From 4008067c7c1b85a7ac0f89e1fa98b699240efb68 Mon Sep 17 00:00:00 2001
From: Grimicron <angelfradejasdelval@gmail.com>
Date: Sun, 5 Mar 2023 00:59:07 +0000
Subject: [PATCH] Fixed mmap is null error in cpu.js.

---
 src/cpu.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/cpu.js b/src/cpu.js
index 4a0a40c3..d2057567 100644
--- a/src/cpu.js
+++ b/src/cpu.js
@@ -143,6 +143,7 @@ CPU.prototype = {
       this.irqRequested = false;
     }
 
+    if (null == this.nes.mmap) return 32;
     var opinf = this.opdata[this.nes.mmap.load(this.REG_PC + 1)];
     var cycleCount = opinf >> 24;
     var cycleAdd = 0;
@@ -1318,6 +1319,7 @@ CPU.prototype = {
   },
 
   doNonMaskableInterrupt: function (status) {
+    if (null == this.nes.mmap) return;
     if ((this.nes.mmap.load(0x2000) & 128) !== 0) {
       // Check whether VBlank Interrupts are enabled