From 3dc85ae126e2ed1fb31c33c010679ff7cc626959 Mon Sep 17 00:00:00 2001
From: darkzense <torresjohn094@gmail.com>
Date: Sat, 18 Nov 2023 19:25:02 -0600
Subject: [PATCH] clear the stack data in every execution

---
 system/cpu/execution_unit.ts |  3 ++-
 system/instructions/stack.ts |  6 ++++--
 system/memory/data.ts        | 14 +++++++++++++-
 3 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/system/cpu/execution_unit.ts b/system/cpu/execution_unit.ts
index 1fbf001..bd808c1 100644
--- a/system/cpu/execution_unit.ts
+++ b/system/cpu/execution_unit.ts
@@ -1,5 +1,5 @@
 import cpu from "./components.js";
-import { processInfo } from "../memory/data.js";
+import { clearStackData, processInfo } from "../memory/data.js";
 import { decodeInstruction } from "../assembler.js";
 import { instructionSet } from "./arch.js";
 import { Instruction, Executable } from "./interface.js";
@@ -57,6 +57,7 @@ function resetRegisters(): void {
   }
 
   resetSpOffset();
+  clearStackData();
 }
 
 function execute(instruction: Instruction): void {
diff --git a/system/instructions/stack.ts b/system/instructions/stack.ts
index 2af6e0d..b9ce53d 100644
--- a/system/instructions/stack.ts
+++ b/system/instructions/stack.ts
@@ -40,7 +40,9 @@ export class Pop implements Executable {
 
     const topOfStack = getDataByAddress("stack-data", cpu.stackPointer)!;
     if (!topOfStack.value) {
-      throw new ReferenceError("There is no data at the address of the stack pointer.");
+      throw new ReferenceError(
+        "There is no data at the address of the stack pointer.",
+      );
     }
 
     let nextStackPointer = cpu.stackPointer.parseHex();
@@ -56,7 +58,7 @@ export class Pop implements Executable {
     cpu.MAR = hexOperand;
     const actualData = getDataByAddress("main-data", hexOperand)!;
     // cpu.controlUnit = "IR(5-16)out, MARin, READ";
-    
+
     cpu.MDR = (+topOfStack.value).asHex16();
     cpu.controlUnit = "SPout, MDRin, WRITE";
     actualData.value = topOfStack.value;
diff --git a/system/memory/data.ts b/system/memory/data.ts
index a054844..0c01b8a 100644
--- a/system/memory/data.ts
+++ b/system/memory/data.ts
@@ -70,4 +70,16 @@ function getDataByVariable(tbodyId: string, variable: string) {
   return getDataCell(tbodyId, VAR_COLUMN, variable);
 }
 
-export { getDataByAddress, getDataByVariable, processInfo };
+function clearStackData() {
+  const stackTbody = <HTMLTableSectionElement>(
+    document.getElementById("stack-data")
+  );
+
+  for (let row of stackTbody.rows) {
+    const inputCells = row.getElementsByTagName("input");
+    inputCells[1].value = ""; // Variable
+    inputCells[2].value = ""; // Value
+  }
+}
+
+export { getDataByAddress, getDataByVariable, clearStackData, processInfo };