[Coco] More Color Forth

[Arthur Flexser]

At some point, if you intend this for general rather than just personal
use, you should include a test for the disk ROM version and modify the
$CF7E jump address to its 1.0 equivalent if that ROM is detected.  Probably
nobody is using 1.0 per se, but some third party modified DOSes, like ADOS,
may be built around that version.

Thanks to Darren for putting his finger on the exact source of the problem,
which I should have seen.  As you say, doh!

Art

On Sun, Jan 25, 2015 at 3:54 PM, Stephen Pereira <spereira1952 at comcast.net>
wrote:

> Thanks a million, Darren!
>
> Art was trying to tell me the same thing, but I was not understanding what
> he meant.  I get it, now!  DOH!
>
> Thanks very, very much, both Art and Darren, for helping me break this
> logjam!
>
> smp
> --
> Stephen M. Pereira
> Bedford, NH  03110
> KB1SXE
>
>
> > On Jan 25, 2015, at 3:46 PM, Darren A <mechacoco at gmail.com> wrote:
> >
> > On Sun, Jan 25, 2015 at 12:01 PM, Stephen Pereira wrote:
> >
> >>
> >> What I am concerned about is whether or not I am getting the addresses
> >> onto the stack in the right order, and with the correct byte order.
> >>
> >> The reason I’m asking is that this code “kind of works” in my Color
> >> Forth.  I do get a file onto disk called SCRN1TO8.BIN, but it is 21
> blocks
> >> long, instead of 4 blocks, like I expected.
> >>
> >> Finally, while my Drivewire UI shows the disk activity start and end, my
> >> code does not return to the command line in Color Forth, so I am also
> >> concerned about that.  I see in the “Disk Basic Unravelled” that the
> SAVEM
> >> command dose end with an RTS, so I did expect my code to return.
> >>
> >
> >
> > I think the problem is that you do a JSR to $CF7E instead of JMP.  The
> JSR
> > pushes a return address onto the stack in front of your address
> > parameters.  The SAVEM code doesn't expect that to be there. A return
> > address could be manually pushed prior to the parameters and then you can
> > JMP to $CF7E and have it return.
> >
> > - Darren
> >
> > --
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>
>
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