they connect, > how the programming model is, the exact layout of registers, and of > course then, through which bus interface you program them. > > In essence, they have nothing in common, apart from that they both use > the same physical tape medium in real life. > > Johnny > > On 2017-11-05 11:39, Peter Allan wrote: > > Thanks to Wilm, I now have VMS 1.5 up and running. This is new territory > > for me since my first exposure to VAXen was in late 1982 when the > > version was something like 3.0, or just possibly the last version of > > 2.x. (I didn't pay attention to such things back then. If I could write > > Fortran programs, I was happy.) > > > > However, the fact that I could complete the installation of VMS 3.0 by > > using a simulated TS11 tape drive when it failed with a TE16 drive has > > got me wondering if there is a bug in simh. Surely on a real system you > > could use a real TS11 or TE16 drive? Obviously there is no density on a > > simulated tape file, but is there any other difference between the two > > simulated tape drives that explains what is going on? > > > > Cheers > > > > Peter Allan > > > > > > On 25 October 2017 at 14:08, Peter Allan <[email protected] > > <mailto:[email protected]>> wrote: > > > > Thanks Wilm, I will try that out. I doubt I would have thought of > > using a TS11 rather than a TE16 without your advice. > > > > Peter > > > > On 25 October 2017 at 12:39, Wilm Boerhout <[email protected] > > <mailto:[email protected]>> wrote: > > > > Your approach is correct, I have regularly used it over the past > > weeks to bring up VMS 1.0. > > > > I also saw these CRC errors on restore sometimes. There are two > > ways around this: > > > > 1. Mount the 3.0 tape on a generic (newer) VAX/VMS system, use > > $MOUNT/OVER=ID and copy the LIBRARY and OPTIONAL savesets to > a > > (RP06-sized) disk in the [0,0] directory. In a later step, $ > > mount > > /foreign this disk, and point the installer to this disk as > > the source. > > 2. On your 3.0 system just booted with just the REQUIRED > > saveset, use a > > TS11 and not a TE16 tape unit in the simh config. Somehow > this > > worked. Also, when you use a TE16, use an explicit $MOU/FOR > > /DEN=800. I forget in which version, but this also worked > > sometimes. > > > > HTH > > > > /Wilm > > > > > > Peter Allan schreef op 25-10-2017 om 13:30: > > > > Encouraged by all of the posting about running VMS 1.5 on an > > emulated VAX 780 with simh, I have tried to do the same. > > However, I am having a problem. > > > > I don't have an existing VMS 3.x system running (4.6 is my > > earliest), so I tried to do a VMS 3.0 installation using the > > tape from uni-stuttgart which I had downloaded some time ago. > > > > I booted a VMS 4.6 system on an emulated 780 and did an > > image restore using BACKUP of the REQUIRED saveset on the > > VMS 3.0 installation tape to an RP06. So far, so good. Then > > I booted the newly created RP06 disk, which continued the > > installation process by attempting to restore the LIBRARY > > saveset on the VMS 3.0 tape. However, this crashed with too > > many CRC errors. > > > > This is where I am stuck. I could download the tape from > > uni-stuttgart again, but is there any reason to expect a > > better result by doing this? Can someone who has got this to > > work advise me what to try next please. I have downloaded > > the files that Christian posted, but while that has > > standalone backup on a disk image, I need DSC to read the > > VMS 1.5 tape (don't I?) which is the only reason that I was > > trying to get VMS 3.0 working in the first place. > > > > Cheers > > > > Peter Allan > > > > On 20 October 2017 at 09:43, Wilm Boerhout > > <[email protected] <mailto:[email protected]> > > <mailto:[email protected] <mailto:[email protected]>>> > > wrote: > > > > Matt Burke schreef op 17-10-2017 om 23:17: > > > > You may also want to try VAX/VMS 1.0 (or as close > > as you can > > get to it): > > > > > > http://www.9track.net/vms/BB-D782A-BE.zip > > <http://www.9track.net/vms/BB-D782A-BE.zip> > > <http://www.9track.net/vms/BB-D782A-BE.zip > > <http://www.9track.net/vms/BB-D782A-BE.zip>> > > > > This is not taken from an original tape. It's > > something I > > reconstructed > > from a disk containing early VAX/VMS source and > > binaries. The > > dates > > indicate that this is earlier than VAX/VMS 1.5. > > Hopefully someone can find an original at some > point. > > > > Matt > > _______________________________________________ > > Simh mailing list > > [email protected] <mailto:[email protected]> > > <mailto:[email protected] <mailto: > [email protected]>> > > http://mailman.trailing-edge.com/mailman/listinfo/simh > > <http://mailman.trailing-edge.com/mailman/listinfo/simh> > > > > <http://mailman.trailing-edge.com/mailman/listinfo/simh > > <http://mailman.trailing-edge.com/mailman/listinfo/simh>> > > > > > > Wonderful! > > > > > > I now have VMS 1.0 up and running on simh VAX780. Does > > anyone know > > whereto find the Fortran installation tape for this > system? > > > > > > BTW, I also use a fine VT52 emulator I found on github. > > > > > > /Wilm > > > > > > _______________________________________________ > > Simh mailing list > > [email protected] <mailto:[email protected]> > > <mailto:[email protected] <mailto: > [email protected]>> > > http://mailman.trailing-edge.com/mailman/listinfo/simh > > <http://mailman.trailing-edge.com/mailman/listinfo/simh> > > <http://mailman.trailing-edge.com/mailman/listinfo/simh > > <http://mailman.trailing-edge.com/mailman/listinfo/simh>> > > > > > > > > > > _______________________________________________ > > Simh mailing list > > [email protected] <mailto:[email protected]> > > http://mailman.trailing-edge.com/mailman/listinfo/simh > > <http://mailman.trailing-edge.com/mailman/listinfo/simh> > > > > > > > > _______________________________________________ > > Simh mailing list > > [email protected] <mailto:[email protected]> > > http://mailman.trailing-edge.com/mailman/listinfo/simh > > <http://mailman.trailing-edge.com/mailman/listinfo/simh> > > > > > > > > > > > > _______________________________________________ > > Simh mailing list > > [email protected] > > http://mailman.trailing-edge.com/mailman/listinfo/simh > > > > -- > Johnny Billquist || "I'm on a bus > || on a psychedelic trip > email: [email protected] || Reading murder books > pdp is alive! || tryin' to stay hip" - B. Idol > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > Simh mailing list > [email protected] > http://mailman.trailing-edge.com/mailman/listinfo/simh > > ------------------------------ > > End of Simh Digest, Vol 166, Issue 12 > ************************************* >
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