[sfpgywdj] ASCII keyboard

32 keys plus 3 modifier keys: shift control alt.  Shift sets bit 5.  Control unsets bit 6.  Alt sets bit 7.  (ASCII was designed with this in mind.)

@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_
76543210
01000000 = @

0 = control shift P
Space = control shift @

Not so much a useful keyboard but a way of typing arbitrary bytes, maybe for cryptography.