From 1d88d0b5b6e01270cf180aed4878722e150da177 Mon Sep 17 00:00:00 2001
From: n loewen <nick@nloewen.com>
Date: Wed, 16 Aug 2023 12:56:30 +0100
Subject: [PATCH] Refactor: Use `setInterval` to clock CPU, in order to remove
 unnecessary use of async/await

---
 cpu.js     | 14 +++++++-------
 run-cpu.js |  2 +-
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/cpu.js b/cpu.js
index a2725d3..3a57d9f 100644
--- a/cpu.js
+++ b/cpu.js
@@ -294,18 +294,20 @@ async function stepCPU(debug = false) {
       CPU.cycleCounter += 1;
     }
   }
-  await logCPUState(debug);
+  logCPUState(debug);
 }
 
 /**
  * @param {Uint8Array} code - Machine code to run
  * @param {Boolean} [debug] - Enable/disable debugging printouts
  **/
-exports.runProgram = async (code, debug = false) => {
+exports.runProgram = (code, debug = false, framerate = 10) => {
   startCPU(code);
-  while (CPU.running) {
+  // Animate the output by pausing between steps
+  const loop = setInterval(async () => {
     stepCPU(debug);
-  };
+    if (!CPU.running) clearInterval(loop);
+  }, framerate);
 }
 
 
@@ -314,7 +316,7 @@ exports.runProgram = async (code, debug = false) => {
 /**
  * @param {Boolean} [debug] - Enable/disable debugging printouts
  **/
-async function logCPUState(debug = false) {
+function logCPUState(debug = false) {
   console.group(`Step`);
     if (!debug) console.clear();
     if (debug) {
@@ -328,7 +330,5 @@ async function logCPUState(debug = false) {
     console.log();
     console.log(`IP: $${num2hex(CPU.IP)}  Acc: $${num2hex(CPU.Acc)}  NZOC: ${num2bin_4bit(CPU.FLAGS)}  ${CPU.running ? "running" : "halted" }`);
     console.log();
-    // Pause to show animated display:
-    if (!debug) await new Promise(resolve => setTimeout(resolve, 75));
   console.groupEnd();
 };
\ No newline at end of file
diff --git a/run-cpu.js b/run-cpu.js
index 9da11e1..dae2798 100755
--- a/run-cpu.js
+++ b/run-cpu.js
@@ -29,5 +29,5 @@ if (mode === "debug") {
   computer.runProgram(machineCode, true);
 } else {
   machineCode = assembler.assemble(inputFile_str);
-  computer.runProgram(machineCode, false);
+  computer.runProgram(machineCode, false, 200);
 }
\ No newline at end of file