From 18007f0e5389d6a68488cd0130e9aeca321b0420 Mon Sep 17 00:00:00 2001
From: Lior Halphon <LIJI32@gmail.com>
Date: Sat, 23 Oct 2021 23:28:54 +0300
Subject: [PATCH] MGB support

---
 BootROMs/dmg_boot.asm        |   4 +
 BootROMs/mgb_boot.asm        |   2 +
 Cocoa/Document.m             |   8 +
 Cocoa/MainMenu.xib           |   6 +
 Core/apu.c                   |  11 +-
 Core/gb.c                    |  29 ++-
 Core/gb.h                    |   2 +-
 Core/graphics/mgb_border.inc | 477 +++++++++++++++++++++++++++++++++++
 Core/memory.c                |  11 +-
 Core/save_state.c            |   1 +
 Core/sm83_cpu.c              |   2 +-
 Makefile                     |   8 +-
 SDL/gui.c                    |   2 +-
 SDL/gui.h                    |   1 +
 SDL/main.c                   |   1 +
 15 files changed, 551 insertions(+), 14 deletions(-)
 create mode 100644 BootROMs/mgb_boot.asm
 create mode 100644 Core/graphics/mgb_border.inc

diff --git a/BootROMs/dmg_boot.asm b/BootROMs/dmg_boot.asm
index 97a12e7..5517683 100644
--- a/BootROMs/dmg_boot.asm
+++ b/BootROMs/dmg_boot.asm
@@ -115,7 +115,11 @@ Start:
     call WaitBFrames
     
 ; Set registers to match the original DMG boot
+IF DEF(MGB)
+    ld hl, $FFB0
+ELSE
     ld hl, $01B0
+ENDC
     push hl
     pop af
     ld hl, $014D
diff --git a/BootROMs/mgb_boot.asm b/BootROMs/mgb_boot.asm
new file mode 100644
index 0000000..3a98aef
--- /dev/null
+++ b/BootROMs/mgb_boot.asm
@@ -0,0 +1,2 @@
+MGB EQU 1
+include "dmg_boot.asm"
\ No newline at end of file
diff --git a/Cocoa/Document.m b/Cocoa/Document.m
index 2a54a13..74fc98e 100644
--- a/Cocoa/Document.m
+++ b/Cocoa/Document.m
@@ -20,6 +20,7 @@ enum model {
     MODEL_CGB,
     MODEL_AGB,
     MODEL_SGB,
+    MODEL_MGB,
 };
 
 @interface Document ()
@@ -245,6 +246,9 @@ static void infraredStateChanged(GB_gameboy_t *gb, bool on)
             return model;
         }
         
+        case MODEL_MGB:
+            return GB_MODEL_MGB;
+        
         case MODEL_AGB:
             return GB_MODEL_AGB;
     }
@@ -606,6 +610,7 @@ static unsigned *multiplication_table_for_frequency(unsigned frequency)
         [[NSUserDefaults standardUserDefaults] setBool:current_model == MODEL_DMG forKey:@"EmulateDMG"];
         [[NSUserDefaults standardUserDefaults] setBool:current_model == MODEL_SGB forKey:@"EmulateSGB"];
         [[NSUserDefaults standardUserDefaults] setBool:current_model == MODEL_AGB forKey:@"EmulateAGB"];
+        [[NSUserDefaults standardUserDefaults] setBool:current_model == MODEL_MGB forKey:@"EmulateMGB"];
     }
     
     /* Reload the ROM, SAV and SYM files */
@@ -779,6 +784,9 @@ static unsigned *multiplication_table_for_frequency(unsigned frequency)
     else if ([[NSUserDefaults standardUserDefaults] boolForKey:@"EmulateSGB"]) {
         current_model = MODEL_SGB;
     }
+    else if ([[NSUserDefaults standardUserDefaults] boolForKey:@"EmulateMGB"]) {
+        current_model = MODEL_MGB;
+    }
     else {
         current_model = [[NSUserDefaults standardUserDefaults] boolForKey:@"EmulateAGB"]? MODEL_AGB : MODEL_CGB;
     }
diff --git a/Cocoa/MainMenu.xib b/Cocoa/MainMenu.xib
index 348e960..ca15de4 100644
--- a/Cocoa/MainMenu.xib
+++ b/Cocoa/MainMenu.xib
@@ -339,6 +339,12 @@
                                     <action selector="reset:" target="-1" id="rxG-cz-s1S"/>
                                 </connections>
                             </menuItem>
+                            <menuItem title="Game Boy Pocket/Light" tag="5" id="1bM-CT-hoW">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <connections>
+                                    <action selector="reset:" target="-1" id="U7l-BM-kB1"/>
+                                </connections>
+                            </menuItem>
                             <menuItem title="Super Game Boy" tag="4" id="vc7-yy-ARW">
                                 <modifierMask key="keyEquivalentModifierMask"/>
                                 <connections>
diff --git a/Core/apu.c b/Core/apu.c
index 537ae01..c40ce61 100644
--- a/Core/apu.c
+++ b/Core/apu.c
@@ -303,11 +303,6 @@ static inline void update_wave_sample(GB_gameboy_t *gb, unsigned cycles)
     }
 }
 
