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--- archive:nmk206 [2025/05/06 22:39] – [Lab Session] azman
+++ archive:nmk206 [2025/06/18 08:23] (current) – [Lab Code (202425s2) Extra] azman
@@ Line 49: / Line 49: @@
     * [Extra] {{ :archive:nmk206:nmk206_20250325_3comb_logic_partial.mp4?linkonly |Online Session (Video) (Partial... was stopped due to low number of students)}}
   * Combinational Logic {{ :archive:nmk206:my1lab03.pdf |Slides (P1)}} {{ :archive:nmk206:my1lab04.pdf |Slides (P2)}} {{ :archive:nmk206:my1lab05.pdf |Slides (P3)}} {{ :archive:nmk206:my1lab06.pdf |Slides (P4)}} {{ :archive:nmk206:my1lab07.pdf |Slides (P5)}}
+  * Sequential Logic {{ :archive:nmk206:my1lab08.pdf |Slides (P1)}} {{ :archive:nmk206:my1lab09.pdf |Slides (P2)}}
-//**note**: these are from 202324s2 academic session. they should be very similar this semester, but some details may be added or removed. i usually post an updated version at the end of the week.//
+  * State Machine {{ :archive:nmk206:my1lab10.pdf |Slides}}
+  * Simple Digital System {{ :archive:nmk206:my1lab11.pdf |Slides}}
-  * Sequential Logic {{ :archive:pgt206:my1lab08.pdf |Slides (P1)}} {{ :archive:pgt206:my1lab08_ext.pdf |Slides (P1x)}} {{ :archive:pgt206:my1lab09.pdf |Slides (P2)}}
-  * State Machine {{ :archive:pgt206:my1lab10.pdf |Slides}}
-  * Simple Digital System {{ :archive:pgt206:my1lab11.pdf |Slides}}
 ==== Verilog Coding Rule ====
@@ Line 87: / Line 84: @@
     * **RULE**: All signals @wire must be declared!
+==== Lab Code (202425s2) Archive ====
+Complete template for a simple 4-bit processor core (as discussed during class) available {{ :archive:nmk206:nmk206-upcore_20250527.zip |here}}.
+==== Lab Code (202425s2) Extra ====
+Here is an example code to utilize the carry/borrow signals of our add/subtract modules at ALU level. You may use this to create add-with-carry and subtract-with-borrow functions (hint: you need a selector signal to 'enable' the carry/borrow in signals {iC} and {iB}).
+<file verilog alu_flag_4b.v>
+module alu_4b (iS,iP,iQ,iF,oF,oY);
+input[1:0] iS;
+input[3:0] iP,iQ,iF;
+output[3:0] oF,oY;
+wire[3:0] oY;
+wire iC, iB, oC,oB;
+wire[3:0] tA0, tA1;
+wire[3:0] tL0, tL1;
+add_4b a_add (iC,iP,iQ,oC,tA0);
+sub_4b a_sub (iB,iP,iQ,oB,tA1);
+and_4b l_and (iP,iQ,tL0);
+or_4b l_or (iP,iQ,tL1);
+// separate flag bits for borrow and carry
+assign oF = { 2'b00 , oB, oC };
+// should get from same bit position
+assign iB = iF[1];
+assign iC = iF[0];
+dmux41 sel0 (iS,tA0,tA1,tL0,tL1,oY);
+endmodule
+</file>
+<file verilog alu_flag_4b_tb.v>
+module alu_4b_tb ();
+reg[1:0] dS;
+reg[3:0] dP,dQ,dF;
+wire[3:0] mF,mY;
+reg[3:0] cF,cY;
+integer loop, ecnt;
+initial begin
+  ecnt = 0;
+  // TASK: try to put dS assignment in a loop! => shorter code!
