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]);
}
