Re: MBBack

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From	"Richard Torrens (News)" <news@Torrens.org>
Newsgroups	comp.sys.acorn.apps
Subject	Re: MBBack
Date	Thu, 12 Jun 2025 19:38:51 +0100
Organization	Torrens
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In article <5c2bc81f71News03@avisoft.f9.co.uk>,
   Martin <News03@avisoft.f9.co.uk> wrote:
> In article <5c2bbb8e52news@Torrens.org>,
>    Richard Torrens (News) <news@Torrens.org> wrote:
> > I run Martin Bazley's MBBack
> > http://starfighter.acornarcade.com/mysite/downloads/mbbback.zip
> > with about 10,000 jpegs in it's list of backdrops. But recently, on
> > a Titanium, it has started throwing up an error:
> >    Invalid controller/port ID

> Any clues like the line number?

No: No line number quoted, so it looks like the error is not from Basic.
Once the error has been triggered it can sometimes survive over a reset,
so it looks like something is writing (a byte?) to wrong place.

> Does it happen on startup, or randomly while running?

Yes! Either.
There are two programs: one is for editing the list of photos to be used
as backdrops. This also triggers the backdrop change.

The second displays the photo. It also deletes that line from the list to
be used. Hence the write to storage, which triggers the error response.
But it looks to me like the misplaced byte is caused by a graphic/display
routine.

> > After this error disc reads seem to be OK, but attempting to write
> > gives "Bad Freespace Map" so it seems to be quite a serious bug!

> Nasty. Do you use DiscKnight to fix it?

No: DiscKnight can't fix it! But the disc verifies OK. I'm aware of the
differences.

> > Initially on the Titanium the error was that there was insufficient
> > memory available. It would do this every few days, so not a huge
> > problem. Then the error changed, apparently without cause. I
> > updated the OS to 5.30 (15-May-24) but this hasn't changed things.

> > The program is written in BASIC and has never given an error in
> > several years running on an ARMX6. Martin doesn't have a Titanium
> > to investigate.

> I have a Titanium ... but have not run MBBack, but I would have hoped
> it wrote little to a disc.

> Martin

-- 
------------------------------------------------------------------
Richard Torrens.

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Thread

MBBack "Richard Torrens (News)" <news@Torrens.org> - 2025-06-12 09:50 +0100
  Re: MBBack Martin <News03@avisoft.f9.co.uk> - 2025-06-12 12:07 +0100
    Re: MBBack "Richard Torrens (News)" <news@Torrens.org> - 2025-06-12 19:38 +0100
      Re: MBBack druck <news@druck.org.uk> - 2025-06-12 22:12 +0100
        Re: MBBack "Richard Torrens (News)" <news@Torrens.org> - 2025-06-13 08:56 +0100
          Re: MBBack druck <news@druck.org.uk> - 2025-06-13 21:21 +0100
            Re: MBBack "Richard Torrens (News)" <news@Torrens.org> - 2025-06-15 10:47 +0100
      Re: MBBack Harriet Bazley <harriet@bazleyfamily.co.uk> - 2025-06-13 23:42 +0100
        Re: MBBack "Richard Torrens (News)" <news@Torrens.org> - 2025-06-15 10:53 +0100
    Re: MBBack Harriet Bazley <harriet@bazleyfamily.co.uk> - 2025-06-12 19:43 +0100

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