Null program (was Re: ITS DDT anecdote)

[Tony Duell]

On Thu, Jul 12, 2018 at 3:20 PM, Eric Smith via cctalk
<cctalk at classiccmp.org> wrote:
> That reminds me of one of my favorite computer trivia questions:
>
> What is the shortest useful CP/M program?

My guess (and I am not a CP/M person) is that it's something
like the 0-length .com file. This will not affect memory when run,
but CP/M will then jump to 0x100 (normal .com file load address)
and thus re-start the last program you ran.

-tony