nice, as always, Rui :t
did you add the PORN operator ? 
you could leave the "P" out
i think that indicates bitwise, which - all our operations are bitwise
so, it would be
NOT C = NOT(A)
AND C = A AND B
OR C = A OR B
XOR C = A XOR B
NAND C = NOT (A AND B)
NOR C = NOT (A OR B)
XNOR C = NOT (A XOR B) = A XOR (NOT B) = (NOT A) XOR B
ANDN C = A AND (NOT B)
ORN C = A OR (NOT B)
XORN is not needed - logically the same as XNOR
Hi Dave,
i will reply soon, i hope!
i want to post the new powerful calculator with
new interesting functions. But we need to wait
because i need to test it.
Yes it does ORN and ANDN also.
Replacing constants is now a very simple
and fast procedure.
We compute expressions to save as a new or old constant/variable
The same for matrices.
We have up to 20 real/logic/matrix names for constants/variables.
The Inverse matrix is all inside the edit box in any case 2x2 to 20x20.
Error messages are now better