Re: [Plib-users] Don't Do This!

[Christian M. <ma...@Ch...>]

Steve Baker wrote:
> 
> I puzzled about what might be wrong with my code - but eventually
> (after some questions to the LinuxGameDev mailing list and a bit of
> web surfing) discovered that this is a hardware limitation of the PC
> keyboard!
> 
> Aaaaggghhhh!!!!
> 
> I hadn't noticed it when testing because with just me pushing one
> or two keys, I never hit the combinations that cause problems.
> 
> This suprised me a lot (which is why I'm writing this email - so that
> others don't fall into the same trap).
> 
> The rule is approximately that if you hold down three keys that form
> the corners of a rectangle on the keyboards 'scan matrix' (E, C and I
> for example) then depending on the age of your keyboard, you'll either
> find that the third key you press will be ignored *or* the key at the
> fourth corner of that rectangle will appear to be pressed even though
> it isn't!
> [...]

Have you tried a USB keyboard? I could imagine that they aren't using
the old style method. And if that doesn'T work it's possible to try 2
USB or 1 USB and 1 PS/2 keyboard, etc.

CU,
Christian

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