2005 85 669 4 334 1 ATmega88 LCD1 4294967295 1 17 4 0xc1fa9d 3 PORTD bit 4..7 bit 0..3 PORTC 0 0 PORTC 2 PORTC 1 Keypad1 147 6 PORTB 4 PORTB 5 PORTB 6 PORTB 7 PORTB 0 PORTB 1 PORTB 2 PORTB 3 1 1414676816 4 1010717778 7 1951678782 Clear 788541750 2 1345272894 5 1380012092 8 1044729153 0 909670766 3 1162690894 6 1045713473 9 1312570964 Enter 1769231425 Add 1095642880 Sub 1380012079 Mult 1045713473 Div 1413561925