import java.awt.*;
import java.awt.event.*;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import javax.swing.*;
import javax.swing.border.Border;
public class emulator extends JFrame{
JFrame f =new JFrame("8085 Emulataor By MD.Shaharyar Shaukat");
JPanel p_textarea,p_register,p_flag,p_memory,p_remark,p_convertor,p_buttons;
JLabel Acc,Reg_B,Reg_C,Reg_D,Reg_E,Reg_L,Reg_H,Reg_Stack,Pro_Coun,L_hex,L_dec,cF,zF,sF,pF,mem_adrs,mem_content;
JButton clear,compile,Line_by,convert,mem_insert;
JTextField hex,dec,Tex_Acc,Tex_Reg_B,Tex_Reg_C,Tex_Reg_D,Tex_Reg_E,Tex_Reg_H,Tex_Reg_L,Tex_Reg_Stack,Tex_Pro_Coun,Tex_cF,Tex_zF,Tex_sF,Tex_pF,Tex_mem_adrs,Tex_mem_content;
JTextArea txt=new JTextArea();
JTextArea txt_remark=new JTextArea();
JScrollPane scrolltxt = new JScrollPane(txt);
JFileChooser fc = new JFileChooser();
static String A[]=new String[65536];
char[] keyword = {'A','B','C','D','E','H','L','M'};
static String register[]=new String[7];
String store_stack,store_pc;
static int carry=0;
static int sign=0;
static int paritory=0;
static int zero=0;
String[] instlines;
String instr[]=new String[3];
String flipbtn="Edit Registers";
public void flag(){
cF=new JLabel("Carry Flag");zF=new JLabel("Zero Flag");sF=new JLabel("Sign Flag");pF=new JLabel("Paritory");
Tex_cF=new JTextField();Tex_zF=new JTextField();Tex_sF=new JTextField();Tex_pF=new JTextField();
cF.setPreferredSize(new Dimension(60, 30));
Tex_cF.setPreferredSize(new Dimension(40, 30));
Tex_cF.setEditable(false);
p_flag.add(cF);
p_flag.add(Tex_cF);
zF.setPreferredSize(new Dimension(60, 30));
Tex_zF.setPreferredSize(new Dimension(40, 30));
Tex_zF.setEditable(false);
p_flag.add(zF);
p_flag.add(Tex_zF);
sF.setPreferredSize(new Dimension(60, 30));
Tex_sF.setPreferredSize(new Dimension(40, 30));
Tex_sF.setEditable(false);
p_flag.add(sF);
p_flag.add(Tex_sF);
pF.setPreferredSize(new Dimension(60, 30));
Tex_pF.setPreferredSize(new Dimension(40, 30));
Tex_pF.setEditable(false);
p_flag.add(pF);
p_flag.add(Tex_pF);
p_flag.revalidate();
}
public void memory(){
mem_adrs=new JLabel("Adress 4bit Hex=");mem_content=new JLabel("Value=");
Tex_mem_adrs=new JTextField();Tex_mem_content=new JTextField();
mem_insert=new JButton("Insert");
mem_adrs.setPreferredSize(new Dimension(100, 30));
Tex_mem_adrs.setPreferredSize(new Dimension(70, 30));
p_memory.add(mem_adrs);
p_memory.add(Tex_mem_adrs);
mem_content.setPreferredSize(new Dimension(40, 30));
Tex_mem_content.setPreferredSize(new Dimension(50, 30));
p_memory.add(mem_content);
p_memory.add(Tex_mem_content);
mem_insert.setPreferredSize(new Dimension(200, 60));
p_memory.add(mem_insert);
p_memory.revalidate();
mem_insert.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
String x = Tex_mem_adrs.getText();
String y = Tex_mem_content.getText();
if(x.length()<=4 &&y.length()<=2){
try{
Integer decimal_x = Integer.parseInt(x, 16);
A[decimal_x]=y;
txt_remark.append("Adress="+x);
txt_remark.append("\n\nValue="+A[decimal_x]);
Tex_mem_adrs.setText("");
Tex_mem_content.setText("");
}
catch(NumberFormatException ne){
String error="Enter valid 4 Bit Hexadicmal Adress ";
txt_remark.setText(error);
}
try{
Integer decimal_y = Integer.parseInt(y, 16);
}
catch(NumberFormatException ne){
String error="Enter valid 2 Bit Hexadicmal Value";
txt_remark.setText(error);
}
}else{
txt_remark.setText("Please provide valid 4 Bit Hexdecimal adress and 2 bit Value" );
}
}
});
}
//save as function
public void SaveAs() {
final JFileChooser SaveAs = new JFileChooser();
SaveAs.setApproveButtonText("Save");
int actionDialog = SaveAs.showOpenDialog(this);
