annotate java/src/com/aurellem/gb/Gb.java @ 84:26f002f2868c

better functional version of earlier code
author Robert McIntyre <rlm@mit.edu>
date Fri, 09 Mar 2012 23:28:07 -0600
parents 95cb2152d7cd
children 1ff2c546f5ad
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@53 30
rlm@83 31 public static native void nstep(int keymask);
rlm@83 32
rlm@83 33 public static void step(int keymask){
rlm@83 34 if (-1 == keymask) {step();}
rlm@83 35 else {nstep(keymask);}}
rlm@55 36
rlm@53 37 public static native void shutdown();
rlm@50 38
rlm@76 39 public static native long saveState(ByteBuffer buffer, int size);
rlm@56 40
rlm@56 41 public static native void loadState(ByteBuffer buffer, int size);
rlm@56 42
rlm@80 43 public static final int MAX_SAVE_SIZE = 20000;
rlm@56 44
rlm@76 45 public static ByteBuffer createDirectByteBuffer(int capacity){
rlm@76 46 byte[] zeros = new byte[capacity];
rlm@56 47 ByteBuffer buf =
rlm@76 48 ByteBuffer.allocateDirect(capacity)
rlm@56 49 .order(ByteOrder.nativeOrder());
rlm@76 50 buf.put(zeros);
rlm@56 51 buf.clear();
rlm@56 52 return buf;
rlm@56 53 }
rlm@56 54
rlm@76 55 public static ByteBuffer saveBuffer(){
rlm@76 56 return createDirectByteBuffer(MAX_SAVE_SIZE);
rlm@76 57 }
rlm@76 58
rlm@76 59 public static ByteBuffer saveState(){
rlm@76 60 ByteBuffer buf = saveBuffer();
rlm@76 61
rlm@76 62 saveState(buf, buf.capacity());
rlm@76 63
rlm@76 64 // determine the extent of the saved data
rlm@76 65 int position = buf.capacity() - 1;
rlm@76 66 for (int i = position; i > 0; i--){
rlm@76 67 if (0 != buf.get(i)){
rlm@76 68 position = i;
rlm@76 69 break;
rlm@76 70 }}
rlm@76 71 byte[] saveArray = new byte[position];
rlm@76 72 ByteBuffer save = createDirectByteBuffer(position);
rlm@76 73 buf.get(saveArray, 0 , position);
rlm@76 74 save.put(saveArray);
rlm@76 75 save.rewind();
rlm@76 76 return save;
rlm@76 77 }
rlm@76 78
rlm@56 79 public static void loadState(ByteBuffer saveState){
rlm@76 80 loadState(saveState, MAX_SAVE_SIZE);
rlm@56 81 }
rlm@56 82
rlm@59 83 public static native int getROMSize();
rlm@59 84 public static native int getRAMSize();
rlm@59 85
rlm@59 86
rlm@59 87 public static final int WRAM_SIZE = 0x8000;
rlm@59 88
rlm@59 89 public static final int VRAM_SIZE = 0x4000;
rlm@59 90
rlm@62 91 public static final int NUM_REGISTERS = 27;
rlm@62 92
rlm@60 93 public static native void getRAM(int[] store);
rlm@59 94
rlm@60 95 public static native void getROM(int[] store);
rlm@59 96
rlm@60 97 public static native void getWRAM(int[] store);
rlm@60 98
rlm@60 99 public static native void getVRAM(int[] store);
rlm@62 100
rlm@62 101 public static native void getRegisters(int[] store);
rlm@43 102 }