+  dS = 2'b00; // test add
+  for (loop=0;loop<512;loop++) begin
+    {dF[0],dP,dQ} = loop;
+    #5;
+    { cF[0],cY } = dF[0] + dP + dQ;
+    if (cY!=mY||cF[0]!==mF[0]) begin
+      ecnt = ecnt + 1;
+      $display("** Add error (%x+%x+%x=%x@%x|%x:%x)!",dP,dQ,dF[0],mY,cY,
+        mF[0],cF[0]);
+    end
+  end
+  dS = 2'b01; // test sub
+  for (loop=0;loop<512;loop++) begin
+    {dF[1],dP,dQ} = loop;
+    #5;
+    { cF[1],cY } = dP - dQ - dF[1];
+    if (cY!=mY||cF[1]!==mF[1]) begin
+      ecnt = ecnt + 1;
+      $display("** Sub error (%x-%x-%x=%x@%x)!",dP,dQ,dF[1],mY,cY,
+        mF[1],cF[1]);
+    end
+  end
+  dS = 2'b10; // test and
+  for (loop=0;loop<256;loop++) begin
+    {dP,dQ} = loop;
+    #5;
+    cY = dP & dQ;
+    if (cY!=mY) begin
+      ecnt = ecnt + 1;
+      $display("** And error (%x&%x=%x@%x)!",dP,dQ,mY,cY);
+    end
+  end
+  dS = 2'b11; // test or
+  for (loop=0;loop<256;loop++) begin
+    {dP,dQ} = loop;
+    #5;
+    cY = dP | dQ;
+    if (cY!=mY) begin
+      ecnt = ecnt + 1;
+      $display("** Or error (%x|%x=%x@%x)!",dP,dQ,mY,cY);
+    end
+  end
+  if (ecnt==0) begin
+    $display("-- Module alu_4b verified!");
+  end
+  else begin
+    $display("** Module alu_4b with %g error(s)!",ecnt);
+  end
+end
+alu_4b dut (dS,dP,dQ,dF,mF,mY);
+endmodule
+</file>
+==== Lab Project (202425s2) Requirements ====
+This is also shared in Google Doc format (link available in Google Classroom).
+<file text nmk206-202425s2_labproject.txt>
+-----------
+LAB PROJECT
+-----------
+You are required to implement a soft-processor core (HDL-based) with the
+following minimum requirements:
+  - 8-bit microprocessor (instruction size, register size, etc.)
+  - 8 general purpose registers
+  - 8 ALU functions
+  - basic instruction set
+    = move data between registers
+    = perform basic ALU operations
+    = load register with immediate value
+These requirements are necessary for submission and minimum grade B.
+More functionality means better grades:
+  - 16-bit/32-bit microprocessor
+  - carry circuit for adder (>8b)
+  - integer multiply/divide circuit (structural code - NOT behavior)
+  - bit-level manipulation (towards microcontroller)
+  - instruction fetch unit and memory interface
+Note#1: Auto-0 for downloaded codes!
+Note#2: This is a group assignment, but marks will be evaluated individually.
+Assessment deliverables:
+) Verilog source files in a single ZIP file
+- make sure only Verilog files are included in the file
+- make sure all modules have each a proper testbench
+- must be self-checking testbenches
+) Technical Document (Specifications)
+- not more than 10 pages, no cover page (only list of members' names)
+- content:
+  = short summary of features
+  = block diagram of design
+  = list of instructions (description and op-code)
+) An online demonstration / Q&A
+- not more than 20 minutes
+- content:
+  = short summary of what has been implemented
+  = if completed, demonstrate running the top-level testbench
+  = if NOT completed, demonstrate running component-level testbenches
+PROJECT DUE: Lab Session@W14/14 (Item 1&2). Item 3 TBD.
+Extra Info:
+- each student may email in a contribution percentage information:
+  = list all group members (specify project contribution percentage of each)
+  = percentage values should total up to 100% (may use fraction e.g. 1/3)
+Note: this is optional,but if a member decides to do this, please advise
+the others in group to do the same
+</file>