File fileName = new File(SaveAs.getSelectedFile() + ".txt");
try {
if (fileName == null) {
return;
}
BufferedWriter outFile = new BufferedWriter(new FileWriter(fileName));
String ln = System.getProperty("line.separator");
String text = txt.getText() ;
String as = text.replaceAll("\n", ln);
outFile.write(as.toString(),0, as.length());
// getting entry line by line
outFile.close();
} catch (IOException ex) {
txt_remark.setText("");
txt_remark.setText("Input output error pls Try again");
}
}
//
//constructor
public emulator(){
//all zero initialization of memory and register
all_zero_initialization();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Dimension dimension = Toolkit.getDefaultToolkit().getScreenSize();
int x = (int) ((dimension.getWidth() - f.getWidth()) / 2);
int y = (int) ((dimension.getHeight() - f.getHeight()) / 2);
f.setLocation(x-400, y-300);
f.setSize(910,615);
f.setVisible(true);
f.setResizable(false);
f.setLayout(null);
p_flag=new JPanel();
p_memory=new JPanel();
p_remark=new JPanel();
p_convertor=new JPanel();
//menu
JMenuBar fileMenu = new JMenuBar();
f.setJMenuBar(fileMenu);
JMenu menu =new JMenu("File");
fileMenu.add(menu);
JMenuItem save = new JMenuItem("Save");
JMenuItem ne = new JMenuItem("New");
menu.add(ne);
menu.add(save);
save.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
SaveAs();
}
});
//menu ends
//text area
Font font = new Font("SansSerif", Font.BOLD, 20);
txt.setFont(font);
scrolltxt.setBounds(3, 3, 500, 400);
f.add(scrolltxt);
validate();
//ends
//register display
p_register=new JPanel();
p_register.setBounds(506, 3, 230, 250);
Border border = BorderFactory.createLineBorder(Color.BLACK);
p_register.setBorder(BorderFactory.createTitledBorder(border, "Register"));
Acc=new JLabel("Accumalotar");
Reg_B=new JLabel("B");Reg_C=new JLabel("C");Reg_D=new JLabel("D");Reg_E=new JLabel("E");Reg_H=new JLabel("H");Reg_L=new JLabel("L");Reg_Stack=new JLabel("Stack Pointer");Pro_Coun=new JLabel("PC");
Tex_Acc=new JTextField();Tex_Reg_B=new JTextField();Tex_Reg_C=new JTextField();Tex_Reg_D=new JTextField();Tex_Reg_E=new JTextField();Tex_Reg_H=new JTextField();Tex_Reg_L=new JTextField();Tex_Reg_Stack=new JTextField();Tex_Pro_Coun=new JTextField();
Acc.setPreferredSize(new Dimension(90, 30));
Tex_Acc.setPreferredSize(new Dimension(100, 30));
Tex_Acc.setEditable(false);
p_register.add(Acc);
p_register.add(Tex_Acc);
Reg_B.setPreferredSize(new Dimension(20, 30));
Tex_Reg_B.setPreferredSize(new Dimension(70, 30));
Tex_Reg_B.setEditable(false);
p_register.add(Reg_B);
p_register.add(Tex_Reg_B);
Reg_C.setPreferredSize(new Dimension(20, 30));
Tex_Reg_C.setPreferredSize(new Dimension(70, 30));
Tex_Reg_C.setEditable(false);
p_register.add(Reg_C);
p_register.add(Tex_Reg_C);
Reg_D.setPreferredSize(new Dimension(20, 30));
Tex_Reg_D.setPreferredSize(new Dimension(70, 30));
Tex_Reg_D.setEditable(false);
p_register.add(Reg_D);
p_register.add(Tex_Reg_D);
Reg_E.setPreferredSize(new Dimension(20, 30));
Tex_Reg_E.setPreferredSize(new Dimension(70, 30));
Tex_Reg_E.setEditable(false);
p_register.add(Reg_E);
p_register.add(Tex_Reg_E);
Reg_H.setPreferredSize(new Dimension(20, 30));
Tex_Reg_H.setPreferredSize(new Dimension(70, 30));
Tex_Reg_H.setEditable(false);
p_register.add(Reg_H);
p_register.add(Tex_Reg_H);
Reg_L.setPreferredSize(new Dimension(20, 30));
Tex_Reg_L.setPreferredSize(new Dimension(70, 30));
Tex_Reg_L.setEditable(false);
p_register.add(Reg_L);
p_register.add(Tex_Reg_L);
Reg_Stack.setPreferredSize(new Dimension(90, 30));
Tex_Reg_Stack.setPreferredSize(new Dimension(100, 30));
Tex_Reg_Stack.setEditable(false);
