Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!pt.cs.cmu.edu!andrew.cmu.edu!gt0t+
From: gt0t+@andrew.cmu.edu (Gregory Ross Thompson)
Newsgroups: comp.sys.apple2
Subject: Re: ProDos from machine language
Message-ID: <ca1cg8m00WB9It0oZA@andrew.cmu.edu>
Date: 20 Mar 90 19:56:56 GMT
References: <1990Mar20.053133.16783@agate.berkeley.edu>
Distribution: usa
Organization: Carnegie Mellon, Pittsburgh, PA
Lines: 19
In-Reply-To: <1990Mar20.053133.16783@agate.berkeley.edu>

archie@wheatena.berkeley.edu (Archie Cobbs) writes:
> or whatever. Under DOS 3.3 you can do the exact same thing in assembly
> language (by sending the appropriate sequence of characters to $FDED)
> and DOS 3.3 will respond. However, under ProDos it seems that while the
> above Applesoft program works, the machine language equivalent doesn't
> get the attention of ProDos, and your command just appears unanswerd
> on the screen.

  What you want is "Beneath Apple Prodos" from Quality Software.  It
fully documents the ProDOS MLI.  I've found the book to be invaluable.
Basically, you call the MLI, tell it what you want it to do, and where
it can find the parameters.  It does its thing, and then all you do is
read back the error from the accumulator, and go to the parameter list
and get the returned values.  Kinda simple...

> -Archie
> Archie Cobbs                                      archie@brahms.berkeley.edu

		-Greg T.