Null program (was Re: ITS DDT anecdote)

Tony Duell ard.p850ug1 at
Thu Jul 12 10:08:23 CDT 2018

On Thu, Jul 12, 2018 at 3:20 PM, Eric Smith via cctalk
<cctalk at> 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.


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