p_register.add(Reg_Stack);
p_register.add(Tex_Reg_Stack);
Pro_Coun.setPreferredSize(new Dimension(90, 30));
Tex_Pro_Coun.setPreferredSize(new Dimension(100, 30));
Tex_Pro_Coun.setEditable(false);
p_register.add(Pro_Coun);
p_register.add(Tex_Pro_Coun);
f.add(p_register);
p_register.revalidate();
//ends
//flag display
p_flag=new JPanel();
p_flag.setBounds(742, 3, 150, 250);
p_flag.setBorder(BorderFactory.createTitledBorder(border, "Flag"));
flag();
f.add(p_flag);
p_flag.revalidate();
//ends
//memory initilization
p_memory=new JPanel();
p_memory.setBounds(506, 256, 386, 144);
p_memory.setBorder(BorderFactory.createTitledBorder(border, "Memory Initialization"));
memory();
f.add(p_memory);
p_memory.revalidate();
//ends
//remark
p_remark=new JPanel();
p_remark.setBounds(390, 403, 500, 160);
txt_remark.setPreferredSize(new Dimension(485, 130));
txt_remark.setEditable(false);
p_remark.add(txt_remark);
p_remark.setBorder(BorderFactory.createTitledBorder(border, "Remark"));
f.add(p_remark);
p_remark.revalidate();
//ends
//buttons
p_buttons=new JPanel();
p_buttons.setBounds(3, 403, 150, 160);
p_buttons.setBorder(BorderFactory.createTitledBorder(border, ""));
clear=new JButton("Clear");
clear.setPreferredSize(new Dimension(140, 46));
p_buttons.add(clear);
clear.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
txt.setText("");
}
});
compile=new JButton("Compile");
compile.setPreferredSize(new Dimension(140, 46));
p_buttons.add(compile);
compile.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
txt_remark.setText("");
compile();
}
});
Line_by=new JButton(flipbtn);
Line_by.setPreferredSize(new Dimension(140, 46));
p_buttons.add(Line_by);
Line_by.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
if(flipbtn.equals("Edit Registers")){
txt_remark.setText("");
Tex_Acc.setEditable(true);
Tex_Reg_B.setEditable(true);
Tex_Reg_C.setEditable(true);
Tex_Reg_D.setEditable(true);
Tex_Reg_E.setEditable(true);
Tex_Reg_H.setEditable(true);
Tex_Reg_L.setEditable(true);
Tex_Reg_Stack.setEditable(true);
Tex_Pro_Coun.setEditable(true);
flipbtn="Store value to Reg";
}else{
register[0]=Tex_Acc.getText();
if(register[0].length()>2){
txt_remark.setText("enter valid 2 bit hexa number");
register[0]=Integer.toHexString(0);
Tex_Acc.setText("");
}
register[1]=Tex_Reg_B.getText();
if(register[1].length()>2){
txt_remark.setText("enter valid 2 bit hexa number");
register[1]=Integer.toHexString(0);
Tex_Reg_B.setText("");
}
register[2]=Tex_Reg_C.getText();
if(register[2].length()>2){
txt_remark.setText("enter valid 2 bit hexa number");
register[2]=Integer.toHexString(0);
Tex_Reg_C.setText("");
}
register[3]=Tex_Reg_D.getText();
if(register[3].length()>2){
txt_remark.setText("enter valid 2 bit hexa number");
register[3]=Integer.toHexString(0);
Tex_Reg_D.setText("");
}
register[4]=Tex_Reg_E.getText();
if(register[4].length()>2){
txt_remark.setText("enter valid 2 bit hexa number");
register[4]=Integer.toHexString(0);
Tex_Reg_E.setText("");
}
register[5]=Tex_Reg_H.getText();
if(register[5].length()>2){
txt_remark.setText("enter valid 2 bit hexa number");
register[5]=Integer.toHexString(0);
Tex_Reg_H.setText("");
}
register[6]=Tex_Reg_L.getText();
if(register[6].length()>2){
txt_remark.setText("enter valid 2 bit hexa number");
register[6]=Integer.toHexString(0);
Tex_Reg_L.setText("");
}
store_stack=Tex_Reg_Stack.getText();
store_pc=Tex_Pro_Coun.getText();
Tex_Acc.setEditable(false);
Tex_Reg_B.setEditable(false);
Tex_Reg_C.setEditable(false);
Tex_Reg_D.setEditable(false);
Tex_Reg_E.setEditable(false);
Tex_Reg_H.setEditable(false);
Tex_Reg_L.setEditable(false);
