[cctalk] Re: Vintage Computer Fest Midwest "DECnut" pizza party

[Paul Koning via cctalk]

> On Sep 6, 2023, at 3:00 PM, Mike Katz via cctalk <cctalk@classiccmp.org> 
> wrote:
> 
> Paul,
> 
> I'm not an 11 expert but don't most instruction fetches (or the last clock 
> phase on an instruction) cause the pc to increment by one?

No, by 2 because memory addresses are byte addresses but instructions are 
2-byte words and word aligned.

I just remembered two other PDP-11 trivia questions, not model dependent.

1. Describes a one-word program that executes backward in memory.
2. Describe a one-word program that clears the entire 16-bit address space, 
halting on completion.

        paul