Could anyone can interpret and explain in detail about the sequence? Itll be so pleasureable if someone can help this Microprogram :)

gram (Part TABLE 7-2 Symbolic Micropro Microoperations CD Label Ab ORG O I C U JMP U JMPEXT NOP ADD ORG 4 NOP ADD: S JMP U JMP BRANCH: NOP NOP OVER: U JMP ARTPC ORG 8 ACTDR NOP WRITE ORG 12 STORE: U JMP NEXT U JMP I CALL INDRCT U JMP NEXT EXCHANGE: NOP READ ACTDR, DRTAC U MP NEXT WRITE U JMP FETCH ORG 64 PCTAR READ, INCPC U JMP NEXT DRTAR FETCH: U JMP NEXT INDRCT: U MAP U JMP NEXT U RET