/// <summary>
/// Updates pointers to the newly patched PPU loader.
/// </summary>
private void UpdateMiscPointers(AddressLabels labels)
{
////int InitTitleGFX = 0xC603;
////Prg_WriteWord(0xC54D, InitTitleGFX); // Update jsr InitTitleGFX
////Prg_WriteWord(0xC573, 0xC608); // Update jsr InitBrinstarGFX
////Prg_WriteWord(0xC58B, 0xC60d); // Update jsr InitNorfairGFX
////Prg_WriteWord(0xC5A3, 0xC612); // Update jsr InitTourianGFX
////Prg_WriteWord(0xC5BE, 0xC617); // Update jsr InitKraidGFX
////Prg_WriteWord(0xC5CB, 0xC61C); // Update jsr InitRidleyGFX
////Prg_WriteWord(0xC5D5, InitTitleGFX); // Update jsr InitGFX6
// Todo: with support for .PATCH, this can actually be done via the ASM
WriteLabel(0xC54D, labels, "InitTitleGFX");
WriteLabel(0xC573, labels, "InitBrinstarGFX"); // Update jsr InitBrinstarGFX
WriteLabel(0xC58B, labels, "InitNorfairGFX"); // Update jsr InitNorfairGFX
WriteLabel(0xC5A3, labels, "InitTourianGFX"); // Update jsr InitTourianGFX
WriteLabel(0xC5BE, labels, "InitKraidGFX"); // Update jsr InitKraidGFX
WriteLabel(0xC5CB, labels, "InitRidleyGFX"); // Update jsr InitRidleyGFX
WriteLabel(0xC54D, labels, "InitTitleGFX");
////// Update jsr InitGFX7 (called 3 times in title page bank: title, password, end of game)
////enhancedRomData[0x1135] = (byte)(InitTitleGFX & 0xFF);
////enhancedRomData[0x1136] = (byte)(InitTitleGFX >> 8);
////enhancedRomData[0x1378] = (byte)(InitTitleGFX & 0xFF);
////enhancedRomData[0x1379] = (byte)(InitTitleGFX >> 8);
////enhancedRomData[0x13B9] = (byte)(InitTitleGFX & 0xFF);
////enhancedRomData[0x13BA] = (byte)(InitTitleGFX >> 8);
WriteLabel(0, 0x9125, labels, "InitTitleGFX");
WriteLabel(0, 0x9368, labels, "InitTitleGFX");
WriteLabel(0, 0x93A9, labels, "InitTitleGFX");
}
private void PreformRoomAsmPatch()
{
var labels = new AddressLabels();
var Asm = EnhancerResources.RoomDataHack;
var assembler = new Assembler("RoomDataHack", Asm, StandardFileSystem.FileSystem)
{
Labels = labels
};
var bin = assembler.Assemble();
var errors = assembler.GetErrors();
if (errors.Count > 0)
{
throw new EnhancerException("Room data hack ASM patch failed to assemble with " + errors.Count.ToString() + " errors. First error: " + errors[0].Message + " on line " + errors[0].LineNumber.ToString());
}
var patches = assembler.GetPatchSegments();
for (int i = 0; i < patches.Count; i++)
{
var patch = patches[i];
Array.Copy(bin, patch.Start, enhancedRomData, patch.PatchOffset, patch.Length);
}
}
private void PerformAsmPatches()
{
{ // First try
////// Pre-assembled code
////var ppuLoaderAsm = EnhancerResources.PPU_Loader;
////var NmiHijackAsm = EnhancerResources.NMI_Hijack;
////// Apply ASM patches
////Array.Copy(ppuLoaderAsm, 0, enhancedRomData, PpuLoader_Offset, ppuLoaderAsm.Length);
////Array.Copy(NmiHijackAsm, 0, enhancedRomData, NmiHijack_Offset, NmiHijackAsm.Length);
////enhancedRomData[ChrSwapSize_Offset] |= ChrSwapMode_4k;
////// Patch pointers to updated routines
////UpdateMiscPointers();
}
{ // Second try
////// ASM patches
////var ppuLoaderSource = EnhancerResources.PpuLoader_ASM;
////var assm = new Assembler("Ppu Loader", ppuLoaderSource, StandardFileSystem.FileSystem);
////var ppuLoaderAsm = assm.Assemble();
////var nmiHijockSource = EnhancerResources.NmiHijack_ASM_unused;
