[Simh] Serial Console

[Johnny Billquist]

On 2012-07-03 20:52, Shoppa, Tim wrote:
>  > Baud rate changes were used a lot. Atleast on DEC systems.
>
> For the multiplexer style serial interfaces, yes. But just thinking
> about VAX-11 and PDP-11... for system consoles (the equivalent of what
> you get in the VAX or PDP-11 simh emulator) the baud rate was either set
> with wire-wrap (DL11 or DLV11J type boards), with dipswitches (third
> part DL11 emulating boards), a little knob at the console port, or in at
> least one non-DEC 11 compatible, in nonvolatile configuration RAM.
> Pretty much "fixed baud" for the console.
>
> I have no doubt someone will put DLV11J style wire wrap terminals on a
> little panel and wire it up to a patched version of SIMH to allow
> console baud rates to change on the fly :-)

Right. Which is why my initial response only dealt with the console, 
which I said is simpler in many systems, and you can get away with 
less... :-)

Consoles in most cases also do not have modem control. Or just a limited 
subset of the signals.

	Johnny