Date   : Tue, 29 Jun 2010 23:11:31 +0100
From   : samwise@... (samwise)
Subject: BBC Master Compact key ghosting

Thanks, JGH!  That seems to match our current thinking.  I'll pass
your reply on and post back here if Paul has any follow-up questions
...

Peter.

On 29 June 2010 23:08, J.G.Harston <jgh@...> wrote:
> Argh!!! B****y stupid broken reply-to.
>
> Try again.
>
> samwise wrote:
>> Does a real BBC ghost in that way too?
>
> Yes. Any keyboard that used a key matrix does this due to basic
> fundamental electrics. Once three keys on the corners of a
> rectangle have been pressed together, the electricity can also
> flow as though the fourth corner has been pressed.
>
>> 1. Ignore it, allow ghosting
>
> If you're re-using any BBC series keyboard, then the ghosting
> will happen automatically due to the way electricity works. If
> you're not re-using a BBC series keyboard, it gets fiddly, as
> you then get ghosting from the actual wiring of the keyboard
> you are using and have the difficulty of overlaying that with
> the emulated ghosting of the emulated keyboard.
>
> As you seem to be reusing a BBC series keyboard, I'd recommend
> allowing the ghosting through, it's what would have really
> happened.
>
> JGH
>
>
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