ProDOS/8 booting: how to run a different SYS file?

[jearls@phoenix.csc.calpoly.edu (Johnson Earls)]

Hey all,

    I wrote a program called 'BootSel' and am looking for ways to
expand it.  BootSel replaces the PRODOS file on a disk.  When the disk
is booted, it looks at the apple/command key and uses that to determine
whether to load GSOS or ProDOS/8 into memory.  It then loads the
appropriate file and executes it.  What I would like to do is to make
it so it can either boot ProDOS/8 normally, or tell ProDOS/8 to run a
specific SYS file when it starts rather than just running the first
.SYSTEM file it finds.  Note that when BootSel runs, ProDOS/8 isn't in
memory yet, so I can't just load another SYS file and run it; I have to
somehow modify the ProDOS/8 startup code to run whichever SYS file I'm
looking at.

Thanks,
- john
-- 
John `Addicted to VR' Earls         darkfox/Raleigh on FurryMUCK
jearls@blackbird.csc.calpoly.edu     jearls@data.acs.calpoly.edu
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