[Simh] PDP-10 simulation: DEUNA support help needed

[Timothe Litt]

Although I started to write a TOPS-10 DEUNA driver as a midnight
project, I never finished it.  So far as I know no one else did,
although the configuration support did find its way into the monitor. 
Sadly, there were (and are) only so many midnights, but the supply of
projects is infinite.

DECnet-10 supports ethernet on the KL, but the code for broadcast
devices (ethernet) is not conditionally assembled.  So in theory, it
should be possible to write a (or complete my) driver.  That's on my
list of projects - unfortunately, quite far down the list.  It would be
very nice to have.  Note also that there is code to support ANF-10 over
ethernet; that also needs to be hooked in.  Besides the driver proper,
there are also tables that should be setup for NML.  The KDP/DMR didn't
- but they have out-of-band monitoring and are much simpler to debug.

SimH provides the hardware, but obviously that has never been tested. 
As it works on the PDP-11/VAX, I don't expect issues on the -10.  You
should be able to set an address via SimH - for the real hardware, I
picked something convenient (but I don't remember what it is).  The -10
doesn't autoconfigure its Unibus (although SimH has code to do so); all
addresses are fixed.  You'd  put the address assignment (on UBA3) in
pdp10_defs.h & see that it finds its way to the DIB - see auto_tab in
pdp10_ksio.c.  Or just use set address.

The bottom line is that any support that you see in the monitor is
illusory; either you wait for real support to find its way up to the top
of my (or someone else's) project list, or take it on yourself :-)

Sorry.

P.S. Before someone asks:  TOPS-20 never had DEUNA support, and I never
started that project.  Early DECnet Phase IV development was on
TOPS-20.  It did use a 3COM ethernet board on the KS (this before DEUNA
was available & long before the KLNIA).  That driver was discarded
before the first TOPS-20 release of Phase IV, as the -20 group decided
not to support the KS.  There was never a -20 DEUNA driver.

This communication may not represent my employer's views,
if any, on the matters discussed. 

On 26-Apr-15 03:31, Cory Smelosky wrote:
> Hello,
>
> I'm (attempting) to get DEUNA support operating in the KS10 simulation
> (likely incorrectly).
>
> I'm running in to some TOPS-10 issues assembling a monitor...does
> anyone have a pre-genned TOPS-10 disk set up for DECnet on a KS10 with
> ethernet I can use to test...if I even get that far?
>
> Current status:
> * Shows up in SHOW DEV
> * Has a vector
> * Links correctly
> * Can be enabled and attach to a host device
>
> ...and that's about all I have managed. Doesn't have an actual UNIBUS
> address which is a LITTLE BIT OF AN ISSUE.
>


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