1. Create a project Lab2.circ in the Logisim.
2. Add a circuit testing Registers (including 1-bit, 2-bit, 8-bit).
3. Add a circuit testing TRI-STATE BUFFERS (including 1-bit, 2-bit, 8-bit).
4. Add a circuit testing Decoders (including 1 to 2, 2 to 4, and 3 to 8 decoders).
5. Add a circuit to build a 1-bit CPU described in the lab notes.
   Here is a picture of the 1-bit CPU circuit for your reference.

   Some Relevant Details:

   
   The ALU performs two operations, XOR and AND.
   The operation to be performed is determined by the code in the IR.
   The value 0 in the IR indicates an XOR operation and the value 1 in IR indicates an AND operation.

   The following control signals will be required for our 1-bit CPU in this lab:

    ACCout, ACCin, TMPout, TMPin, ALUout, IRin, Bout, Bin, Cout, Cin, EXTin, EXTout. 

6. To implement the operation AND, let's assume that it uses the operands in registers B and C, and then stores the result in C,
   The following instructions would have to be executed.
   (assume the external input switch is set to the value '1' - the pre-condition for the AND operation):
   Remember to pre-load '0' in register B and '1' in register C.
   And see what is the result in register C.

    1. EXTin, EXTout, IRin. // Load '1' in register IR for AND operation. 2. EXTin, EXTout, Bin. // Load '0' in register B. 3. EXTin, EXTout, Cin. // Load '1' in register C. 4. Bout, ACCin. 5. Cout, TMPin. 6. ALUout, Cin. 

   Practice these microinstructions with your newly built CPU.

7. Do the following for your lab assignment:

    Write out the steps necessary to implement the operation XOR that uses the operands in the register ACC and register C, and then stores the result in register B. 

8. You are now able to Build a 2-bit CPU by expanding the 1-bit CPU described in the lab notes.
   Remember to have a 2-bit bus for your design.
   The 2-bit CPU will do the following operations:

• For instruction 00, do 2-bit XOR, test 10 XOR 11 = 01
• For instruction 01, do 2-bit AND, test 10 AND 11 = 10
• For instruction 10, do 2-bit NOT operation, the Operand will be in the register ACC, test NOT 10 = 01.
• For instruction 11, do 2-bit OR, test 10 OR 11 = 11

Lab Assignments 1. Create a project Lab2 cire in the Logisim. 2. Add a circuit testing Registers fincluoing 1.bit, 2-bit. 8-bit) 3. Add a circuit testing TRI-STATE BUFFERS (including 1-bit. 2.bit, 8-bit). 4. Add a circult testing Decoders (including 1 to 2,2 to 4 , and 3 to 8 docodors). 5. Add a circuit to build a 1-bit CPU described in the lab notes. Here is a picture of the 1 bif CPU crcuit for your retesence. Some Relevant Details: The ALU pertorms two operations, X OR and AND. The operation to be performed is to be determined by the code in the IR. The value 0 in the IR indicates an XOR operation and the value 1 in IR indicabos an AND opernion. The following control signals will be required for our 1-bli CPU in this lab: ACCont, MCCin, TrEat, TWin, Rubeut, Isin, Bost, tin, Cout, cin, Extin, Extout. The foliowing instruotions would have to be ewecuted. (assume beventemal hout swilch is set to the valoe 'T' - the pre-condition for the AND coscabonk Pernember to peetoad O in register B and 'T' in register C And swe what is the result in negitier C. 2. Extin, exfoit, sin. I/ Leat "oc in recistre 1. 4. Bent, Acciar. 3. Cout, Twin. 6. Willout, kin. Pracice these microhstuctions with your newly bult CPU. 7. Do the following for your lab assignment: Bhat vies the doperadis in the reetiter act wed meliser C, wat then storet the rosult in reclister 8 . 6. You ace now able to Bulld a 2-tet Cru by wopanding the 1-bet CPU desorbed in the lab notes Remember to have a 2 bit bus for your design. The 2 -bit CPU will do the following operations: - For instruetion 00, do 2 -be XOR, hest 10 XOR 11= or - For instruction 01, do 24t AND, lest 10 AND 11 - 10 - For instruction 10, do 2-be NOT operation, the Operand will be in the rogister ACC, test NoT to * 01 . - For inatruction 11, ds 2.til OR, tost 10 OR 11 - 11 Lab Assignments 1. Create a project Lab2.circ in the Logisim. 2. Add a circuit testing Registers (including 1-bit, 2-bit, 8-bit), 3. Add a circuit testing TRI-STATE BUFFERS fincluding 1-bit. 2-bit, 8-bit). 4. Add a circuit testing Decoders (including 1 to 2,2 to 4 , and 3 to 8 decoders). 5. Add a circuit to build a 1-bit CPU described in the lab notes. Here is a picture of the 1 -bit CPU circuit for your reference. Some Relevant Details: The ALU pertorms two operations. XOR and AND. The operation to be performed is determined by the code in the IR. The value 0 in the IR indicates an XOR operation and the value 1 in IR indicates an AND operation. The following control signals will be required for our 1-bit CPU in this lab: ACCout, ACCin, TMPost, THPin, ALDout, IRin, Boat, Bin, Cout, Cin, Exin, ExFout, 6. To implement the operation AND, let's assume that it uses the operands in registers B and C, and then stores the result in C, The following instructions would have to be executed. (assume the exdernal input switch is set to the value ' 1 ' - the pre-condition for the AND operation): Remember to pre-load ' 0 ' in register B and ' 1 ' in register C. And see what is the result in register C. 1. Extin, ExTout, IMin. // Load ' 1 ' in rogister ID for NMD operation. 2. EXTIn, EXTout, Bin. If Load ' 0 ' in rolgister B. 3. EXTIn, EXTout, Cin. /f Load ' 1 ' in register c. 4. Bout, ACcin. 5. Coat, Totpin. 6. Aldout, cin. Practice these microinstructions with your newly built CPU. t. Do the following for your lab assignment: Write out the ateps necessary to implenent the operation wor that lases the operands in the register McC and reqister c, and then stores the result in register . 8. You are now able to Build a 2-bit CPU by expanding the 1-bit CPU described in the lab notes. Remember to have a 2-bit bus for your design. The 2-bit CPU will do the following operations: - For instruction 00 , do 2-bit XOR, test 10OR11=01 - For instruction 01, do 2-bit AND, test 10 AND 11=10 - For instruction 10, do 2-bit NOT operation, the Operand will be in the register ACC, test NOT 10=01. - For instruction 11, do 2-bit OR, test 10 OR 11=11