[Simh] PDP10: KS10 console lights?

[Lars Brinkhoff]

Timothe Litt wrote:
> > I have checked the KS10 instruction set.  It doesn't have a DATAO
> > PI, instruction.  However that particular opcode isn't in used, so
> > it's just a UUO.  This is also the case for ITS microcode.  Before I
> > start working on anything, I'd like to ask if it would be OK to
> > repurpose this opcode for its traditional use?
>
> Neither the KL nor the KS use DATAO PI,. I don't have a problem with
> implementing it for the KS. It would need to act like any IO
> instruction - MUUO in user mode, functional in Exec and with
> User-In-Out.

Of course.

The next problem is, how to access USB from SIMH?  I have something that
works in Linux.  I checked SIMH to see if there's a built in USB API
that works across operating system, but I didn't see any.