diff --git a/Codes/PASS I Micro.txt b/Codes/PASS I Micro.txt
new file mode 100644
index 0000000..16db3ce
--- /dev/null
+++ b/Codes/PASS I Micro.txt	
@@ -0,0 +1,88 @@
+class pass1macro:
+def __init__(self,filename):
+self.filename = filename
+self.lines = []
+with open(filename, "r") as input_file:
+for line in input_file:
+self.lines.append(line.rstrip().split(" "))
+def pass1(self):
+self.mdt = []
+self.mnt = {}
+self.pntab = {}
+self.kptab = {}
+self.kptr = 100
+self.mdtptr = 0
+isInMacro = False
+i = 0
+macro_name = ""
+while i < len(self.lines):
+if self.lines[i][0] == "MACRO" and not isInMacro:
+isInMacro = True
+i += 1
+macro_name = self.lines[i][0]
+params = self.lines[i][1].split(",")
+startptr = self.kptr
+self.pntab[macro_name] = {}
+kp = 0
+for param in params:
+if "=" in param:
+kp += 1
+key = param.split("=")[0]
+if len(param.split("=")) == 2:
+val = param.split("=")[1]
+else:
+val = ""
+self.kptab[self.kptr] = (key, val)
+self.kptr += 1
+self.pntab[macro_name][len(self.pntab[macro_name]) + 1] = param.split("=")[0]
+self.mnt[macro_name] = (len(self.pntab[macro_name])-kp, kp, self.mdtptr, startptr)
+elif self.lines[i][0] == "MEND" and isInMacro:
+macro_name = ""
+isInMacro = False
+self.mdt.append(self.lines[i][0])
+self.mdtptr += 1elif isInMacro:
+inst = " ".join(self.lines[i])
+for key in self.pntab[macro_name]:
+inst = inst.replace(self.pntab[macro_name][key], f"(P,{key})")
+self.mdt.append(inst)
+self.mdtptr += 1
+i += 1
+print("Macro Name Table:")
+# print("Name PP KP MDTP KPDTP")
+# for key,val in self.mnt.items():
+# print(f"{key} {val[0]} {val[1]} {val[2] }")
+print(self.mnt)
+print("Keyword Parameter Name Table:")
+print(self.kptab)
+print("Parameter Name Table:")
+print(self.pntab)
+print("Macro Definition Table:")
+print(self.mdt)
+obj = pass1macro("prog1.asm")
+obj.pass1()
+Testcase:
+MACRO
+ONE &O,&N,&E=AREG
+MOVER &E,&O
+ADD &E,&N
+MOVEM &E,&O
+MEND
+MACRO
+TWO &T,&W,&O=DREG
+MOVER &O,&T
+ADD &O,&W
+MOVEM &O,&T
+MEND
+START
+READ O
+READ T
+ONE O,9
+TWO T,7
+STOP
+O DS 1
+T DS 1
+END
+
+
+
+Output:
diff --git a/Codes/PASS2MACRO.txt b/Codes/PASS2MACRO.txt
new file mode 100644
index 0000000..2d46d34
--- /dev/null
+++ b/Codes/PASS2MACRO.txt
@@ -0,0 +1,202 @@
+INPUT FILES:
+mnt.txt
+ONE 2 1 1 1
+TWO 2 1 5 2
+mdt.txt
+MOVER (P,3) (P,1)
+ADD (P,3) (P,2)
+MOVEM (P,3) (P,1)
+MEND
+MOVER (P,3) (P,1)
+ADD (P,3) (P,2)
+MOVEM (P,3) (P,1)
+MOVER CREG, (P,1)
+ADD CREG,9
+MOVEM CREG, (P,1)
+MEND
+ir.txt
+START
+READ O
+READ T
+TWO T, 7
+PRINT O
+PRINT T
+STOP
+O DS 1
+T DS 1
+END
+kpdt.txt
+1 E AREG
+2 O DREG
+CODE:
+package macroP2;
