RSTS/E Question

From: John A. Dundas III <dundas_at_caltech.edu>
Date: Thu Sep 16 15:19:33 2004

At 1:01 PM -0700 9/16/04, Ron Hudson wrote:
>> 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

 From a private conversation with Bob, I know he is not entirely
thrilled with how serial interfaces are implemented within SIMH. I
wrote the VH [DHV/DHQ] driver for SIMH. Look for major overhauls in
both of these in future versions.

>
>DZ, address=17760100-17760137*, vector=300-334, lines=32, attached
>to 232, 8b, 0 connections

Not a very helpful display. But it means that the simulated
_hardware_ is configured for 4 DZs. It does not indicate what RSTS
is 'GEN'd for. Note that the VH display isn't much better:

sim> sho vh
VH, address=17760500-17760577*, vector=340-344, lines=32, 4 units
   VH0, not attached, DHV mode
   VH1, not attached, DHV mode
   VH2, not attached, DHV mode
   VH3, not attached, DHV mode
sim>

But at least it does indicate that there are 4 DHV/DHQs.

>Does this mean I have 32 KBn: (KB0 - KB31??)

Yes.

John
Received on Thu Sep 16 2004 - 15:19:33 BST