Mercurial > vba-clojure

     1 package com.aurellem.gb;

     2 

     3 import java.nio.ByteBuffer;

     4 import java.nio.IntBuffer;

     5 import java.nio.ByteOrder;

     6 

     7 public class Gb {

     8  

     9     

    10     public Gb(){}

    11 

    12 

    13     /** 

    14      * Hello World! This is just to test the native interface.

    15      */

    16     public static native void sayHello();

    17     

    18     /** 

    19      * Run the emulator on a given rom

    20      * @param rom - the name of the rom.

    21      */

    22     public static native void startEmulator(String rom);

    23     

    24     public static void loadVBA(){

    25 	System.loadLibrary("vba");

    26     }

    27 

    28     public static native void step();

    29     

    30     public static native int ntick();

    31 

    32     public static boolean tick(){

    33 	return (1 == ntick());

    34     }

    35 

    36     public static native void nstep(int keymask);

    37 

    38     public static void step(int keymask){

    39 	if (-1 == keymask) {step();}

    40 	else {nstep(keymask);}}

    41 

    42     public static native void shutdown();

    43 

    44     public static native long saveState(ByteBuffer buffer, int size);

    45 

    46     public static native void loadState(ByteBuffer buffer, int size);

    47 

    48     public static final int MAX_SAVE_SIZE = 20000;

    49 

    50     public static ByteBuffer createDirectByteBuffer(int capacity){

    51 	byte[] zeros = new byte[capacity];

    52 	ByteBuffer buf = 

    53 	    ByteBuffer.allocateDirect(capacity)

    54 	              .order(ByteOrder.nativeOrder());

    55 	buf.put(zeros);

    56 	buf.clear();

    57 	return buf;

    58     }

    59 

    60     public static ByteBuffer saveBuffer(){

    61 	return createDirectByteBuffer(MAX_SAVE_SIZE);

    62     }

    63 

    64     public static ByteBuffer saveState(){

    65 	ByteBuffer buf = saveBuffer();

    66 	

    67 	saveState(buf, buf.capacity());

    68 	

    69 	// determine the extent of the saved data

    70 	int position = buf.capacity() - 1;

    71 	for (int i = position; i > 0; i--){

    72 	    if (0 != buf.get(i)){

    73 		position = i;

    74 		break;

    75 	    }}

    76 	byte[] saveArray = new byte[position];

    77 	ByteBuffer save = createDirectByteBuffer(position);

    78 	buf.get(saveArray, 0 , position);

    79 	save.put(saveArray);

    80 	save.rewind();

    81 	return save;

    82     }

    83 

    84     public static void loadState(ByteBuffer saveState){

    85 	loadState(saveState, MAX_SAVE_SIZE);

    86     }

    87 

    88     public static native int getROMSize();

    89     public static native int getRAMSize();

    90     

    91 

    92     public static final int WRAM_SIZE = 0x8000;

    93 

    94     public static final int VRAM_SIZE = 0x4000;

    95     

    96     public static final int RAM_SIZE = 0x8000;

    97     

    98     public static final int ROM_SIZE = 0x100000;

    99 

   100     public static final int NUM_REGISTERS = 29;

   101 

   102     public static final int GB_MEMORY = 0x10000;

   103 

   104     public static native void getMemory(int[] store);

   105 

   106     public static native void writeMemory(int[] newMemory);

   107 

   108     public static native void getRAM(int[] store);

   109 

   110     public static native void getROM(int[] store);

   111 

   112     public static native void writeROM(int[] newROM);

   113 

   114     public static native void getWRAM(int[] store);

   115 

   116     public static native void getVRAM(int[] store);

   117     

   118     public static native void getRegisters(int[] store);

   119     

   120     public static native void writeRegisters(int[] newRegisters);

   121 

   122 }
author	Robert McIntyre <rlm@mit.edu>
date	Mon, 26 Mar 2012 23:34:53 -0500
parents	893c753f8088
children	09b3bc0b71b5