private BitwiseMultiwayMux m_gJumpMux;//an example of a control unit compnent - a mux that controls whether a jump is made
private void ConnectControls()
{
//1. connect control of mux 1 (selects entrance to register A)
m_gAMux.ConnectControl(Instruction[Type]);
//2. connect control to mux 2 (selects A or M entrance to the ALU)
m_gMAMux.ConnectControl(Instruction[A]);
//3. consider all instruction bits only if C type instruction (MSB of instruction is 1)
//4. connect ALU control bits
m_gALU.ZeroX.ConnectInput(Instruction[C1]);
m_gALU.NotX.ConnectInput(Instruction[C2]);
m_gALU.ZeroY.ConnectInput(Instruction[C3]);
m_gALU.NotY.ConnectInput(Instruction[C4]);
m_gALU.F.ConnectInput(Instruction[C5]);
m_gALU.NotOutput.ConnectInput(Instruction[C6]);
//5. connect control to register D (very simple)
and_D.ConnectInput1(Instruction[D2]);
and_D.ConnectInput2(Instruction[Type]);
m_rD.Load.ConnectInput(and_D.Output);
//6. connect control to register A (a bit more complicated)
not_A.ConnectInput(Instruction[Type]);
or_A.ConnectInput1(not_A.Output);
or_A.ConnectInput2(Instruction[D1]);
m_rA.Load.ConnectInput(or_A.Output);
//7. connect control to MemoryWrite
and_MW.ConnectInput1(Instruction[D3]);
and_MW.ConnectInput2(Instruction[Type]);
MemoryWrite.ConnectInput(and_MW.Output);
//8. create inputs for jump mux
not_Zero.ConnectInput(m_gALU.Zero);
not_Neg.ConnectInput(m_gALU.Negative);
and_JMP.ConnectInput1(not_Zero.Output);
and_JMP.ConnectInput2(not_Neg.Output);
//not3.ConnectInput(m_gALU.Negative);
or_JMP.ConnectInput2(m_gALU.Negative);
or_JMP.ConnectInput1(m_gALU.Zero);
//not4.ConnectInput(m_gALU.Zero);
//or2.ConnectInput1(m_gALU.Zero);
//or2.ConnectInput2(m_gALU.Negative);
//9. connect jump mux (this is the most complicated part)
m_gJumpMux = new BitwiseMultiwayMux(1, 3);
J_0.ConnectInput(wi1);
m_gJumpMux.Inputs[0][0].ConnectInput(J_0);
JGT.ConnectInput(and_JMP.Output);
m_gJumpMux.Inputs[1][0].ConnectInput(JGT);
JEQ.ConnectInput(m_gALU.Zero);
m_gJumpMux.Inputs[2][0].ConnectInput(JEQ);
JGE.ConnectInput(not_Neg.Output);
m_gJumpMux.Inputs[3][0].ConnectInput(JGE);
JLT.ConnectInput(m_gALU.Negative);
m_gJumpMux.Inputs[4][0].ConnectInput(JLT);
JNE.ConnectInput(not_Zero.Output);
m_gJumpMux.Inputs[5][0].ConnectInput(JNE);
JLE.ConnectInput(or_JMP.Output);
m_gJumpMux.Inputs[6][0].ConnectInput(JLE);
wi2.Value = 1;
J_1.ConnectInput(wi2);
m_gJumpMux.Inputs[7][0].ConnectInput(J_1);
and_JM2.ConnectInput1(Instruction[Type]);
and_JM2.ConnectInput2(Instruction[J1]);
and_JM1.ConnectInput1(Instruction[Type]);
and_JM1.ConnectInput2(Instruction[J2]);
and_JM0.ConnectInput1(Instruction[Type]);
and_JM0.ConnectInput2(Instruction[J3]);
JMP[2].ConnectInput(and_JM2.Output);
JMP[1].ConnectInput(and_JM1.Output);
JMP[0].ConnectInput(and_JM0.Output);
m_gJumpMux.ConnectControl(JMP);
//10. connect PC load control
m_rPC.ConnectLoad(m_gJumpMux.Output[0]);
}
private void ConnectControls()
{
or = new OrGate();
muxArray = new MuxGate[9];
NotGate not = new NotGate();
JGT = new AndGate();
JGE = new OrGate();
JLE = new OrGate();
JNE = new NotGate();
notArray = new NotGate[2];
for (int i = 0; i < notArray.Length; i++)
{
notArray[i] = new NotGate();
}
m_gJumpMux = new BitwiseMultiwayMux(1, 3);
jump = new WireSet(3);
andForPCLoad = new AndGate();
Wire PCLoad = new Wire();
//1.
