Mercurial > vba-clojure
view java/src/com/aurellem/gb/Gb.java @ 407:03ade2a04458
Astoundingly, it is not generally possible to convert decimal representations into hexadecimal simply by prepending 0x.
author | Dylan Holmes <ocsenave@gmail.com> |
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date | Thu, 12 Apr 2012 22:30:03 -0500 |
parents | 893c753f8088 |
children | 09b3bc0b71b5 |
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1 package com.aurellem.gb;3 import java.nio.ByteBuffer;4 import java.nio.IntBuffer;5 import java.nio.ByteOrder;7 public class Gb {10 public Gb(){}13 /**14 * Hello World! This is just to test the native interface.15 */16 public static native void sayHello();18 /**19 * Run the emulator on a given rom20 * @param rom - the name of the rom.21 */22 public static native void startEmulator(String rom);24 public static void loadVBA(){25 System.loadLibrary("vba");26 }28 public static native void step();30 public static native int ntick();32 public static boolean tick(){33 return (1 == ntick());34 }36 public static native void nstep(int keymask);38 public static void step(int keymask){39 if (-1 == keymask) {step();}40 else {nstep(keymask);}}42 public static native void shutdown();44 public static native long saveState(ByteBuffer buffer, int size);46 public static native void loadState(ByteBuffer buffer, int size);48 public static final int MAX_SAVE_SIZE = 20000;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 }60 public static ByteBuffer saveBuffer(){61 return createDirectByteBuffer(MAX_SAVE_SIZE);62 }64 public static ByteBuffer saveState(){65 ByteBuffer buf = saveBuffer();67 saveState(buf, buf.capacity());69 // determine the extent of the saved data70 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 }84 public static void loadState(ByteBuffer saveState){85 loadState(saveState, MAX_SAVE_SIZE);86 }88 public static native int getROMSize();89 public static native int getRAMSize();92 public static final int WRAM_SIZE = 0x8000;94 public static final int VRAM_SIZE = 0x4000;96 public static final int RAM_SIZE = 0x8000;98 public static final int ROM_SIZE = 0x100000;100 public static final int NUM_REGISTERS = 29;102 public static final int GB_MEMORY = 0x10000;104 public static native void getMemory(int[] store);106 public static native void writeMemory(int[] newMemory);108 public static native void getRAM(int[] store);110 public static native void getROM(int[] store);112 public static native void writeROM(int[] newROM);114 public static native void getWRAM(int[] store);116 public static native void getVRAM(int[] store);118 public static native void getRegisters(int[] store);120 public static native void writeRegisters(int[] newRegisters);122 }