From aac1e09c72303b5a6de9bb9ce2b2dd6fe3805e77 Mon Sep 17 00:00:00 2001
From: "Eevee (Evelyn Woods)" <eevee.git@veekun.com>
Date: Fri, 1 Jan 2021 17:11:11 -0700
Subject: [PATCH] Add support for pgchip's magic number and ice block encoding

---
 js/format-dat.js | 6 +++++-
 js/main.js       | 9 ++++++++-
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/js/format-dat.js b/js/format-dat.js
index f322448..d2fd493 100644
--- a/js/format-dat.js
+++ b/js/format-dat.js
@@ -63,7 +63,7 @@ const TILE_ENCODING = {
     0x35: 'bogus_player_burned',
     0x36: 'wall_invisible',  // unused
     0x37: 'wall_invisible',  // unused
-    0x38: 'wall_invisible',  // unused
+    0x38: 'ice_block',       // unused, but co-opted by pgchip
     0x39: 'bogus_player_win',
     0x3a: 'bogus_player_win',
     0x3b: 'bogus_player_win',
@@ -352,6 +352,10 @@ export function parse_game(buf) {
         // OK
         // TODO tile world convention, use lynx rules
     }
+    else if (magic === 0x0003aaac) {
+        // OK
+        // TODO add in ice block i guess???
+    }
     else {
         throw new Error(`Unrecognized magic number ${magic.toString(16)}`);
     }
diff --git a/js/main.js b/js/main.js
index 1125be1..0f6d6c9 100644
--- a/js/main.js
+++ b/js/main.js
@@ -3137,7 +3137,14 @@ class Conductor {
             stored_game = c2g.wrap_individual_level(buf);
             identifier = null;
         }
-        else if (magic === '\xac\xaa\x02\x00' || magic == '\xac\xaa\x02\x01') {
+        else if (
+            // standard mscc DAT
+            magic === '\xac\xaa\x02\x00' ||
+            // tile world i think
+            magic === '\xac\xaa\x02\x01' ||
+            // pgchip, which adds ice blocks
+            magic === '\xac\xaa\x03\x00')
+        {
             stored_game = dat.parse_game(buf);
         }
         else if (magic === 'PK\x03\x04') {