According to George Neuner <
gneuner2@comcast.net>:
There's no memory management hardware in an 8088, and PC/IX ran on a
basic PC/XT.
Programmatically - the compiler (and/or assembler) could disallow it.
Programmatic isolation works quite well as long as everyone plays by
the rules. [Which, of course, is hard to enforce.]
The PC/IX C compiler generated small model code so it was fairly hard
to smash anything outside your data segment by accident. If you wanted something that ran the programs you could run on a PDP-11 with Unix, it
did a really good job. Unfortuantely, there weren't very many people
who wanted that.
--
Regards,
John Levine,
johnl@taugh.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail.
https://jl.ly
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