private void ProcessNextInstruction()
{
byte opCode = memoryMap.ReadByte(registers.PC);
registers.PC++;
cycles = processor.ProcessOpcode(opCode);
}
/// <summary>
/// Performs operations specified by the passed in opcode.
/// This method modifies memory, registers, and flags.
/// The program counter will be incremented if the specified opcode
/// has operands.
/// The number of cycles the operation takes is returned.
/// </summary>
/// <param name="opcode">The opcode to process.</param>
/// <returns>The number of cycles the operation takes.</returns>
public int ProcessOpcode(byte opcode)
{
currentOpcode = opcode;
branchTaken = false;
if ((PrimaryOpcode)opcode == PrimaryOpcode.PREFIX_CB)
{
isPrimaryOpcode = false;
registers.PC++;
opcode = memoryMap.ReadByte(registers.PC);
return(ProcessPrefixedOpcode((PrefixedOpcode)opcode));
}
else
{
isPrimaryOpcode = true;
return(ProcessPrimaryOpcode((PrimaryOpcode)opcode));
}
}
