//MICRO_INSTRUCTIONS*****************************************/
/**
* @brief Executes an instruction.
* @param id - the ID of the instruction to be executed.
*/
public IEnumerator ExecuteInstrucion(int id)
{
switch (id)
{
case (0x00):
ALU.SetAdditionCircuitry();
yield return(Instruction_IMMEDIATE_COMPUTE(GPA));
break;
case (0x01):
ALU.SetAdditionCircuitry();
yield return(Instruction_IMMEDIATE_COMPUTE(GPB));
break;
case (0x02):
ALU.SetAdditionCircuitry();
yield return(Instruction_DIRECT_COMPUTE(GPA));
break;
case (0x03):
ALU.SetAdditionCircuitry();
yield return(Instruction_DIRECT_COMPUTE(GPB));
break;
case (0x04):
ALU.SetAdditionCircuitry();
yield return(Instruction_COMPUTE(GPA, GPB));
break;
case (0x05):
ALU.SetAdditionCircuitry();
yield return(Instruction_COMPUTE(GPB, GPA));
break;
case (0x06):
ALU.SetSubtractionCircuitry();
yield return(Instruction_IMMEDIATE_COMPUTE(GPA));
break;
case (0x07):
ALU.SetSubtractionCircuitry();
yield return(Instruction_IMMEDIATE_COMPUTE(GPB));
break;
case (0x08):
ALU.SetSubtractionCircuitry();
yield return(Instruction_DIRECT_COMPUTE(GPA));
break;
case (0x09):
ALU.SetSubtractionCircuitry();
yield return(Instruction_DIRECT_COMPUTE(GPB));
break;
case (0x0A):
ALU.SetSubtractionCircuitry();
yield return(Instruction_COMPUTE(GPA, GPB));
break;
case (0x0B):
ALU.SetSubtractionCircuitry();
yield return(Instruction_COMPUTE(GPB, GPA));
break;
case (0x0C):
yield return(Instruction_IMMEDIATE_COMPARE(GPA));
break;
case (0x0D):
yield return(Instruction_IMMEDIATE_COMPARE(GPB));
break;
case (0x0E):
yield return(Instruction_DIRECT_COMPARE(GPA));
break;
case (0x0F):
yield return(Instruction_DIRECT_COMPARE(GPB));
break;
case (0x10):
yield return(Instruction_COMPARE(GPA, GPB));
break;
case (0x11):
yield return(Instruction_COMPARE(GPB, GPA));
break;
case (0x12):
yield return(ReadIROperand(GPA));
break;
case (0x13):
yield return(ReadIROperand(GPB));
break;
case (0x14):
yield return(MemoryDirectFetch());
yield return(WriteToGPA(MDR));
break;
case (0x15):
yield return(MemoryDirectFetch());
yield return(WriteToGPB(MDR));
break;
case (0x16):
yield return(WriteToGPA(GPB));
break;
case (0x17):
yield return(WriteToGPB(GPA));
break;
case (0x18):
yield return(Instruction_moveToMemory_DIRECT(GPA));
break;
case (0x19):
yield return(Instruction_moveToMemory_DIRECT(GPB));
break;
case (0x1A):
yield return(Instruction_moveToMemory_INDIRECT(GPA));
break;
case (0x1B):
yield return(Instruction_moveToMemory_INDIRECT(GPB));
break;
case (0x1C):
yield return(ReadIROperand(PC));
break;
case (0x1D):
yield return(Instruction_DIRECT_jump());
break;
case (0x1E):
yield return(Instruction_IMMEDIATE_branchOnFlag(ProcessStatusRegister.FLAGS.CARRY, true));
break;
case (0x1F):
yield return(Instruction_IMMEDIATE_branchOnFlag(ProcessStatusRegister.FLAGS.CARRY, false));
break;
case (0x20):
yield return(Instruction_DIRECT_branchOnFlag(ProcessStatusRegister.FLAGS.CARRY, true));
break;
case (0x21):
yield return(Instruction_DIRECT_branchOnFlag(ProcessStatusRegister.FLAGS.CARRY, false));
break;
case (0x22):
yield return(Instruction_IMMEDIATE_branchOnFlag(ProcessStatusRegister.FLAGS.NEGATIVE, true));
break;
case (0x23):
yield return(Instruction_IMMEDIATE_branchOnFlag(ProcessStatusRegister.FLAGS.NEGATIVE, false));
break;
case (0x24):
yield return(Instruction_DIRECT_branchOnFlag(ProcessStatusRegister.FLAGS.NEGATIVE, true));
break;
case (0x25):
yield return(Instruction_DIRECT_branchOnFlag(ProcessStatusRegister.FLAGS.NEGATIVE, false));
break;
case (0x26):
yield return(Instruction_IMMEDIATE_branchOnFlag(ProcessStatusRegister.FLAGS.ZERO, true));
break;
case (0x27):
yield return(Instruction_IMMEDIATE_branchOnFlag(ProcessStatusRegister.FLAGS.ZERO, false));
break;
case (0x28):
yield return(Instruction_DIRECT_branchOnFlag(ProcessStatusRegister.FLAGS.ZERO, true));
break;
case (0x29):
yield return(Instruction_DIRECT_branchOnFlag(ProcessStatusRegister.FLAGS.ZERO, false));
break;
case (0x2A):
yield return(Instruction_IMMEDIATE_branchOnFlag(ProcessStatusRegister.FLAGS.OVERFLOW, true));
break;
case (0x2B):
yield return(Instruction_IMMEDIATE_branchOnFlag(ProcessStatusRegister.FLAGS.OVERFLOW, false));
break;
case (0x2C):
yield return(Instruction_DIRECT_branchOnFlag(ProcessStatusRegister.FLAGS.OVERFLOW, true));
break;
case (0x2D):
yield return(Instruction_DIRECT_branchOnFlag(ProcessStatusRegister.FLAGS.OVERFLOW, false));
break;
}
}