16 Sep
2004
16 Sep
'04
3:23 p.m.
>>>> "Ashley" == Ashley Carder
<wacarder(a)usit.net> writes:
Ashley> ----- Original Message ----- From: "Ron Hudson"
Ashley> <ron.hudson(a)sbcglobal.net> To: "General Discussion: On-Topic
Ashley> and Off-Topic Posts" <cctalk(a)classiccmp.org> Sent: Thursday,
Ashley> September 16, 2004 4:01 PM Subject: Re: RSTS/E Question
> > Ron> In a real PDP11 you would have actual
terminals/ttys
> connected > Ron> to physical serial ports. In my case I have
> Telnet > Ron> sessions..but I don't know how many I can have.. I
> suppose one > Ron> for each job (20 or so?) or does the DZ11 limit
> the number of > Ron> KBn: s I can have?
> >
> > It sure does. If it's a DZ (whether real, or emulated one tied
> to a > Telnet session at the emulator) it by definition has 8
> ports.
> >
> > If you want 20 sessions, and they are hooked to DZs, then you'd
> have > to have at least 3 DZs...
> >
> > paul
> >
> >
> Hmm.. In the simulator, I type show dz
>
> DZ, address=17760100-17760137*, vector=300-334, lines=32, attached
> to 232, 8b, 0 connections
>
> Does this mean I have 32 KBn: (KB0 - KB31??)
Ashley> The console is KB0: and it does not use a DZ11 line. I
Ashley> believe that any configured pseudo keyboards would use the
Ashley> next numbers in the series PK1:, PK2:, for example. ...
The order is: KL/DL11-A; DL11-C/D; DL11-E; PK; DJ11; DH11; DZ11.
Note that PKn: is the controlling end of a pseudo keyboard. If you
asked for two, then the controlling end is PK0 and PK1, which control
respectively KB1 and KB2 (assuming your only single-line interface is
the console). Writing to PK0 is "typing" on KB1.
By the way, Linux has the same concept -- "pty". The "master pty"
is
the PKn:, the "slave pty" is the matching KBm:.
The standard use for PKs is batch jobs and network terminal sessions.
paul