All,

Thanks for your input, but it still happens with the LALT key.  I
changed the keys to:

UP
LEFT
RIGHT
LCTRL
LALT


I you do UP/LEFT/LALT, LALT doesn't register.

Maybe my keyboard is just crap.

EP

On Apr 20, 7:39 am, Tristam MacDonald <[email protected]> wrote:
> On Wed, Apr 20, 2011 at 10:18 AM, anatoly techtonik 
> <[email protected]>wrote:
>
>
>
> > So, the advice is.. Change your keyboard! Not very user friendly.
>
> Well, no. The advice is that if you want normal users to be able to play
> your game, you need to select the keyboard controls such that they don't
> cause jams.
>
> The underlying keyboard matrix is laid out in a grid, and jamming only
> occurs if you press 3+ keys that share both a row and a column. So for
> example, the 4-key combo 'ASDF' will never jam, because they all lie in the
> same row.
>
> Also worth pointing out that the modifier keys (ctrl, alt, cmd/meta/windows
> and shift) will never jam other keys.
>
> ***
>
> You can also buy much more expensive keyboards which offer 'N-key rollover',
> which means that they guarantee that nay number of simultaneous key presses
> can be detected (USB and OS limits in reporting key presses may still apply,
> however).
>
> It wouldn't pay to expect the average user to have one of these keyboards,
> though.
>
> --
> Tristam MacDonaldhttp://swiftcoder.wordpress.com/

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