private void UpdateItemLinkedList()
{
int dist = itemData.DataMoveDist;
var pointerToData = Expander.pointers.ItemData.AsPRom(level); // Offset of program pointer to first item
var itemPointer = new pCpu(newRomData, pointerToData); // Address of first item
var dataOffset = itemPointer.AsPRom(level); // Offset of first item
bool done = false;
while (!done)
{
var OffsetOfpNext = dataOffset + 1;
pCpu pNext = new pCpu(newRomData, OffsetOfpNext);
done |= pNext.Value == 0xFFFF;
if (!done)
{
// Update pointer to next item to where item data will be moved to
pCpu updatedPNext = pNext + dist;
updatedPNext.Write(newRomData, OffsetOfpNext);
// Update dataOffset to point to next item
dataOffset = pNext.AsPRom(level);
}
}
}
/// <summary>
/// Finds the offset of a pointer table and its associated data, given the offset of the game's pointer to the pointer table.
/// </summary>
/// <param name="level"></param>
/// <param name="pointers"></param>
/// <param name="data"></param>
/// <param name="pointerCount">Specifies the number of pointers in the pointer table. This is used to init pointers.length and data.pointerCount.</param>
/// <param name="pTablePointer"></param>
void FindPointersAndData(Level level, DataSegment pointers, DataSegment data, pCpu pTablePointer, int pointerCount)
{
pointers.pPTable = pTablePointer.AsPRom(level);
pointers.ptableCount = 1;
pointers.length = pointerCount * 2;
pointers.pSource = level.DerefHandle(pointers.pPTable);
data.pPTable = pointers.pSource;
data.ptableCount = pointerCount;
data.pSource = level.DerefHandle(data.pPTable);
}
private pRom GetOffsetOfFirstPalEntry(Level level)
{
pCpu pFirst = (pCpu)0xFFFF;
for (int i = 0; i < Expander.pointers.PalPointerCount; i++)
{
var pData = level.PalettePointers[i];
if (pData < pFirst)
{
pFirst = pData;
}
}
return(pFirst.AsPRom(level));
}
public void SetPointers(Level level, pCpu ppPTable, int pointerCount)
{
this.pPTable = ppPTable.AsPRom(level);
this.ptableCount = pointerCount;
this.pSource = level.DerefHandle(ppPTable);
}