[Simh] Various PDP11 fixes and enhancements

[Johnny Billquist]

On 2013-09-06 17:13, Bob Supnik wrote:
> 1. RK611 bug - RK07 not recognized on RSTS/E. Fixed. New version
> smoke-tested with VMS, M+, RSTS/E, and RT.

Nice!

> 2. RS03/RS04 - third Massbus adapter with RS03/RS04 fixed head disk.
> Only tested with RT11, as M+ and RSTS/E support requires a unique
> SYSGENs. Feel free to hack on it.

Is this something specific to a third massbus, or just a case of the 
RS03/RS04 devices as such? I mean, on M+ you can have all type of 
devices on the same massbus.

> 3. PDP11 CPU - MMR1 no longer tracks changes to the PC. The issue that
> it should not track changes in floating point instructions is still open.

I wasn't aware of any discussions. Could you, or someone sum it up? Is 
it a question of whether MMR1 should reflect changes to the general 
registers if a FP instruction is aborted? If so, I'm pretty sure they 
should be. I think I have read it somewhere in some documentation, and 
could try and locate it, if that really is the question.

Also, MMR1 might reflect changes to the PC as well, as far as I can read 
documentation... But it's "complicated". :-)

	Johnny

>
> As usual, look for recent checkins in the GitHub repository, or new
> files in the interim corrections directory on the SimH web site
> (http://simh.trailing-edge.com/interim).
>
> /Bob
> _______________________________________________
> Simh mailing list
> Simh at trailing-edge.com
> http://mailman.trailing-edge.com/mailman/listinfo/simh