[unnah]

If Ctrl sets bit 6 to 0, and Shift sets bit 5 to 1, the logical extension is to use Ctrl and Shift together to set the top bits to 01. Surely there must be a system somewhere that maps Ctrl-Shift-A to !, Ctrl-Shift-B to " etc.

[maybewhenthesun]

It's more that shift flips that bit. Also I'd call them bit 0 and 1 and not 5 and 6 as 'normally' you count bits from the right (least significant to most significant). But there are lots of differences for 'normal' of course ('middle endian' :-P )

[Leszek]

I guess in this system, you'd also type lowercase letters by holding shift?