Fwd: [simh] Announcing the Open SIMH project

onderful resource for anyone to use as we continue to evolve the technology provided by the SIMH system. The SIMH Steering Group Clem Cole Richard Cornwell Paul Koning Timothe Litt Seth Morabito Bob Supnik ᐧ

Re: [Simh] Fwd: VAX + Spectre

ix might look like. > > I'm reasonably comfortable assuming that the somewhat-related "Meltdown" > vulnerability doesn't show up in VAX, because that issue requires a > designer who'd implement page access checking in a way I would not expect a > DEC engineer to do. > >

Re: [Simh] Fwd: VAX + Spectre

Paul - be careful. All CPU's post the IBM AGS that used branch prediction are suspect. Russ Robelen (who was the 360/50 lead, worked on 360/90 and lead AGS) has the speculative executing patent. I tweaked him when it all came out and said - look at what you did. What Russ and team are great

Re: TK50, was: Re: [TUHS] Ultrix Tape: Block Size?

I took most of this off line, but I'll try to close down the discussion, so we can get back to TUHS history. Please be careful of your wording as it is easy to get confused particularly if you never used the original 1/2" tape system you might not understand the actual terms. The term for

Re: [TUHS] Ultrix Tape: Block Size?

ape II was the serial driven TU58. > The TK50 was CompacTape or something like that. It was the predecessor of > a number of square tapes... > > See DLT on Wikipedia https://en.m.wikipedia.org/wiki/Digital_Linear_Tape > > Bill > > -Original Message- > From: Paul W

Re: [TUHS] Ultrix Tape: Block Size?

On Tue, Oct 16, 2018 at 12:57 PM Paul Winalski wrote: > The block size is almost certainly 512 bytes. > Which is what I said - the block siize is set by the HW. But ... the issue is trying to get the TK-50 to stream. Hence the traditional unix: dd ibs=64K obs=XXX | tar xvfp - trick. This will

Re: [TUHS] Ultrix Tape: Block Size?

#$%^ - they >>weren't<< like DECtape from a reliability standpoint ... ᐧ On Mon, Oct 15, 2018 at 5:00 PM Clem Cole wrote: > Be careful, TK-50 is different than 9-track. It's a streamer tape like > QIC, 4mm and 8mm. The blocking is done under the covers by the HW and the &g

Re: [TUHS] Ultrix Tape: Block Size?

Be careful, TK-50 is different than 9-track. It's a streamer tape like QIC, 4mm and 8mm. The blocking is done under the covers by the HW and the blovk size if just how a DMA is done. I recommend that you pre-fetch the read with dd or double-dd setting ibs=64k, obs=20b and conv=sync and pipe

Re: [TUHS] VTServer/etc for V6 Unix

On Tue, Oct 25, 2016 at 10:16 AM, Noel Chiappa wrote: > Is there any interest in all this? If so, I can put together a web page > with > the V6-verion VTServer source, along with the modified V6 serial line stuff > (including a short description of the extended

Re: cctech Digest, Vol 15, Issue 25

​below...​ On Fri, Sep 25, 2015 at 1:00 PM, wrote: > - Forwarded message -- > From: Chuck Guzis > > http://www.eah-jena.de/~kleine/history/languages/ansi-x3dot9 > -1966-Fortran66.pdf > > The surprising thing is how spare the ANSI

Re: cctech Digest, Vol 14, Issue 10

On Mon, Aug 10, 2015 at 1:00 PM, cctech-requ...@classiccmp.org wrote: From: Brent Hilpert hilp...@cs.ubc.ca There was also AlgolW, supported on MTS. As MTS was being mentioned earlier I was going to ask if anyone knew whether the AlgolW compiler was included in the available distribution.