sdcc-extra/emu/rose/ConsoleZ80.java

   1 import java.awt.*;
   2 import java.util.*;
   3 import java.io.*;
   4 import java.net.*;
   5
   6 /** Implements a Z80 with 64k RAM and a write-only console at IO port 0.
   7     @author Michael Hope <michaelh@juju.net.nz> 2001
   8     @see Z80
   9 */
  10 public class ConsoleZ80
  11     extends Z80
  12     implements Runnable
  13 {
  14     String romImageName = null;
  15
  16     boolean isWatched[];
  17
  18     public ConsoleZ80(String _romImageName) {
  19         super(4.0, 1);
  20         romImageName = _romImageName;
  21         isWatched = new boolean[65536];
  22     }
  23
  24     public ConsoleZ80() {
  25         this(null);
  26     }
  27
  28     public void setImageName(String name) {
  29         romImageName = name;
  30     }
  31
  32     /** Byte access */
  33     public int peekb( int addr ) {
  34         //        System.out.println("Read from " + addr + " of " + mem[addr]);
  35         return mem[ addr ];
  36     }
  37
  38     public void pokeb( int addr, int newByte ) {
  39         if (isWatched[addr]) {
  40             System.out.println("watch: write to 0x" + Integer.toString(addr, 16) + " at pc 0x" + Integer.toString(PC(), 16));
  41         }
  42         mem[ addr ] = newByte;
  43     }
  44
  45     public int inb( int port ) {
  46         return 0xff;
  47     }
  48
  49     public void outb( int port, int outByte, int tstates ) {
  50         switch (port) {
  51         case 0xFF:
  52             System.out.write(outByte);
  53             System.out.flush();
  54             break;
  55         case 1:
  56             switch (outByte) {
  57             case 0:
  58                 System.exit(0);
  59                 break;
  60             }
  61         }
  62     }
  63
  64     public void loadROM( String name, InputStream is ) throws Exception {
  65         readBytes(is, mem, 32768);
  66     }
  67
  68     int rst(int num) {
  69         if (num == 8) {
  70             switch (A()) {
  71             case 0:
  72                 System.exit(0);
  73                 break;
  74             case 1:
  75                 System.out.write(L());
  76                 System.out.flush();
  77                 break;
  78             default:
  79                 // Drop.
  80             }
  81             return 0;
  82         }
  83         else {
  84             return super.rst(num);
  85         }
  86     }
  87
  88     private int readBytes( InputStream is, int a[], int n ) throws Exception {
  89         try {
  90             byte buff[] = new byte[ n ];
  91             int toRead = n;
  92             while ( toRead > 0 ) {
  93                 int nRead = is.read(buff, n-toRead, toRead);
  94                 toRead -= nRead;
  95             }
  96             for ( int i = 0; i < n; i++ ) {
  97                 a[i] = (buff[i]+256)&0xff;
  98             }
  99
 100             return n;
 101         }
 102         catch ( Exception e ) {
 103             return -1;
 104         }
 105     }
 106
 107     /** Start the applet creating a new thread which invokes run(). */
 108     public void start() throws Exception {
 109         Thread thread = new Thread(this, "ConsoleZ80");
 110         thread.start();
 111     }
 112
 113     /** Read applet parameters and start the Rex. */
 114     public void run() {
 115         try {
 116             FileInputStream rom = new FileInputStream(romImageName);
 117             loadROM(romImageName, rom);
 118             rom.close();
 119             reset();
 120             execute();
 121         } catch (Exception e) {
 122             System.out.println("readParameters: " +e.toString());
 123         }
 124     }
 125
 126     public void addWatch(String addr) {
 127         try {
 128             isWatched[Integer.valueOf(addr).intValue()] = true;
 129         } catch (NumberFormatException ignored) {};
 130     }
 131
 132     public static void main(String[] args) throws Exception {
 133         boolean setImage = false;
 134         ConsoleZ80 z80 = new ConsoleZ80();
 135
 136         for (int i=0; i<args.length; i++) {
 137             if (args[i].equals("-w")) {
 138                 z80.addWatch(args[++i]);
 139             }
 140             else if (args[i].equals("-h")) {
 141                 System.out.println("Usage: java ConsoleZ80 [romimage]");
 142                 System.exit(0);
 143             }
 144             else {
 145                 z80.setImageName(args[i]);
 146                 setImage = true;
 147             }
 148         }
 149         if (!setImage) {
 150             z80.setImageName("test.gb");
 151         }
 152         z80.start();
 153     }
 154
 155 }