On 06-Jul-97, Gabor Manic wrote to Christopher Butler about Help me!.
 CB>> if (inp(0x64) & 1)  // same as kbhit()
 GM>         ^^^^^^^^^^^^^^^
 GM>         The problem is here
 GM> Here you set the first bit if it is already set, and erase the others.
No, he isn't!
 GM> This port can't be changed, and that is the reason why your computer
 GM> crashes.
He's inputing, not outputing, so there's NP there. I would recomend him
to use kbhit() instead...
 GM> If you want a chack the state of N-th bit you can do that like this:
 GM> ... (inp(0x64) && 1)
This will work even if the value returned by inp() has not the D0 set,
but other bit.
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