Tex_Reg_Stack.setEditable(false);
Tex_Pro_Coun.setEditable(false);
flipbtn="Edit Registers";
}
}
});
f.add(p_buttons);
p_buttons.revalidate();
//ends
//convertor
p_convertor=new JPanel();
p_convertor.setBounds(156, 403, 230, 161);
p_convertor.setBorder(BorderFactory.createTitledBorder(border, "Hex to Dec Converter "));
hex=new JTextField("");
hex.setEditable(false);
L_hex=new JLabel("Hexadecimal");
dec=new JTextField("");
L_dec=new JLabel("Decimal");
convert=new JButton("Convert");
hex.setPreferredSize(new Dimension(90, 30));
L_hex.setPreferredSize(new Dimension(80, 30));
dec.setPreferredSize(new Dimension(90, 30));
L_dec.setPreferredSize(new Dimension(80, 30));
convert.setPreferredSize(new Dimension(170, 46));
p_convertor.add(L_dec);
p_convertor.add(dec);
p_convertor.add(convert);
p_convertor.add(L_hex);
p_convertor.add(hex);
f.add(p_convertor);
convert.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
String x = dec.getText();
int intx = Integer.parseInt ( x);
//String strI = String.valueOf(intx);
String hexval = Integer.toHexString(intx);
hexval.toUpperCase();
//txt_remark.setText("");
//txt_remark.setText(strI);
hex.setText(hexval);
}
});
p_convertor.revalidate();
validate();
//ends
}
public void compile(){
txt_remark.setText("");
String[] instlines = txt.getText().split("\\n");
//txt_remark.append(instlines[4]);
char ch;
for(int i=0;i<instlines.length;i++){
int len=instlines[i].length();
int st=0,end=0,counter=0;
instr[0]="";instr[1]="";instr[2]="";
for(int j=0;j<len;j++){
ch=instlines[i].charAt(j);
if(ch==' '||ch==','){
end=j;
instr[counter]=instlines[i].substring(st,end);
counter++;
st=j+1;
}
if(j==len-1){
instr[counter]=instlines[i].substring(st,len);
if(instr[counter].length()>1&&counter>0){
instr[counter]=instlines[i].substring(st,len-1);
}
}
}
txt_remark.append(instr[0]);
//SEND VALUE
instruction(instr[0],instr[1],instr[2]);
}
//txt_remark.append(instr[]);
}
//INSTRUCTION SET
public void instruction(String s1,String s2,String s3){
// MOV
if(s1.equalsIgnoreCase("MOV")){
int errorcase1=search(keyword,s2.charAt(0));
int errorcase2=search(keyword,s3.charAt(0));
int source=whichregister(keyword,s3.charAt(0));
int destination=whichregister(keyword,s2.charAt(0));
if(errorcase1==0&&errorcase1==0){
txt_remark.append("\n Sysntax error");
}
if(errorcase1==1&&errorcase1==1){
if(s2.charAt(0)!='M'&&s3.charAt(0)!='M'){
register[destination]=register[source];
display();
}else{
String memadrs=register[5]+register[6];
//txt_remark.append(memadrs);
Integer decimal_mem = Integer.parseInt(memadrs, 16);
String Data=A[decimal_mem];
if(s3.charAt(0)=='M'){
//txt_remark.append("\nTHIS OCCUR");
register[destination]=Data;
display();
}
//txt_remark.append(Data);
if(s2.charAt(0)=='M'){
A[decimal_mem]=register[source];
txt_remark.append("\nAdress="+memadrs);
txt_remark.append("VALUE="+A[decimal_mem]);
display();
}
}
}
}
//inst-2 MVI
if(s1.equalsIgnoreCase("MVI")){
if(s2.charAt(0)=='M'){
String memadrs=register[5]+register[6];
Integer decimal_mem = Integer.parseInt(memadrs, 16);
A[decimal_mem]=s3;
display();
txt_remark.append("\nAdress="+memadrs);
txt_remark.append("VALUE="+s3);
}else{
int errorcase1=search(keyword,s2.charAt(0));
int destination=whichregister(keyword,s2.charAt(0));
if(errorcase1==0){
txt_remark.append("\nSyntax error");
}else{
register[destination]=s3;
display();
}
}
}
//INST-3 LDA
if(s1.equalsIgnoreCase("LDA")){
if(s2.length()>4){
txt_remark.append("\nInvalid Address");
}else{
try{
Integer decimal_mem = Integer.parseInt(s2, 16);
register[0]=A[decimal_mem];
display();
}
catch(NumberFormatException ne){
txt_remark.append("\nAdress was not hexdecimal");
