From 911ed0cc52c5be26573902f2d5a3d59d8970d9c9 Mon Sep 17 00:00:00 2001
From: Ernest Wong <ewon521@gmail.com>
Date: Sun, 18 Feb 2018 12:01:00 +1300
Subject: [PATCH] Fix dma update mask logic: 1 !== true

Pass consistent types
---
 src/dma.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/dma.js b/src/dma.js
index e0029e65..4283bded 100644
--- a/src/dma.js
+++ b/src/dma.js
@@ -197,7 +197,7 @@ DMA.prototype.port_page_read = function(channel)
 DMA.prototype.port_singlemask_write = function(channel_offset, data_byte)
 {
     var channel = (data_byte & 0x3) + channel_offset;
-    var value = !!(data_byte & 0x4);
+    var value = data_byte & 0x4 ? 1 : 0;
     dbg_log("singlechannel mask write [" + channel + "] = " + value, LOG_DMA);
     this.update_mask(channel, value);
 };
@@ -247,7 +247,7 @@ DMA.prototype.update_mask = function(channel, value)
 {
     if(this.channel_mask[channel] !== value)
     {
-        this.channel_mask[channel] ^= 1;
+        this.channel_mask[channel] = value;
 
         if(!value)
         {