Add SNES hardware registers and patches documentation

Core/ZS ROM MAP.txt

@@ -0,0 +1,47 @@
+Expanded space used by ZScream as of 02/28/2025
+
+Addresses are PC unless stated otherwise.
+
+ZS reserves everything up to 1.5MB or up to 0x150000
+And an additional 3 banks at the end of the 2.0MB 0x1E8000 to 0x1FFFFF
+
+0x100000 - 0x107FFF: 1 Bank
+    Nothing?
+
+0x108000 - 0x10FFFF: 1 Bank
+    Title screen data
+    Dungeon map data
+
+0x110000 - 0x117FFF: 1 Bank
+    Default room header location
+    Seems to have been some old dungeon object data expansion but that has since been moved.
+
+0x118000 - 0x11FFFF: 1 Bank
+    Seems to have been some old dungeon object data expansion but that has since been moved.
+
+0x120000 - 0x127FFF: 1 Bank
+    Expanded overlay data
+
+0x128000 - 0x12FFFF: 1 Bank
+    Custom collision data
+
+0x130000 - 0x137FFF: 1 Bank
+    Overworld map data overflow
+
+0x138000 - 0x13FFFF: 1 Bank
+    Expanded Dungeon object data
+
+0x140000 - 0x147FFF: 1 Bank
+    Custom overworld data
+
+0x148000 - 0x14FFFF: 1 Bank
+    Expanded Dungeon object data
+
+0x1E0000 - 0x1E7FFF: 1 Bank
+    Custom ASM Patches
+
+0x1E8000 - 0x1EFFFF: 1 Bank
+    Expanded Tile16 space
+
+0x1F0000 - 0x1FFFFF: 2 Banks
+    Edpanded Tile32 space