Archived viruses, was Re: Reasonable price for a complete SOL-20 system?

[Liam Proven]

On 24 October 2016 at 03:15, Mouse <mouse at rodents-montreal.org> wrote:
>
> I disagree.  I see nothing about "a single-user OS without background
> processing" that would prevent a virus from infecting other programs,
> even including the OS, when it's run, and potentially doing something
> else as well.

Exactly. This. I agree. MS-DOS was a single-user OS without background
processing, but it had legions of viruses.

I don't think CP/M had TSRs as such...

https://en.wikipedia.org/wiki/CP/M#TSR_.28Terminate-and-Stay-Resident.29_programs

... but that doesn't mean it was totally impossible to get into RAM
and stay there, does it?

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