ENIAC programming Was: release dates of early microcomputer operating systems, incl. Intel ISIS

[Jon Elson]

>      > From: Dave Wade
>
>    
>
>      > to me a "computer" without self-modifying code is a programmable
>      > calculator even if it has index registers...
>
>
Most modern computer languages run with the executable 
instructions in a "pure code" section, which is set to be 
NOT writeable by the program.  This avoids a LOT of simple 
mistakes and REALLY hard to find program crashes.
This is true of MS, Linux/Unix and the VMS program 
environment that I have used for about 40 years.  I think 
you have to go back to maybe Windows 95 or RT-11 to not have 
that protection.

Jon