Assign 2 variables for 1 port..

[oldtoddler]

This might be a fag or at least a newby question.. o:-)
How do I divide one port into "2 variables" ?
It works fine if I need all 8 bits, but I only need 3 or 4 and I'd hate to waste any port pins..

This is what I'm after:

BUSD VAR PORTD
A.0 VAR BUSD.0 (A has been defined as BYTE)
A.1 VAR BUSD.1
A.2 VAR BUSD.2
A.3 VAR BUSD.3
B.0 VAR BUSD.4 (B has been defined as BYTE)
B.1 VAR BUSD.5
B.2 VAR BUSD.6
B.3 VAR BUSD.7
...
LET A=10 (sets PortD pins 0..3 into %1010 = "10")
LET B=12 (sets PortD pins 4..7 into %1100 = "12")

any ideas?
LET BUSD = 202 (%11001010) works fine but it ain't practical way to do it..

thnx adv..

/MRa