[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Apple II Memory Expansion Card and DOS 3.3?
- Subject: Re: Apple II Memory Expansion Card and DOS 3.3?
- From: david@wraith.cs.uow.edu.au (David E A Wilson)
- Date: 1996/10/21
- Newsgroups: comp.sys.apple2
- Organization: University of Wollongong, NSW, Australia.
- References: <549gi2$pjq@news.emi.com> <549jle$7h2@login.freenet.columbus.oh.us>
dalloff@freenet.columbus.oh.us (Dave Althoff) writes:
>Edhel Iaur (drsmooth@relex.com) wrote:
>: According to the Novenber 1985 issue of _A+_, one can make a DOS 3.3
>: RAMdisk on this card. How?
>This is the "any-slot" RAM card, right?
>I think the RAMDisk code is already built into the card for DOS 3.3, but
>you need to hook to it with an IN#n/PR#n; I'm not sure if INIT is required
>or not.
PR#n boots from the card. ProDOS & Pascal 1.3 work well.
IN#n after booting DOS 3.3 from floppy or other disk then installs a patch
that allows access to 400KB volume on the RAM disk. INIT is patched out to
prevent the patched version of DOS from spreading or to make room for the
patch I seem to recall.
--
David Wilson Dept CompSci Uni Wollongong Australia david@cs.uow.edu.au