}
}
//Integer decimal_mem = Integer.parseInt(s2, 16);
}
//INST-4 LDAX
if(s1.equalsIgnoreCase("LDAX")){
int errorcase1=search(keyword,s2.charAt(0));
int source=whichregister(keyword,s2.charAt(0));
if(s2.length()>1||errorcase1==0){
txt_remark.append("\nSyntax error");
}
if(source>=1&&source<=6){
if(source==1||source==2){
String memadrs=register[1]+register[2];
Integer decimal_mem = Integer.parseInt(memadrs, 16);
register[0]=A[decimal_mem];
display();
}
if(source==3||source==4){
String memadrs=register[3]+register[4];
Integer decimal_mem = Integer.parseInt(memadrs, 16);
register[0]=A[decimal_mem];
display();
}
if(source==5||source==6){
String memadrs=register[5]+register[6];
Integer decimal_mem = Integer.parseInt(memadrs, 16);
register[0]=A[decimal_mem];
display();
}
}
if(source==0){
txt_remark.append("\nSyntax error");
}
}
//INST-5 STA content of acc are copied into mem
if(s1.equalsIgnoreCase("STA")){
if(s2.length()>4){
txt_remark.append("\nINVALID ADDRESS");
}else{
try{
Integer decimal_mem = Integer.parseInt(s2, 16);
A[decimal_mem]=register[0];
display();
txt_remark.append("\nAdress="+s2);
txt_remark.append("VALUE="+register[0]);
}
catch(NumberFormatException ne){
txt_remark.append("\nAdress was not hexdecimal");
}
}
}
//inst-6 STAX
if(s1.equalsIgnoreCase("STAX")){
int errorcase1=search(keyword,s2.charAt(0));
int source=whichregister(keyword,s2.charAt(0));
if(s2.length()>1||errorcase1==0){
txt_remark.append("\nSyntax error");
}
if(source>=1&&source<=6){
if(source==1||source==2){
String memadrs=register[1]+register[2];
Integer decimal_mem = Integer.parseInt(memadrs, 16);
A[decimal_mem]=register[0];
display();
txt_remark.append("\nAdress="+memadrs);
txt_remark.append("VALUE="+A[decimal_mem]);
}
if(source==3||source==4){
String memadrs=register[3]+register[4];
Integer decimal_mem = Integer.parseInt(memadrs, 16);
A[decimal_mem]=register[0];
display();
txt_remark.append("\nAdress="+memadrs);
txt_remark.append("VALUE="+A[decimal_mem]);
}
if(source==5||source==6){
String memadrs=register[5]+register[6];
Integer decimal_mem = Integer.parseInt(memadrs, 16);
register[0]=A[decimal_mem];
txt_remark.append("\nAdress="+memadrs);
txt_remark.append("VALUE="+A[decimal_mem]);
display();
}
}
if(source==0||source==7){
txt_remark.append("\nSyntax error");
}
}
//INST-7 SHLD STORE HL PAIR IN MEMORY
if(s1.equalsIgnoreCase("SHLD")){
if(s2.length()>4){
txt_remark.append("\nInvalid address ");
}else{
try{
Integer decimal_mem = Integer.parseInt(s2, 16);
A[decimal_mem]=register[6];
A[decimal_mem+1]=register[5];
display();
txt_remark.append("\nAdress="+s2);
txt_remark.append("VALUE="+register[6]);
txt_remark.append("\nAdress="+Integer.toHexString(decimal_mem+1));
txt_remark.append("VALUE="+register[5]);
}
catch(NumberFormatException ne){
txt_remark.append("\nAdress was not hexdecimal");
}
}
}
//inst-8 XCHG H<-->D L<-->E
if(s1.equalsIgnoreCase("XCHG")){
String temp;
temp=register[3];
register[3]=register[5];
register[5]=temp;
temp=register[4];
register[4]=register[6];
register[6]=temp;
display();
}
//SPHL
if(s1.equalsIgnoreCase("SPHL")){
String memadrs=register[5]+register[6];
store_stack=memadrs;
display();
}
if(s1.equalsIgnoreCase("XTHL")){
String memadrs=store_stack;
Integer decimal_mem = Integer.parseInt(memadrs, 16);
register[5]=A[decimal_mem];
register[6]=A[decimal_mem+1];
display();
}
//PCHL
if(s1.equalsIgnoreCase("PCHL")){
String memadrs=register[5]+register[6];
store_pc=memadrs;
display();
}
// ADD R OR M
if(s1.equalsIgnoreCase("ADD")){
int source=whichregister(keyword,s2.charAt(0));
if(s2.charAt(0)=='M'){
