[Simh] Improved CRT simulation

[Lars Brinkhoff]

Phil Budne wrote:

> Paul wrote:
>> If you insist on round looking points, probably so.  But I find that
>> a 1k wide emulated device on a "4k" display works fine.
> Good to know!  I was walking around today and realized anti-aliasing
> surrounding 2x2 might do the trick!

I think that'll be fine.  After all this rather small picture ought to
look rather convincing.  (If a bit blurry!)

https://www.chessprogramming.org/images/b/b2/Machackdisplay02.jpg