PC Keyboard
the MSX was ahead of its time (and still is) with the keyboard 
Do you think so? I find a polling-based keyboard quite the pain in the **... It happens often that I type the letters 'MSX' on my A1ST, resulting in 'MScolor 15,4,7'...
** pisses on the lame keyboard matrix ** 
Retry: 'MS[pause]X' --> 'MSX' --> YAY!
thaz wha I was talkin' 'bout. Dude.
Seriously: on one of your futuredisks (#39 iirc) the whole matrix plot is detailed. Arjan found it when coding the Metal Gear parody 
It's just optimized better to allow for game-minded keyboard mashing...
You know... It is not just habit to use GRAPH as second fire button (or N/M in Konami games). Some games also use SHIFT, but have you noticed that those games don't use keys F1-F3 at all. 
'MScolor 15,4,7'...
It is MSXcolor 15,4,7
Somehow I have also always had BASICY.BAT in my HDD path.
Seriously: on one of your futuredisks (#39 iirc) the whole matrix plot is detailed. Arjan found it when coding the Metal Gear parody
There is no any mystery. Take a look at MSX keyboard matrix. (can be found from many manuals) If you see, that two keys are in a same row and you can draw a retangle, where three pressed keys are in the corners, the "ghost key" is the missing corner of the retangle.
It is MSXcolor 15,4,7Hmmm... that must be compass then ... It apparently ignores everything typed within 1/60s after a line break ...
So that's why it is MScolor 15,4,7 here
