Re: running .system files from BASIC

[Robert Boucher <boucher1@alumni.utexas.net>]

Don Bruder wrote:
> 
> In article <40709349.26C1@alumni.utexas.net>,
>  Robert Boucher <boucher1@alumni.utexas.net> wrote:
> 
> > If you old enough, you know that D$ was almost universally used for
> > CHR$(4). Therefore,
> >
> > 10 D$=CHR$(4)
> > 20 ?D$"-program to run"
> > .
> > .
> > .
> > .
> > 150 ?D$"-another program to run"
> 
> Except for one minor detail:
> It's *VERY* likely that like 150 won't exist after line 20 executes - A
> .system program (which, coincidentally, is what "basic.system" is)
> *MUST* load at $2000, and begin execution at that same location. Whether
> it's "smart" enough to move itself out of the way after being loaded is
> one of the big questions. I believe basic.system does, but I can't swear
> to it anymore. Even if it does, there's no predicting what kind of
> memory-stomping dance the next .system file is going to perform, so
> there's no guarantee that basic.system (or the basic program that was
> running under it) will be intact after another .system program has been
> loaded/executed.

Correct. Without thinking I was trying to show that D$ could be used
throughout the program. Or, 

11 Get N
12 on N go to 20,150
> 
> --