Re: From the WTF File: ProDOS and DOS 3.3 peacefully cohabiting

[lyricalnanoha <lyricalnanoha@usotsuki.hoshinet.org>]

On Sat, 10 Jan 2009, Michael J. Mahon wrote:

> lyricalnanoha wrote:
> > On Sat, 10 Jan 2009, David Schmenk wrote:
> >
> > > Why not save the global page in the high part of LC2, above the quit code? 
> > > You should have enough space for that plus a little extra.  You shouldn't 
> > > have to alter DOS 3.3 at all, but you could add to DOS a BYE command that 
> > > restored the global page and returned to ProDOS.
> >
> > Is that still true for e.g., ProDOS 8 v1.9 and later, or GS/OS?  (One of my 
> > tests is running The DOS Escape from GS/OS, and returning to the Finder.)
> >
> > Also, this would have other uses: you can still access the MLI because the 
> > system page is intact.  Not really valuable, but it could have its uses.
> >
> > Perhaps what I'll try to do is replace the INIT command altogether.
> >
> > What I *really* want to do is rewrite the File Manager to just issue MLI 
> > calls.  With this, stuff could get pretty low-level into DOS 3.3 and still 
> > work on ProDOS.  (And I want to try something with The Prisoner on it >:P)
>
> There were a fair number of DOS programs/games that made calls into the
> DOS RWTS.
>
> -michael

Hm.  Well, since I want to be "minimally invasive", the RWTS will prolly 
have to stay but with the format code diked out just like on The DOS 
Escape.  Then again a lot of the stuff I've broken BASIC.SYSTEM with is 
actually not doing anything with the disk.

-uso.