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echo: apple
to: comp.sys.apple2
from: Michael J. Mahon
date: 2009-01-10 02:58:32
subject: Re: From the WTF File: ProDOS and DOS 3.3 peacefully cohabiting

lyricalnanoha wrote:
> I threw this together:
> 
> http://usotsuki.info/thedosescape.zip
> 
> This contains a program I wrote to cram DOS 3.3 into 256 fewer bytes (by 
> disabling format and revectoring a couple patches) so that ProDOS need 
> not be overwritten.  It's a SYS file, and runs from ProDOS 8.  (I also 
> tested it under GS/OS 5.0.4)  On the DOS 3.3 side of the disk is a file 
> RETURN TO PRODOS, which pokes in the MLI call for "quit",
then executes 
> it - proving that ProDOS is still fully available.
> 
> It's useless, but eh.

DOS 3.3 will run happily in just 16KB...

-michael

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