diff --git a/lib/parser.js b/lib/parser.js
index 35effbf..0845d2f 100644
--- a/lib/parser.js
+++ b/lib/parser.js
@@ -61,10 +61,15 @@ Parser.prototype.writePacket = function(packetId, params) {
 
 var writers = {
   'int': IntWriter,
+  'short': ShortWriter,
   'byte': ByteWriter,
   'ubyte': UByteWriter,
   'string': StringWriter,
   'byteArray': ByteArrayWriter,
+  'bool': BoolWriter,
+  'double': DoubleWriter,
+  'float': FloatWriter,
+  'slot': SlotWriter,
 };
 
 var readers = {
@@ -98,8 +103,8 @@ function readIntArray(buffer, offset) {
   var count = results.value;
   var cursor = offset + results.size;
 
-  var endCursor = cursor + 4 * count;
-  if (endCursor > buffer.length) return null;
+  var cursorEnd = cursor + 4 * count;
+  if (cursorEnd > buffer.length) return null;
   var array = [];
   for (var i = 0; i < count; ++i) {
     array.push(buffer.readInt32BE(cursor));
@@ -108,7 +113,7 @@ function readIntArray(buffer, offset) {
 
   return {
     value: array,
-    size: endCursor - offset,
+    size: cursorEnd - offset,
   };
 }
 
@@ -233,8 +238,8 @@ function readMapChunkBulk (buffer, offset) {
   var dataSize = buffer.readInt32BE(offset + 2);
   var skyLightSent = !!buffer.readInt8(offset + 6);
 
-  var endCursor = cursor + dataSize + 12 * chunkCount;
-  if (endCursor > buffer.length) return null;
+  var cursorEnd = cursor + dataSize + 12 * chunkCount;
+  if (cursorEnd > buffer.length) return null;
 
   var compressedChunkDataEnd = cursor + dataSize;
   var compressedChunkData = buffer.slice(cursor, compressedChunkDataEnd);
@@ -266,7 +271,7 @@ function readMapChunkBulk (buffer, offset) {
       compressedChunkData: compressedChunkData,
       meta: meta,
     },
-    size: endCursor - offset,
+    size: cursorEnd - offset,
   };
 }
 
@@ -448,28 +453,18 @@ function readSlot(buffer, offset) {
     };
   }
 
-  results = readByte(buffer, cursor);
-  if (! results) return null;
-  var itemCount = results.value;
-  cursor += results.size;
-
-  results = readShort(buffer, cursor);
-  if (! results) return null;
-  var itemDamage = results.value;
-  cursor += results.size;
-
-  results = readShort(buffer, cursor);
-  if (! results) return null;
-  var nbtDataSize = results.value;
-  cursor += results.size;
-
+  var cursorEnd = cursor + 5;
+  if (cursorEnd > buffer.length) return null;
+  var itemCount = buffer.readInt8(cursor);
+  var itemDamage = buffer.readInt16BE(cursor + 1);
+  var nbtDataSize = buffer.readInt16BE(cursor + 3);
   if (nbtDataSize === -1) nbtDataSize = 0;
-  var nbtDataEnd = cursor + nbtDataSize;
-  var nbtData = buffer.slice(cursor, nbtDataEnd);
+  var nbtDataEnd = cursorEnd + nbtDataSize;
+  var nbtData = buffer.slice(cursorEnd, nbtDataEnd);
 
   return {
     value: {
-      blockId: blockId,
+      id: blockId,
       itemCount: itemCount,
       itemDamage: itemDamage,
       nbtData: nbtData,
@@ -478,6 +473,22 @@ function readSlot(buffer, offset) {
   };
 }
 
+function SlotWriter(value) {
+  this.value = value;
+  this.size = value.id === -1 ? 2 : 7 + this.value.nbtData.length;
+}
+
+SlotWriter.prototype.write = function(buffer, offset) {
+  buffer.writeInt16BE(this.value.id, offset);
+  if (this.value.id === -1) return;
+  buffer.writeInt8(this.value.itemCount, offset + 2);
+  buffer.writeInt16BE(this.value.itemDamage, offset + 3);
+  var nbtDataSize = this.value.nbtData.length;
+  if (nbtDataSize === 0) nbtDataSize = -1; // I don't know wtf mojang smokes
+  buffer.writeInt16BE(nbtDataSize, offset + 5);
+  this.value.nbtData.copy(buffer, offset + 7);
+};
+
 function StringWriter(value) {
   this.value = value;
   this.encoded = toUcs2.convert(value);
@@ -509,6 +520,15 @@ ByteWriter.prototype.write = function(buffer, offset) {
   buffer.writeInt8(this.value, offset);
 }
 
+function BoolWriter(value) {
+  this.value = value;
+  this.size = 1;
+}
+
+BoolWriter.prototype.write = function(buffer, offset) {
+  buffer.writeInt8(this.value ? 1 : 0, offset);
+}
+
 function UByteWriter(value) {
   this.value = value;
   this.size = 1;
@@ -518,6 +538,33 @@ UByteWriter.prototype.write = function(buffer, offset) {
   buffer.writeUInt8(this.value, offset);
 };
 
+function FloatWriter(value) {
+  this.value = value;
+  this.size = 4;
+}
+
+FloatWriter.prototype.write = function(buffer, offset) {
+  buffer.writeFloatBE(this.value, offset);
+}
+
+function DoubleWriter(value) {
+  this.value = value;
+  this.size = 8;
+}
+
+DoubleWriter.prototype.write = function(buffer, offset) {
+  buffer.writeDoubleBE(this.value, offset);
+}
+
+function ShortWriter(value) {
+  this.value = value;
+  this.size = 2;
+}
+
+ShortWriter.prototype.write = function(buffer, offset) {
+  buffer.writeInt16BE(this.value, offset);
+}
+
 function IntWriter(value) {
   this.value = value;
   this.size = 4;