[Coco] 6309 microproccessor project - 11-06-2003

[John Collyer]

Roger, this is my point.  I'm asking if anyone knows of any hardware mapped
to this area.  I look around but didn't see any.  Also I wanted to make
virtual hard drives with a limited amount of software on it; just enough to
have someone able to boot into, but small enough to email as a zip file.  I
could use a floppy to copy want I wanted over; this is exactly what I did,
but it would have been nice to just do it with a simple (chd /h1/cmds;
mscopy/dd/Temp/*) from within nitros-9.

John Collyer

----- Original Message ----- 
From: "Roger Taylor" <rtaylor at bayou.com>
To: <coco at maltedmedia.com>
Sent: Thursday, November 06, 2003 7:14 PM
Subject: Re: [Coco] 6309 microproccessor project - 11-06-2003


> At 01:10 PM 11/6/2003 -0500, you wrote:
> >6309 microprocessor project.
> >
> >Hello,
> >
> >Since the emulator memory model follows Paul Barton's NoCan 32MB/64MB
> >interface and it uses the MMU extension registers located at $FF80-$FF8F
> >along with the MMU registers at $FFA0-$FFAF I'll have to move the
emulator
> >vhd interface from $FF80-$FF85 to somewhere else.  I was thinking about
the
> >area right after the PIA's.  It looks like this area might be free?
> >
> >$FF04 RMB 28 PIA0 IMAGES
> >$FF24 RMB 28 PIA1 IMAGES
>
> I suppose since it's only a Virtual Hard Drive interface, only for the
> emulator, that it wouldn't be that bad of an idea, especially since OS-9
> can be configured so easily.  But watch out for real CoCo programs that
> might just happen to use some device that maps in there...
>
>
> >I can actually have 2 vhd interfaces easily fit into either area.  The
> >reason for 2 vhd interfaces is I felt the need to backup my emulated hard
> >drive already.  If anyone can shed light on this please respond.  If it
>
> c:\copy original.vhd backup.vhd
>
> :)
>
>
> Also, virtual floppy disks are cheaper than dirt these days!.....
>
> c:\copy blankSS35.dsk newSS35.dsk
>
> cheers
>
>
>
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