+import java.io.BufferedReader;import
+import
+import
+import
+import
+java.io.FileReader;
+java.io.FileWriter;
+java.io.IOException;
+java.util.HashMap;
+java.util.Vector;
+public class macrop2 {
+public static void main (String[] args) throws IOException {
+BufferedReader mntb=new BufferedReader(new FileReader("mnt.txt"));
+BufferedReader mdtb=new BufferedReader(new FileReader("mdt.txt"));
+BufferedReader kpdtb=new BufferedReader(new FileReader("kpdt.txt"));
+BufferedReader irb=new BufferedReader(new FileReader("ir.txt"));
+FileWriter fr=new FileWriter("pass2.txt");
+HashMap<String,MNTEntry>mnt=new HashMap<String,MNTEntry>();
+HashMap<Integer,String>aptab=new HashMap<Integer,String>();
+HashMap<String,Integer>aptabinverse=new HashMap<String,Integer>();
+Vector<String>mdt=new Vector<String>();
+Vector<String>kpdt=new Vector<String>();
+String line;
+int mdtp,kpdtp,pp,kp,paramNo;
+while((line=mdtb.readLine())!=null)
+{
+mdt.addElement(line);
+}
+while((line=kpdtb.readLine())!=null){
+kpdt.addElement(line);
+}
+while((line=mntb.readLine())!=null){
+String[] parts=line.split(" ");
+mnt.put(parts[0], new
+MNTEntry(parts[0],Integer.parseInt(parts[1]),Integer.parseInt(parts[2]),Integer.pa
+rseInt(parts[3]),Integer.parseInt(parts[4])));
+}
+while((line=irb.readLine())!=null)
+{
+String []parts=line.split("\\s+");
+if(mnt.containsKey(parts[0]))
+{
+pp=mnt.get(parts[0]).getpp();
+kp=mnt.get(parts[0]).getkp();
+kpdtp=mnt.get(parts[0]).getkpdtp();
+mdtp=mnt.get(parts[0]).getmdtp();
+paramNo=1;
+for(int i=0;i<pp;i++)
+{
+parts[paramNo]=parts[paramNo].replace(",", "");
+aptab.put(paramNo, parts[paramNo]);
+aptabinverse.put(parts[paramNo], paramNo);
+paramNo++;
+}
+int j=kpdtp-1;
+for(int i=0;i<kp;i++)
+{
+String temp[]=kpdt.get(j).split(" ");aptab.put(paramNo,temp[1]);
+aptabinverse.put(temp[0],paramNo);
+j++;
+paramNo++;
+}
+for(int i=pp+1;i<parts.length;i++) {
+parts[i]=parts[i].replace(",", "");
+String []split=parts[i].split("=");
+String name=split[0].replace("&", "");
+aptab.put(aptabinverse.get(name),split[1]);
+paramNo++;
+}
+int i=mdtp-1;
+while(!mdt.get(i).equalsIgnoreCase("MEND"))
+{
+String splits[]=mdt.get(i).split(" ");
+fr.write("+");
+for(int k=0;k<splits.length;k++)
+{
+if(splits[k].contains("(P,"))
+{
+splits[k]=splits[k].replaceAll("[^0-9]", "");
+String
+value=aptab.get(Integer.parseInt(splits[k]));
+fr.write(value+"\t");
+}
+else
+{
+fr.write(splits[k]+"\t");
+}
+}
+fr.write("\n");
+i++;
+}
+}
+else
+{
+}
+aptab.clear();
+aptabinverse.clear();
+fr.write(line+"\n");
+}
+fr.close();
+mntb.close();
+mdtb.close();
+kpdtb.close();
+irb.close();
+System.out.println("Macro Pass2 done!");
