hex
PORTA 0 portpin: PA.0
PORTA 1 portpin: PA.1
PORTA 2 portpin: PA.2
PORTA 3 portpin: PA.3
PORTA 4 portpin: PA.4
PORTA 5 portpin: PA.5
PORTA 6 portpin: PA.6
PORTA 7 portpin: PA.7
\ initially all off
\ 00 PORTA c!
\ make all output
\ FF PORTA 1- c!