From fa6207d0a23256a9d87f8f191c91b814bfd64e32 Mon Sep 17 00:00:00 2001
From: byby9527 <99935115+byby9527@users.noreply.github.com>
Date: Thu, 3 Nov 2022 11:02:05 +0800
Subject: [PATCH] Update CPU.hdl

---
 05/CPU.hdl | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/05/CPU.hdl b/05/CPU.hdl
index 86558934..10574030 100644
--- a/05/CPU.hdl
+++ b/05/CPU.hdl
@@ -40,4 +40,31 @@ CHIP CPU {
 
     PARTS:
     // Put your code here:
-}
\ No newline at end of file
+    Mux16(a = instruction, b = ALUout, sel = instruction[15], out = inA); 
+    Not(in = instruction[15], out = isA);
+    And(a = instruction[15], b = instruction[5], out = CloadA);
+    Or(a = isA, b = CloadA, out = loadA);
+    ARegister(in = inA, load = loadA, out = outA, out[0..14] = addressM, out = pcin);
+    And(a = instruction[15], b = instruction[4], out = loadD);
+    DRegister(in = ALUout, load = loadD, out = outD);
+    And(a = instruction[15], b = instruction[3], out = writeM);
+    And(a = instruction[12], b = instruction[15], out = sel1);
+    Mux16(a = outA, b = inM, sel = sel1, out = ALUin); 
+    And(a = instruction[15], b = instruction[11], out = zx);
+    And(a = instruction[15], b = instruction[10], out = nx);
+    And(a = instruction[15], b = instruction[9], out = zy);
+    And(a = instruction[15], b = instruction[8], out = ny);
+    And(a = instruction[15], b = instruction[7], out = f);
+    And(a = instruction[15], b = instruction[6], out = no);
+    ALU(x = outD, y = ALUin, zx = zx, nx = nx, zy = zy, ny = ny, f = f, no = no, out = ALUout, out = outM, zr = zr, ng = ng);
+    And(a = ng, b = instruction[2], out = t1);  // < 0
+    And(a = zr, b = instruction[1], out = t2);  // = 0
+    Or(a = ng, b = zr, out = ngz);  
+    Not(in = ngz, out = pos);   
+    And(a = pos, b = instruction[0], out = t3);  // > 0
+    Or(a = t1, b = t2, out = tt1);             
+    Or(a = tt1, b = t3, out = tt);
+    And(a = instruction[15], b = tt, out = PCload); 
+    PC(in = pcin, load = PCload, inc = true, reset = reset, out[0..14] = pc); 
+    
+}