+}
+}MNTEntry
+package macroP2;
+public class MNTEntry {
+int pp,kp,mdtp,kpdtp;
+String S;
+public MNTEntry(String s,int pp,int kp,int mdtp,int kpdtp) {
+this.S=s;
+this.pp=pp;
+this.kp=kp;
+this.mdtp=mdtp;
+this.kpdtp=kpdtp;
+}
+public String getname() {
+return S;
+}
+public int getpp() {
+return pp;
+}
+}
+public void setpp(int data) {
+this.pp=data;
+}
+public void setkp(int data) {
+this.kp=data;
+}
+public void setmdtp(int data) {
+this.mdtp=data;
+}
+public void setkpdtp(int data) {
+this.kpdtp=data;
+}
+public int getkp() {
+return kp;
+}
+public int getmdtp() {
+return mdtp;
+}
+public int getkpdtp() {
+return kpdtp;
+}OUTPUT:
+pass2.txt
+START
+READ O
+READ T
++MOVER
+DREG
++ADD DREG 7
++MOVEM
+DREG
++MOVER
+CREG,
++ADD CREG,9
++MOVEM
+CREG,
+PRINT O
+PRINT T
+STOP
+O DS 1
+T DS 1
+END
+T
+T
+T
+T
\ No newline at end of file
diff --git a/Codes/PASSS2MACRO.txt b/Codes/PASSS2MACRO.txt
new file mode 100644
index 0000000..8ec6cab
--- /dev/null
+++ b/Codes/PASSS2MACRO.txt
@@ -0,0 +1,118 @@
+Title : Design suitable data structures and implement Pass 1 of two pass macro-processor
+CODE
+#include <iostream>
+#include <bits/stdc++.h>
+using namespace std;
+int main(){
+vector<string> mdt;
+vector<string> mnt;
+vector <char> pnt[4];
+fstream file;
+int pointer=0;
+file.open("macro.txt",ios::in);
+string s = "",str="";
+int c = 0,r=0,a=-1,b=0;
+while(getline(file,s)){
+if(s=="MACRO"){
+b=1;
+c=1;
+a++;
+continue;
+}
+for(auto it:s){
+if(r==1){
+int z=0;
+for(auto x:pnt[a]){
+if(x==it){
+z=1;
+}
+}
+if(z==0){
+pnt[a].push_back(it);
+}
+r=0;
+}
+if(it=='&'){
+r=1;}
+}
+if(b==1){
+str="";
+int v=0;
+char t=s[v];
+while(t!=' '){
+str=str+t;
+v++;
+t=s[v];
+}
+mnt.push_back(str);
+b=0;
+}
+if(c==1){
+mdt.push_back(s);
+}
+if(s=="MEND"){
+c=0;
+}
+}
+file.close();
+cout<<"MDT"<<endl;
+for(auto it:mdt){
+cout<<it<<endl;
+}
+cout<<endl;
+for(int i = 0 ; i<=a ; i++){
+cout<<"PNT"<<i<<endl;
+for(auto it:pnt[i]){
+cout<<it<<endl;
+}
+cout<<endl;
+}
+cout<<"MNT"<<endl;
+for(auto it:mnt){
+cout<<it<<endl;
+}
+return 0;
+}Input File : macro.txt
+MACRO
+ONE &O,&N,&E=AREG
+MOVER &E,&O
+ADD &E,&N
+MOVEM &E,&O
+MEND
+MACRO
+TWO &T,&W,&O=DREG
+MOVER &O,&T
+ADD &O,&W
+MOVEM &O,&T
+MEND
+START
+READ O
+READ T
+ONE O,9
+TWO T,7
+STOP
+O DS 1
+T DS 1
+END
+OUTPUT :
+MDT
+ONE &O,&N,&E=AREG
+MOVER &E,&O
+ADD &E,&N
+MOVEM &E,&O
+MEND
+TWO &T,&W,&O=DREG
+MOVER &O,&T
+ADD &O,&W
+MOVEM &O,&T
+MEND
+PNT0
+O
+N
+E
+PNT1
+T
+WO
+MNT
+ONE
+TWO
\ No newline at end of file
diff --git a/Codes/Pass I Assembler.txt b/Codes/Pass I Assembler.txt
new file mode 100644
index 0000000..b8bcbc7
