LOL - very true, Clem. That was a shameless bit of self-promotion. From 
what I can tell, SIMH does not support a DH11. Yet.

But when is an emulated interrupt a bad thing? Except for the idle loop 
that may or may not be optimized, the rest is balls-to-the-wall CPU 
bound anyway. And these days, even emulated, we're orders of magnitude 
faster than the original hardware.

http://simh.trailing-edge.narkive.com/Sc9HBFZU/multiple-telnet-ports-in-simh-to-rsts-e-9-6

I recognize a familiar name in there ;)

But yeah, when a DZ11 was blazing away at 19200 baud (I hacked the 
TOPS-10 6.03A we had at LIRICS to support it), it made the system crawl.

Back to our regularly scheduled programming...

On 8/29/2018 3:30 PM, Clem Cole wrote:
> Right but for goodness sake, try to make a DH11 work; not a DZ11!!!  
>  Real DZ11'S were SW pigs and consumed a measurable percentage of a 
> vax, particularly when running uucico(8) (they are interrupt crazy).  
>  It is one of the reasons why the Unix community in those days always 
> recommended Able DH/DMs on Vaxen.
>
> Clem
> ᐧ
>
> On Wed, Aug 29, 2018 at 2:57 PM Arthur Krewat <krewat@kilonet.net 
> <mailto:krewat@kilonet.net>> wrote:
>
>     Ala DZ11 support in the KS10 emulator of SIMH ;)
>
>
>
>     On 8/29/2018 2:50 PM, Clem Cole wrote:
>>
>>
>>     We can take this off line.   As I said, it been done a numberof
>>     times with simh and the like.   The key is that simh creates a
>>     'serial line' on a TCP port. You tell UNIX to hang a login off it
>>     and then you telnet or whatever to that port.    The older system
>>     running in simh, thinks it has a serial line.   It pretty much
>>     just works; al biet is slow as hell and chews up a ton of resources.
>