String memadrs=register[5]+register[6];
Integer decimal_mem = Integer.parseInt(memadrs, 16);
Integer temp_a = Integer.parseInt(register[0], 16);
Integer temp_m = Integer.parseInt(A[decimal_mem], 16);
int result=temp_a+temp_m;
register[0]=Integer.toHexString(result);
if(register[0].length()>2){
carry=1;
}
display();
}if(source<8){
Integer temp_a = Integer.parseInt(register[0], 16);
Integer temp_m = Integer.parseInt(register[source], 16);
int result=temp_a+temp_m;
register[0]=Integer.toHexString(result);
if(register[0].length()>2){
carry=1;
}
display();
}
}
//ADC R AND M
if(s1.equalsIgnoreCase("ADC")){
int source=whichregister(keyword,s2.charAt(0));
if(s2.charAt(0)=='M'){
String memadrs=register[5]+register[6];
Integer decimal_mem = Integer.parseInt(memadrs, 16);
Integer temp_a = Integer.parseInt(register[0], 16);
Integer temp_m = Integer.parseInt(A[decimal_mem], 16);
int result=temp_a+temp_m+carry;
register[0]=Integer.toHexString(result);
if(carry==0){
carry=1;
}else{
carry=0;
}
display();
}if(source<8){
Integer temp_a = Integer.parseInt(register[0], 16);
Integer temp_m = Integer.parseInt(register[source], 16);
int result=temp_a+temp_m+carry;
register[0]=Integer.toHexString(result);
if(carry==0){
carry=1;
}else{
carry=0;
}
display();
}
}
// ADI INS
if(s1.equalsIgnoreCase("ADI")){
if(s2.length()>2){
txt_remark.setText("invalid address");
}else{
txt_remark.setText(s2);
// register[0]="0";
Integer decimal_mem = Integer.parseInt(s2, 16);
Integer decimal_a = Integer.parseInt(register[0], 16);
decimal_a=decimal_a+decimal_mem;
register[0]=Integer.toHexString(decimal_a);
txt_remark.append(Integer.toHexString(decimal_a));
if(register[0].length()>2){
carry=1;
}
display();
}
}
// ACI INS
if(s1.equalsIgnoreCase("ACI")){
if(s2.length()>2){
txt_remark.setText("invalid address");
}else{
txt_remark.setText(s2);
//register[0]="0";
Integer decimal_mem = Integer.parseInt(s2, 16);
Integer decimal_a = Integer.parseInt(register[0], 16);
decimal_a=decimal_a+decimal_mem+carry;
register[0]=Integer.toHexString(decimal_a);
txt_remark.append(Integer.toHexString(decimal_a));
if(carry==0){
carry=1;
}else{
carry=0;
}
if(register[0].length()>2){
carry=1;
}
display();
}
}
//DAD
//
//SUB
if(s1.equalsIgnoreCase("SUB")){
int source=whichregister(keyword,s2.charAt(0));
if(s2.charAt(0)=='M'){
String memadrs=register[5]+register[6];
Integer decimal_mem = Integer.parseInt(memadrs, 16);
Integer temp_a = Integer.parseInt(register[0], 16);
Integer temp_m = Integer.parseInt(A[decimal_mem], 16);
int result=temp_a-temp_m;
register[0]=Integer.toHexString(result);
if(result<0){
carry=1;
}
display();
}if(source<8){
Integer temp_a = Integer.parseInt(register[0], 16);
Integer temp_m = Integer.parseInt(register[source], 16);
int result=temp_a-temp_m;
register[0]=Integer.toHexString(result);
if(result<0){
carry=1;
sign=1;
}
display();
}
}
//SBB
if(s1.equalsIgnoreCase("SBB")){
int source=whichregister(keyword,s2.charAt(0));
if(s2.charAt(0)=='M'){
String memadrs=register[5]+register[6];
Integer decimal_mem = Integer.parseInt(memadrs, 16);
Integer temp_a = Integer.parseInt(register[0], 16);
Integer temp_m = Integer.parseInt(A[decimal_mem], 16);
int result=temp_a-temp_m-carry;
register[0]=Integer.toHexString(result);
if(carry==0){
carry=1;
}else{
carry=0;
}
display();
}if(source<8){
Integer temp_a = Integer.parseInt(register[0], 16);
Integer temp_m = Integer.parseInt(register[source], 16);
int result=temp_a-temp_m-carry;
register[0]=Integer.toHexString(result);
if(carry==0){
carry=1;
}else{
carry=0;
}
display();
}
}
//SUI
if(s1.equalsIgnoreCase("SUI")){
if(s2.length()>2){
