Re: NadaNet file server coming soon...

[mdj <mdj.mdj@gmail.com>]

On Apr 29, 8:09 pm, "Michael J. Mahon" <mjma...@aol.com> wrote:

> Making the application programs be responsible for loading up their
> environments makes an application much more readable than having the
> "initialization" part in a separate program running on the master.

For sure, and if the bootstrap fits in the reclaimed bock of ROM
space, perfect :-)

> > I particularly like the use of the Applesoft DATA statements in the
> > servers' command lexical scanner/parser. A little obtuse, but
> > nonetheless an elegant optimisation and an excellent performance/
> > maintainability engineering tradeoff. It must've been very tempting
> > just to recode the critical section in assembly ;-)
>
> Ironically, as I was coding the original nested-GOSUB Applesoft parser,
> I was always thinking on the side about how sweet it could be in
> assembly--the 6502 is a *great* scanning machine!

As a part of a compiler project I wrote a (sub) version of "lex" that
outputs pretty tight 6502 code. Pruning the DFA's down to optimal
execution time was great fun :-)

> You'll note that I couldn't resist in the case of folding the request
> to upper case in Applesoft.  Since that was the only character-by-
> character processing remaining (hex excepted), I wrote a snippet of code
> to fold the whole request in less time than it takes Applesoft to do one
> statement.  ;-)

That would really sting perfomance if it wasn't optimised out :-)

Matt