implement commands:

and a, b, #0x21

ALUadd ALUsub ALUand ALUor ALUPE Dle Doe Ale Aoe Ble Boe 07 06 05 04 03 02 01 DO Instruction Control State Machine Clock Data Ble Boe ALUadd ALUsub ALUand ALUor ALUoe ALU AL Uadd ALUsub AL Uand ALUor ALUE Die Doe Ale Aoe Ble Boe D7D6D5 D4 D3 D2 D4 DO cycle 1 Cycle 2 cycle 3 III I cycle 4