txt_remark.setText("invalid address");
}else{
txt_remark.setText(s2);
// register[0]="0";
Integer decimal_mem = Integer.parseInt(s2, 16);
Integer decimal_a = Integer.parseInt(register[0], 16);
decimal_a=decimal_a-decimal_mem;
register[0]=Integer.toHexString(decimal_a);
txt_remark.append(Integer.toHexString(decimal_a));
if(decimal_a<0){
sign=1;
carry=1;
}
if(decimal_a==0){
zero=1;
}
display();
}
}
//SBI
if(s1.equalsIgnoreCase("SBI")){
if(s2.length()>2){
txt_remark.setText("invalid address");
}else{
txt_remark.setText(s2);
//register[0]="0";
Integer decimal_mem = Integer.parseInt(s2, 16);
Integer decimal_a = Integer.parseInt(register[0], 16);
decimal_a=decimal_a-decimal_mem-carry;
register[0]=Integer.toHexString(decimal_a);
txt_remark.append(Integer.toHexString(decimal_a));
if(carry==0){
carry=1;
}else{
carry=0;
}
if(decimal_a<0){
carry=1;
sign=1;
}
if(decimal_a==0){
zero=0;
}
display();
}
}
//INR increment function
if(s1.equalsIgnoreCase("INR")){
int errorcase1=search(keyword,s2.charAt(0));
if(errorcase1==0){
txt_remark.setText("Sysntax error \n pls provide valid register or memory");
}
if(s2.charAt(0)=='M'){
String memadrs=register[5]+register[6];
Integer decimal_mem = Integer.parseInt(memadrs, 16);
Integer temp_m = Integer.parseInt(A[decimal_mem], 16);
temp_m=temp_m+1;
A[decimal_mem]=Integer.toHexString(temp_m);
display();
txt_remark.append("\nAddress="+memadrs);
txt_remark.append(" value="+A[decimal_mem]);
}
int source=whichregister(keyword,s2.charAt(0));
if(source>=0&&source<=6){
Integer temp_m = Integer.parseInt(register[source], 16);
temp_m=temp_m+1;
register[source]=Integer.toHexString(temp_m);
display();
}
}
//INX INCREASE REGISTER PAIR
if(s1.equalsIgnoreCase("INX")){
int errorcase1=search(keyword,s2.charAt(0));
if(s2.charAt(0)=='M'||errorcase1==0){
txt_remark.setText("Syntax error");
}
int source=whichregister(keyword,s2.charAt(0));
if(source==1||source==2){
String memadrs=register[1]+register[2];
Integer temp_m = Integer.parseInt(memadrs, 16);
temp_m=temp_m+1;
register[1]=Integer.toHexString(temp_m).substring(0,2);
register[2]=Integer.toHexString(temp_m).substring(2,4);
display();
}
if(source==3||source==4){
String memadrs=register[3]+register[4];
Integer temp_m = Integer.parseInt(memadrs, 16);
temp_m=temp_m+1;
register[3]=Integer.toHexString(temp_m).substring(0,2);
register[4]=Integer.toHexString(temp_m).substring(2,4);
display();
}
if(source==5||source==6){
String memadrs=register[5]+register[6];
Integer temp_m = Integer.parseInt(memadrs, 16);
temp_m=temp_m+1;
register[5]=Integer.toHexString(temp_m).substring(0,2);
register[6]=Integer.toHexString(temp_m).substring(2,4);
display();
}
}
//DECREMENT
if(s1.equalsIgnoreCase("DCR")){
int errorcase1=search(keyword,s2.charAt(0));
if(errorcase1==0){
txt_remark.setText("Sysntax error \n pls provide valid register or memory");
}
if(s2.charAt(0)=='M'){
String memadrs=register[5]+register[6];
Integer decimal_mem = Integer.parseInt(memadrs, 16);
Integer temp_m = Integer.parseInt(A[decimal_mem], 16);
temp_m=temp_m-1;
A[decimal_mem]=Integer.toHexString(temp_m);
display();
txt_remark.append("\nAddress="+memadrs);
txt_remark.append(" value="+A[decimal_mem]);
}
int source=whichregister(keyword,s2.charAt(0));
if(source>=0&&source<=6){
Integer temp_m = Integer.parseInt(register[source], 16);
temp_m=temp_m-1;
register[source]=Integer.toHexString(temp_m);
display();
}
}
//INX INCREASE REGISTER PAIR
if(s1.equalsIgnoreCase("DCX")){
int errorcase1=search(keyword,s2.charAt(0));
if(s2.charAt(0)=='M'||errorcase1==0){
txt_remark.setText("Syntax error");
}
int source=whichregister(keyword,s2.charAt(0));
