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annotate java/src/com/aurellem/gb/Gb.java @ 96:cb487c4ce5c0

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added write-memory!, which allows me to write any value to the gameboy's memory-mapped rom or ram.
author Robert McIntyre <rlm@mit.edu>
date Sun, 11 Mar 2012 23:27:19 -0500
parents 4c60ebca1a9d
children 2090bcb78f44
rev   line source
rlm@43 1 package com.aurellem.gb;
rlm@43 2
rlm@43 3 import java.nio.ByteBuffer;
rlm@60 4 import java.nio.IntBuffer;
rlm@56 5 import java.nio.ByteOrder;
rlm@43 6
rlm@43 7 public class Gb {
rlm@43 8
rlm@43 9
rlm@43 10 public Gb(){}
rlm@43 11
rlm@43 12
rlm@43 13 /**
rlm@43 14 * Hello World! This is just to test the native interface.
rlm@43 15 */
rlm@48 16 public static native void sayHello();
rlm@43 17
rlm@43 18 /**
rlm@43 19 * Run the emulator on a given rom
rlm@43 20 * @param rom - the name of the rom.
rlm@43 21 */
rlm@48 22 public static native void startEmulator(String rom);
rlm@48 23
rlm@48 24
rlm@48 25 public static void loadVBA(){
rlm@48 26 System.loadLibrary("vba");
rlm@48 27 }
rlm@43 28
rlm@53 29 public static native void step();
rlm@92 30
rlm@92 31 public static native int ntick();
rlm@92 32
rlm@92 33 public static boolean tick(){
rlm@92 34 return (1 == ntick());
rlm@92 35 }
rlm@53 36
rlm@83 37 public static native void nstep(int keymask);
rlm@83 38
rlm@83 39 public static void step(int keymask){
rlm@83 40 if (-1 == keymask) {step();}
rlm@83 41 else {nstep(keymask);}}
rlm@55 42
rlm@53 43 public static native void shutdown();
rlm@50 44
rlm@76 45 public static native long saveState(ByteBuffer buffer, int size);
rlm@56 46
rlm@56 47 public static native void loadState(ByteBuffer buffer, int size);
rlm@56 48
rlm@80 49 public static final int MAX_SAVE_SIZE = 20000;
rlm@56 50
rlm@76 51 public static ByteBuffer createDirectByteBuffer(int capacity){
rlm@76 52 byte[] zeros = new byte[capacity];
rlm@56 53 ByteBuffer buf =
rlm@76 54 ByteBuffer.allocateDirect(capacity)
rlm@56 55 .order(ByteOrder.nativeOrder());
rlm@76 56 buf.put(zeros);
rlm@56 57 buf.clear();
rlm@56 58 return buf;
rlm@56 59 }
rlm@56 60
rlm@76 61 public static ByteBuffer saveBuffer(){
rlm@76 62 return createDirectByteBuffer(MAX_SAVE_SIZE);
rlm@76 63 }
rlm@76 64
rlm@76 65 public static ByteBuffer saveState(){
rlm@76 66 ByteBuffer buf = saveBuffer();
rlm@76 67
rlm@76 68 saveState(buf, buf.capacity());
rlm@76 69
rlm@76 70 // determine the extent of the saved data
rlm@76 71 int position = buf.capacity() - 1;
rlm@76 72 for (int i = position; i > 0; i--){
rlm@76 73 if (0 != buf.get(i)){
rlm@76 74 position = i;
rlm@76 75 break;
rlm@76 76 }}
rlm@76 77 byte[] saveArray = new byte[position];
rlm@76 78 ByteBuffer save = createDirectByteBuffer(position);
rlm@76 79 buf.get(saveArray, 0 , position);
rlm@76 80 save.put(saveArray);
rlm@76 81 save.rewind();
rlm@76 82 return save;
rlm@76 83 }
rlm@76 84
rlm@56 85 public static void loadState(ByteBuffer saveState){
rlm@76 86 loadState(saveState, MAX_SAVE_SIZE);
rlm@56 87 }
rlm@56 88
rlm@59 89 public static native int getROMSize();
rlm@59 90 public static native int getRAMSize();
rlm@59 91
rlm@59 92
rlm@59 93 public static final int WRAM_SIZE = 0x8000;
rlm@59 94
rlm@59 95 public static final int VRAM_SIZE = 0x4000;
rlm@93 96
rlm@93 97 public static final int RAM_SIZE = 0x8000;
rlm@93 98
rlm@93 99 public static final int ROM_SIZE = 0x100000;
rlm@59 100
rlm@62 101 public static final int NUM_REGISTERS = 27;
rlm@62 102
rlm@93 103 public static final int GB_MEMORY = 0x10000;
rlm@93 104
rlm@93 105 public static native void getMemory(int[] store);
rlm@93 106
rlm@96 107 public static native void writeMemory(int[] newMemory);
rlm@96 108
rlm@60 109 public static native void getRAM(int[] store);
rlm@59 110
rlm@60 111 public static native void getROM(int[] store);
rlm@59 112
rlm@60 113 public static native void getWRAM(int[] store);
rlm@60 114
rlm@60 115 public static native void getVRAM(int[] store);
rlm@62 116
rlm@62 117 public static native void getRegisters(int[] store);
rlm@43 118 }