--- /dev/null
+++ b/Codes/Pass I Assembler.txt	
@@ -0,0 +1,125 @@
+Design suitable data structures and implement pass1 of a two pass asmbler
+import java.util.*;
+import java.io.*;
+class TableRow{
+String name;
+int index;
+int address;
+TableRow(String name,int address){
+super();
+this.name=name;
+this.address=address;
+this.index=0;
+}
+TableRow(String name,int index,int address){
+this.address=address;
+this.name=name;
+this.index=index;
+}
+public void setName(String name) {
+this.name=name;
+}
+public void setIndex(int index) {
+this.index=index;
+}
+public void setAddress(int address) {
+this.address=address;
+}
+public String getName() {
+return this.name;
+}
+public int getIndex() {
+return this.index;
+}
+public int getAddress() {
+return this.address;
+}
+}
+class Initialize{
+HashMap<String,Integer> AD;
+HashMap<String,Integer> IS;
+HashMap<String,Integer> CC;
+HashMap<String,Integer> RG;
+HashMap<String,Integer> DL;
+Initialize(){
+AD=new HashMap<>();
+IS=new HashMap<>();CC=new HashMap<>();
+RG=new HashMap<>();
+DL=new HashMap<>();
+AD.put("START",1);
+AD.put("END",2);
+AD.put("ORIGIN",3);
+AD.put("EQU",4);
+AD.put("LTORG",5);
+DL.put("DC", 1);
+DL.put("DS", 2);
+RG.put("AREG", 1);
+RG.put("BREG", 2);
+RG.put("CREG", 3);
+RG.put("DREG", 4);
+CC.put("LT", 1);
+CC.put("LTE",2);
+CC.put("EQ", 3);
+CC.put("NEQ",4);
+CC.put("GT",5);
+CC.put("GTE",6);
+IS.put("STOP",0);
+IS.put("ADD",1);
+IS.put("SUB",2);
+IS.put("MULT",3);
+IS.put("MOVER",4);
+IS.put("MOVEM",5);
+IS.put("COMP",6);
+IS.put("BC",7);
+IS.put("DIV",8);
+IS.put("READ", 9);
+IS.put("PRINT",10);
+}
+}
+class assembler {
+public static void main(String args[]) throws IOException{
+BufferedReader br=new BufferedReader(new FileReader("input.txt"));
+FileWriter pass1=new FileWriter("pass1.txt");
+FileWriter symtab=new FileWriter("symtab.txt");
+Initialize in=new Initialize();
+int symindex=0;
+int index=0;
+String line;int flag=0;
+while((line=br.readLine())!=null) {
+String parts[]=line.split("\\s+");
+for(int i=0;i<parts.length;i++) {
+parts[i]=parts[i].replaceAll(",","");
+if((in.AD.containsKey(parts[i]))==false) {
+if((in.CC.containsKey(parts[i]))==false) {
+if((in.DL.containsKey(parts[i]))==false){
+if((in.IS.containsKey(parts[i]))==false) {
+if((in.RG.containsKey(parts[i]))==false) {
+symtab.write(parts[i]+"\t"+ +
++symindex+"\n");
+}
+}
+}
+}
+}
+}
+}
+symtab.close();
+br.close();
+pass1.close();
+}
+}
+INPUT:
+START 100
+L1 MOVER AREG, X
+MOVEM AREG, Y
+ORIGIN L1+3
+NEXT ADD AREG, X
+SUB BREG, Y
+BC LT, L1
+ORIGIN NEXT+5
+MULT CREG, Z
+STOP
+X DS 2
+Y DS 1
+Z DC '9'
+END
\ No newline at end of file