////assm = new Assembler("NMI Hijack", nmiHijockSource, StandardFileSystem.FileSystem);
////var NmiHijackAsm = assm.Assemble();
////// Patch pointers to updated routines
////UpdateMiscPointers();
}
var labels = new AddressLabels();
var ppuLoaderAsm = EnhancerResources.PpuLoader_ASM;
var assembler = new Assembler("PPU Loader", ppuLoaderAsm, StandardFileSystem.FileSystem);
assembler.Labels = labels;
var bin = assembler.Assemble();
var errors = assembler.GetErrors();
if (errors.Count > 0)
{
throw new EnhancerException("PPU Loader ASM patch failed to assemble with " + errors.Count.ToString() + " errors. First error: " + errors[0].Message + " on line " + errors[0].LineNumber.ToString());
}
var patches = assembler.GetPatchSegments();
for (int i = 0; i < patches.Count; i++)
{
var patch = patches[i];
Array.Copy(bin, patch.Start, enhancedRomData, patch.PatchOffset, patch.Length);
}
// Patch pointers to updated routines
UpdateMiscPointers(labels);
FixCreditsPatternUsage();
}
private ushort?TryGetLabelValue(AddressLabels labels, string labelName)
{
const int fixedBank = 0x0F;
var bank = (BankLabels)labels.Banks[fixedBank];
foreach (var label in bank.Labels)
{
// Key is address
// Value contains name
if (label.Value.labelName.Equals(labelName, StringComparison.Ordinal))
{
return(label.Key);
}
}
return(null);
}
/// <summary>Writes a pointer to the specified address in the specified bank.</summary>
private void WriteLabel(int bank, int ptrAddress, AddressLabels labels, string labelName)
{
const int ptrFilter = 0x3FFF;
ushort?labelValue = TryGetLabelValue(labels, labelName);
int bankOffset = 0x10 + 0x4000 * bank;
if (labelValue == null)
{
throw new EnhancerException("The label \"" + labelName + "\" was not found in the applied ASM patch.");
}
else
{
ptrAddress = (ptrAddress & ptrFilter) + bankOffset;
enhancedRomData[ptrAddress] = (byte)(labelValue.Value);
enhancedRomData[ptrAddress + 1] = (byte)(labelValue.Value >> 8);
}
}
/////// <summary>
/////// Updates pointers to the newly patched PPU loader.
/////// </summary>
////private void UpdateMiscPointers() { // Done: comment out this unneeded method
//// int InitTitleGFX = 0xC603;
//// Prg_WriteWord(0xC54D, InitTitleGFX); // Update jsr InitTitleGFX
//// Prg_WriteWord(0xC573, 0xC608); // Update jsr InitBrinstarGFX
//// Prg_WriteWord(0xC58B, 0xC60d); // Update jsr InitNorfairGFX
//// Prg_WriteWord(0xC5A3, 0xC612); // Update jsr InitTourianGFX
//// Prg_WriteWord(0xC5BE, 0xC617); // Update jsr InitKraidGFX
//// Prg_WriteWord(0xC5CB, 0xC61C); // Update jsr InitRidleyGFX
//// Prg_WriteWord(0xC5D5, InitTitleGFX); // Update jsr InitGFX6
//// // Update jsr InitGFX7 (called 3 times in title page bank: title, password, end of game)
//// enhancedRomData[0x1135] = (byte)(InitTitleGFX & 0xFF);
//// enhancedRomData[0x1136] = (byte)(InitTitleGFX >> 8);
//// enhancedRomData[0x1378] = (byte)(InitTitleGFX & 0xFF);
//// enhancedRomData[0x1379] = (byte)(InitTitleGFX >> 8);
//// enhancedRomData[0x13B9] = (byte)(InitTitleGFX & 0xFF);
//// enhancedRomData[0x13BA] = (byte)(InitTitleGFX >> 8);
////}
/// <summary>Writes a pointer to the specified address in the last bank.</summary>
private void WriteLabel(int ptrAddress, AddressLabels labels, string labelName)
{
WriteLabel(0xF, ptrAddress, labels, labelName);
}