[Coco] Strings in DECB

[S Klammer]

If memory serves, a FRE(A$) will also force 'garbage collection'.

Shain
On Oct 21, 2015 12:19 AM, "Arthur Flexser" <flexser at fiu.edu> wrote:

> 128 or 255 as max length?
>
> The relevant ROM code, in the string concatenation routine, is:
>
> B61D LDB  ,X       # characters in 1st string
> B61F LDX <$52    Get 2nd string stack pointer
> B621 ADDB ,X      Add # characters in 2nd string
> B623 BHS $B62A  Length okay if no carry
>   (otherwise ?LS error)
>
> As I read this, with my rusty 6809 skills, this indicates a length of 255
> will be okay for a string, since only a value greater than 255 will set the
> carry.
>
> Art
>
>
> On Tue, Oct 20, 2015 at 10:15 PM, Robert Hermanek <
> rhermanek at centurytel.net>
> wrote:
>
> > I believe the maximum length is indeed 128.  You may be getting a OS
> error
> > because you have not allocated any extra string space... try a CLEAR 1000
> > statement at the beginning of your test program.
> >
> > -RobertH
> >
> >
> > On 10/20/2015 9:01 PM, Theodore (Alex) Evans wrote:
> >
> >> I was talking with a friend.  We had a disagreement about the maximum
> >> length of strings under DECB. He claimed it was 128 and I believe d it
> was
> >> 255. So I did some testing. The results were puzzling. I created a
> string
> >> and began extending it. Any attempt to extend a string of 100
> characters or
> >> more (even with an empty string "") results in an OS error as does any
> >> attempt to extend a string past 100 characters, but I can define and
> use a
> >> string up to 255 characters in length.
> >>
> >>
> >>
> >>
> >
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> >
>
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