[Simh] DLI losing upper bit

Mark Pizzolato Mark at infocomm.com
Thu Jun 25 11:07:18 EDT 2020


On Thursday, June 25, 2020 at 7:28 AM, Paul Koning wrote:
> I'm trying to use a SIMH PDP11 "DLI" device for DDCMP.  That requires 8 bit
> transparent data, of course.  It's not working.
> 
> A trace shows that the simulator is stripping the upper bit on received bytes.
> The console has a command to tell it not to do that (set tti 8b).  But while there
> is "set dlo 8b" there is no "set dli 8b".
> 
> Is there a way to get DLI not to corrupt data?

      sim> SET DLOn 8B

Affects BOTH input and output traffic mode for line 'n' on the MUX.

      sim> SET DLO 8B

is ONLY equivalent to:

      sim> SET DLO0 8B

This is illustrated by HELP DLO SET

- Mark


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