[Coco] toolshed tools lock up on ?FS ERROR disks

Arthur Flexser flexser at fiu.edu
Mon Feb 6 22:33:54 EST 2017

P.S.  Alan, if you put T0S2 and T17S2 at $600 and $700, a nice way to
compare the two would be

10 POKE &HFFC7,0
20 GOTO 20

which will move the 32-column display window to $600.  Then you can
instantly see if the upper half of the screen looks like an updated version
of the bottom half that got plopped down on the wrong track.


On Mon, Feb 6, 2017 at 3:24 PM, Allen Huffman <alsplace at pobox.com> wrote:

> > On Feb 6, 2017, at 2:05 PM, Arthur Flexser <flexser at fiu.edu> wrote:
> >
> > You don't really need a disk zapper for this.  Here's a Basic program
> that
> > would copy T0S2 to T17S2:
> Ah, I meant for inspecting the disk to look at it. I was thinking I could
> use DSKI$/DSKO$ to move the sectors (though I bet ColorZap does that too,
> if it's like dEd).
> > 10 DK=256*PEEK(&HC004)+PEEK(&HC005)  'DSKCON exec address
> COOL!  - I only saw DSKCON being used in a BASIC program recently, when I
> was going through old disks and found some software by Joel Hegberg. I do
> not remember ever knowing how to do that.
> This would get around I/O ERROR on a CoCo 1/2 (without the ON ERROR
> command).
> How do you detect an error? I assume there's a status byte you can read
> somewhere?
>                 -- Allen
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