if(source==1||source==2){
String memadrs=register[1]+register[2];
Integer temp_m = Integer.parseInt(memadrs, 16);
temp_m=temp_m-1;
register[1]=Integer.toHexString(temp_m).substring(0,2);
register[2]=Integer.toHexString(temp_m).substring(2,4);
display();
}
if(source==3||source==4){
String memadrs=register[3]+register[4];
Integer temp_m = Integer.parseInt(memadrs, 16);
temp_m=temp_m-1;
register[3]=Integer.toHexString(temp_m).substring(0,2);
register[4]=Integer.toHexString(temp_m).substring(2,4);
display();
}
if(source==5||source==6){
String memadrs=register[5]+register[6];
Integer temp_m = Integer.parseInt(memadrs, 16);
temp_m=temp_m-1;
register[5]=Integer.toHexString(temp_m).substring(0,2);
register[6]=Integer.toHexString(temp_m).substring(2,4);
display();
}
}
//SET CARRY FLAG TO 1
if(s1.equalsIgnoreCase("STC")){
carry=1;
display();
}
//complemeny carry flag
if(s1.equalsIgnoreCase("CMC")){
if(carry==1){
carry=0;
display();
}else
{
carry=1;
display();
}
}
if(s1.equalsIgnoreCase("CMP")){
int errorcase1=search(keyword,s2.charAt(0));
int source=whichregister(keyword,s2.charAt(0));
if(errorcase1==0){
txt_remark.setText("Syntax error");
}
if(s2.charAt(0)=='M'){
String memadrs=register[5]+register[6];
Integer decimal_mem = Integer.parseInt(memadrs, 16);
Integer temp_m = Integer.parseInt(A[decimal_mem], 16);
Integer temp_a = Integer.parseInt(register[0], 16);
if(temp_a==temp_m){
carry=0;zero=1;
display();
}
if(temp_a<temp_m){
carry=1;zero=0;
display();
}
if(temp_a>temp_m){
carry=0;zero=0;
display();
}
}
if(source>=0&&source<=6){
Integer temp_r = Integer.parseInt(register[source], 16);
Integer temp_a = Integer.parseInt(register[0], 16);
if(temp_a==temp_r){
carry=0;zero=1;
display();
}
if(temp_a<temp_r){
carry=1;zero=0;
display();
}
if(temp_a>temp_r){
carry=0;zero=0;
display();
}
}
}
if(s1.equalsIgnoreCase("HLT")){
display();
}
if(s1.length()>4){
txt_remark.setText("Syntax error \n this instruction is not included pls contact shaharyar shauat");
}
}
//ends
//SEARCH FUNCTION
public int search(char schar[], char sch){
int found=0;
for(int si=0; si<schar.length;si++){
if(sch==schar[si]){
found=1;
}
}
return found;
}
//SEARCH ENDS HERE
//which register
public int whichregister(char schar[], char sch){
int whchreg=8;
for(int si=0;si<7;si++){
if(sch==schar[si]){
whchreg=si;
}
}
return whchreg;
}
//ends here
// display function
public void display(){
txt_remark.setText("");
txt_remark.append("No error");
txt_remark.append("\nA="+register[0]);
txt_remark.append("\nB="+register[1]);txt_remark.append(" C="+register[2]);
txt_remark.append("\nD="+register[3]);txt_remark.append(" E="+register[4]);
txt_remark.append("\nH="+register[5]);txt_remark.append(" L="+register[6]);
Tex_Acc.setText(register[0]);
Tex_Reg_B.setText(register[1]);
Tex_Reg_C.setText(register[2]);
Tex_Reg_D.setText(register[3]);
Tex_Reg_E.setText(register[4]);
Tex_Reg_H.setText(register[5]);
Tex_Reg_L.setText(register[6]);
Tex_cF.setText(String.valueOf(carry));
Tex_sF.setText(String.valueOf(sign));
Tex_zF.setText(String.valueOf(zero));
Tex_pF.setText(String.valueOf(paritory));
Tex_Reg_Stack.setText(store_stack);
Tex_Pro_Coun.setText(store_pc);
}
//ends here
//all zero initialization of memory and register
public static void all_zero_initialization(){
for(int i=0;i<65536;i++){
A[i]=String.valueOf(0);
}
for(int i=0;i<7;i++){
register[i]=String.valueOf(0);
}
carry=0;sign=0;zero=0;
paritory=0;
}
//
public static void main (String args[]){
new emulator();
}
}
how to enter the file in gui so that we an get appropiate output.
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