[Simh] [SimH] Networking support

[Johnny Billquist]

On 2016-03-12 20:36, Bill Cunningham wrote:
> What I meant was that I remember on early PCs using an rs232-c line for
> using the old BBSes and compuserve before it was an ISP. 10 cents a
> minute. I had several modems 300, 1200 and 2400 baud modems.

Oh, certainly. RS-232 connections were used for that a lot too.

>      These even older machines may have had hookups within a company.
> Even one building connecting 5 or so machines. Serial would've worked
> fine. And was what was used. I was thinking with maybe 4-5 PDP8s a
> company would use some kind of networking. Perhaps not back then. I was
> only aware of pdp11 and vax being "network possible". I guess I was wrong.

Well, if we talk networking as in using some protocol to communicate 
between machines, there have been plenty of different technologies. 
RS-232 is one obvious one. There have also been others. The point is, 
networking itself is a software thing. You need some kind of connection 
between the machines, which can carry bits. But everything beyond that 
is software.

	Johnny

> Bill
>
>     ----- Original Message -----
>     *From:* Clem Cole <mailto:clemc at ccc.com>
>     *To:* Anders Magnusson <mailto:ragge at ludd.ltu.se>
>     *Cc:* SIMH <mailto:simh at trailing-edge.com> ; Bob Supnik
>     <mailto:bob at supnik.org>
>     *Sent:* Saturday, March 12, 2016 2:24 PM
>     *Subject:* Re: [Simh] [SimH] Networking support
>
>
>     On Sat, Mar 12, 2016 at 12:25 PM, Anders Magnusson
>     <ragge at ludd.ltu.se <mailto:ragge at ludd.ltu.se>> wrote:
>
>         DG-UX or MV/UX?
>
>     ​Which was the rewrite of System V ?? i.e. System V cmd system, but
>     internally developed System V SMP kernel -- I want to say DG-UX
>     maybe; but I'd been a long time and many beers ago - I've forgotten
>     the name.   I remember it was a very clean UNIX implementation.
>     Nice locking structure, easy to debug, etc...
>
>     Locus was working on different projects with Ultrix, Tru64, VMS,
>     AIX, SunOS, Solaris, HP-UX, Apollo, DG's UX, some work for Pr1me,
>     ISC's 386/ix, Intel's 386 port, SVR4 for the AT&T/UI guys, and
>     Intel's Paragon at the same time.  At one point, I had the OS
>     release schedules for HP, DEC and Sun all pasted on the wall behind
>     my desk.  I used to say LCC got to see everyone's dirty laundry in
>     those days.  As I said, I do remember the DG Unix re-implementation
>     was very easy to work on (I will not say which one we cursed the most).
>
>
>         The DG ethernet card has a 82586 on board.
>
>     ​As I said, many beers ago. I'm undoubtedly mixed up a couple of the
>     systems, since we had so many we worked with in those days.  I
>     remember the AMD chip was a lot easier to program than the Intel
>     device. That said, I suspect that I have the docs on the Intel chips
>     somewhere, but it sounds like others have the DG docs which are
>     going to be better for simh purposes.
>
>     ​Clem​
>
>
>     ------------------------------------------------------------------------
>
>     _______________________________________________
>     Simh mailing list
>     Simh at trailing-edge.com
>     http://mailman.trailing-edge.com/mailman/listinfo/simh
>
>
>
> _______________________________________________
> Simh mailing list
> Simh at trailing-edge.com
> http://mailman.trailing-edge.com/mailman/listinfo/simh
>


-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol