65c22 PORTB = $6000 PORTA = $6001 DDRB = $6002 DDRA = $6003

buttons: pull high 1k -> VCC push -> VSS /GND PA0 : button - middle PA1 : button - up PA2 : button - down PA3 : button - left PA4 : button - right

LED: PB0 PB7

lda %11100000; / #$E0 set pin 5,6,7 as output and 4,3,2,1,0 as input
sta DDRA