Fixed ALU bug and added missed updates to the Wbit

cpu/alu.v

@@ -6,13 +6,23 @@ reg C_FLAG;
 assign FLAGS={(Wbit==1)?OUT[15:15]:OUT[7:7],(Wbit==1) ? (OUT[15:0]=='h0000) : (OUT[7:0]=='h00),5'b00000,C_FLAG};
 
 always @ ( * ) begin
-	case (op)
+	if(Wbit==1)begin
-		`ALU_OP_ADD: {C_FLAG,OUT}=A+B;
+		case (op)
-		`ALU_OP_SUB: {C_FLAG,OUT}=A-B;
+			`ALU_OP_ADD: {C_FLAG,OUT}=A+B;
-		`ALU_OP_AND: OUT=A&B;
+			`ALU_OP_SUB: {C_FLAG,OUT}=A-B;
-		`ALU_OP_OR:  OUT=A|B;
+			`ALU_OP_AND: OUT=A&B;
-		`ALU_OP_XOR: OUT=A^B;
+			`ALU_OP_OR:  OUT=A|B;
-	endcase
+			`ALU_OP_XOR: OUT=A^B;
+		endcase
+	end else begin
+		case (op)
+			`ALU_OP_ADD: {C_FLAG,OUT[7:0]}=A[7:0]+B[7:0];
+			`ALU_OP_SUB: {C_FLAG,OUT[7:0]}=A[7:0]-B[7:0];
+			`ALU_OP_AND: OUT=A&B;
+			`ALU_OP_OR:  OUT=A|B;
+			`ALU_OP_XOR: OUT=A^B;
+		endcase
+	end
 end
 
 endmodule

cpu/processor.v

@@ -220,6 +220,7 @@ always @(posedge clock) begin
 							/* Add Immediate word/byte to register/memory */
 							/* 1 0 0 0  0 0 S W | MOD 0 0  0  R/M  |     < DISP LO >  |     < DISP HI >   |      DATA        |      DATA if W    |    */
 							`start_aligning_instruction
+							Wbit=CIR[8:8];
 							IN_MOD=2'b11;
 							in1_sel=2'b00;
 							in2_sel=2'b01;
@@ -321,6 +322,7 @@ always @(posedge clock) begin
 					/* INC - Increment Register */
 					/*   | 0 1 0 0  0  REG  |   */
 					`start_unaligning_instruction
+					Wbit=1;
 					in1_sel=2'b01;
 					in2_sel=2'b00;
 					out_sel=2'b11;
@@ -344,6 +346,7 @@ always @(posedge clock) begin
 								/*                          INC - Register/Memory                            */
 								/* 1 1 1 1  1 1 1 W | MOD 0 0  0  R/M  |    < DISP LO>    |    < DISP HI>    */
 								`start_aligning_instruction
+								Wbit=CIR[8:8];
 								IN_MOD=CIR[7:6];
 								in1_sel=2'b00;/* number 1 */
 								in2_sel=(CIR[7:6]==2'b11)? 2'b01 : 2'b00;