30 Aug
2018
30 Aug
'18
2:09 a.m.
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-sim…
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(a)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.