I believe it is for the menu-driven version of RSX that ran on DEC's PDP-11 based PC.  I believe it was branded "POS" something, but I don't remember what those letters meant.  We had our own local inappropriate meaning of the acronym, which I won't repeat here as, nearly four decades after the fact, I'm really embarrassed by our arrogance.  Anyway, our word has blotted out whatever it meant...

What I remember is that the the keyboard drove my manager of the time, Frank da Cruz (or Mr. Kermit) absolutely bonkers as he attempted to test/bring up Kermit on it.  He really didn't like the "Do" button.  Whenever Kermit hung the machine (which was frequently in early versions), he would would windmill his right arm, swooping down and pushing the button, intoning "Do. Do.. Do...  DO!" until he had to reboot/repower.  He got pretty peeved.

I forget the product name, but it wasn't Rainbox; that was an 8086 or something. 

On 10/20/2022 3:38 PM, Johnny Billquist wrote:

Hmm. Oops. I have to correct myself, as well as Thomas.
Looking at the RSX code, the system types are defines as such:

OS$COP'B'= 13.                  ; COPOS/11

  Anyone know what COPOS/11 refers to?

==
Lek K. Gleason N5ZMR
Control-G Consultants
lee.gleason@comcast.net
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