m_gAMux.ConnectControl(Instruction[Type]);
//2. connect control to mux 2 (selects A or M entrance to the ALU)
m_gMAMux.ConnectControl(Instruction[A]);
//3. consider all instruction bits only if C type instruction (MSB of instruction is 1)
for (int i = 0; i < muxArray.Length; i++)
{
muxArray[i] = new MuxGate();
muxArray[i].ConnectInput1(new Wire());
muxArray[i].ConnectInput2(Instruction[i + 3]);
muxArray[i].ConnectControl(Instruction[Type]);
}
//4. connect ALU control bits
m_gALU.ZeroX.ConnectInput(muxArray[C1 - 3].Output);
m_gALU.NotX.ConnectInput(muxArray[C2 - 3].Output);
m_gALU.ZeroY.ConnectInput(muxArray[C3 - 3].Output);
m_gALU.NotY.ConnectInput(muxArray[C4 - 3].Output);
m_gALU.F.ConnectInput(muxArray[C5 - 3].Output);
m_gALU.NotOutput.ConnectInput(muxArray[C6 - 3].Output);
//5. connect control to register D (very simple)
m_rD.Load.ConnectInput(muxArray[D2 - 3].Output);
//6. connect control to register A (a bit more complicated)
not.ConnectInput(Instruction[Type]);
or.ConnectInput1(not.Output);
or.ConnectInput2(muxArray[D1 - 3].Output);
m_rA.Load.ConnectInput(or.Output);
//7. connect control to MemoryWrite
MemoryWrite.ConnectInput(muxArray[D3 - 3].Output);
//8. create inputs for jump mux
notArray[0].ConnectInput(m_gALU.Zero);
notArray[1].ConnectInput(m_gALU.Negative);
//JGT:
JGT.ConnectInput1(notArray[0].Output);
JGT.ConnectInput2(notArray[1].Output);
//JGE:
JGE.ConnectInput1(m_gALU.Zero);
JGE.ConnectInput2(notArray[1].Output);
//JNE:
JNE.ConnectInput(notArray[0].Output);
//JLE:
JLE.ConnectInput1(m_gALU.Zero);
JLE.ConnectInput2(m_gALU.Negative);
WireSet JGTOut = new WireSet(1);
WireSet JEQOut = new WireSet(1);
WireSet JLTOut = new WireSet(1);
WireSet JGEOut = new WireSet(1);
WireSet JNEOut = new WireSet(1);
WireSet JLEOut = new WireSet(1);
JGTOut[0].ConnectInput(JGT.Output);
JEQOut[0].ConnectInput(m_gALU.Zero);
JLTOut[0].ConnectInput(m_gALU.Negative);
JGEOut[0].ConnectInput(JGE.Output);
JNEOut[0].ConnectInput(JNE.Output);
JLEOut[0].ConnectInput(JLE.Output);
//9. connect jump mux (this is the most complicated part)
jump[0].ConnectInput(Instruction[J3]);
jump[1].ConnectInput(Instruction[J2]);
jump[2].ConnectInput(Instruction[J1]);
m_gJumpMux.ConnectControl(jump);
m_gJumpMux.ConnectInput(0, new WireSet(1));
m_gJumpMux.ConnectInput(1, JGTOut);
m_gJumpMux.ConnectInput(2, JEQOut);
m_gJumpMux.ConnectInput(3, JGEOut);
m_gJumpMux.ConnectInput(4, JLTOut);
m_gJumpMux.ConnectInput(5, JNEOut);
m_gJumpMux.ConnectInput(6, JLEOut);
m_gJumpMux.Inputs[7].Value = 1;
//10. connect PC load control
andForPCLoad.ConnectInput1(m_gJumpMux.Output[0]);
andForPCLoad.ConnectInput2(Instruction[Type]);
m_rPC.ConnectLoad(andForPCLoad.Output);
}
