4. PLC.ASM Example

6. Addresses Machine Code in Hex :020000040000FA :020000000528D1 :08000800112800308C00831662 :1000100000308500F0308600831288308B0063004A :100020000F2800308D0006088E00F039031D2220B5 :1000300060300C05603A031925208D1928280E1A06 :100040002520282810308D04080008308D04080071 :0C0050000E088C000D0885000B10090044 :00000001FF plc.lst Listing file

7. From list file

9. 00000000 W Register

10. 00000000 TRISA Register Outputs 11110000 TRISB Register Inputs

11. 10001000 INTCON Register

13. 00000000 W Register

14. 01010000 PortB 01010000 W Register

15. 1111000001010000 Bitwise AND 01010000 W Register

17. 0001000000010000 Put a 1 in 4 th bit of OUTPUT

18. 0110000001000000 W Register Bitwise AND old_data 01100000 xorlw 00100000 Compare with 00000000 by checking Z bit

20. Simulation Create a new project Add the file plc.asm

28. Input