-/* the effects of NRX2 writes on current volume are not well documented and differ
-   between models and variants. The exact behavior can only be verified on CGB as it
-   requires the PCM12 register. The behavior implemented here was verified on *my*
-   CGB, which might behave differently from other CGB revisions, as well as from the
-   DMG, MGB or SGB/2 */
 static void _nrx2_glitch(uint8_t *volume, uint8_t value, uint8_t old_value, uint8_t *countdown, GB_envelope_clock_t *lock)
 {
     if (lock->clock) {
@@ -868,6 +863,7 @@ static inline uint16_t effective_channel4_counter(GB_gameboy_t *gb)
             break;
 #endif
         case GB_MODEL_DMG_B:
+        case GB_MODEL_MGB:
         case GB_MODEL_SGB_NTSC:
         case GB_MODEL_SGB_PAL:
         case GB_MODEL_SGB_NTSC_NO_SFC:
@@ -1232,10 +1228,13 @@ void GB_apu_write(GB_gameboy_t *gb, uint8_t reg, uint8_t value)
                        DMG-B:     Most of them behave as emulated. A few behave differently.
                        SGB:       As far as I know, all tested instances behave as emulated.
                        MGB, SGB2: Most instances behave non-deterministically, a few behave as emulated.
+                     
+                       For DMG-B emulation I emulate the most common behavior, which blargg's tests expect (not my own DMG-B, which fails it)
+                       For MGB emulation, I emulate my Game Boy Light, which happens to be deterministic.
 
                       Additionally, I believe DMGs, including those we behave differently than emulated,
                       are all deterministic. */
-                    if (offset < 4) {
+                    if (offset < 4 && gb->model != GB_MODEL_MGB) {
                         gb->io_registers[GB_IO_WAV_START] = gb->io_registers[GB_IO_WAV_START + offset];
                     }
                     else {
diff --git a/Core/gb.c b/Core/gb.c
index a845797..6bd1f50 100644
--- a/Core/gb.c
+++ b/Core/gb.c
@@ -125,6 +125,17 @@ static void load_default_border(GB_gameboy_t *gb)
         #include "graphics/agb_border.inc"
         LOAD_BORDER();
     }
+    else if (gb->model == GB_MODEL_MGB) {
+        #include "graphics/mgb_border.inc"
+        LOAD_BORDER();
+        if (gb->dmg_palette &&
+            gb->dmg_palette->colors[4].b > gb->dmg_palette->colors[4].r) {
+            for (unsigned i = 0; i < 7; i++) {
+                gb->borrowed_border.map[13 + 24 * 32 + i] = i + 1;
+                gb->borrowed_border.map[13 + 25 * 32 + i] = i + 8;
+            }
+        }
+    }
     else if (GB_is_cgb(gb)) {
         #include "graphics/cgb_border.inc"
         LOAD_BORDER();
@@ -1420,6 +1431,7 @@ void GB_set_user_data(GB_gameboy_t *gb, void *data)
 static void reset_ram(GB_gameboy_t *gb)
 {
     switch (gb->model) {
+        case GB_MODEL_MGB:
         case GB_MODEL_CGB_E:
         case GB_MODEL_AGB: /* Unverified */
             for (unsigned i = 0; i < gb->ram_size; i++) {
@@ -1475,6 +1487,7 @@ static void reset_ram(GB_gameboy_t *gb)
             break;
             
         case GB_MODEL_DMG_B:
+        case GB_MODEL_MGB:
         case GB_MODEL_SGB_NTSC: /* Unverified*/
         case GB_MODEL_SGB_PAL: /* Unverified */
         case GB_MODEL_SGB_NTSC_NO_SFC: /* Unverified */
@@ -1501,6 +1514,7 @@ static void reset_ram(GB_gameboy_t *gb)
             break;
             
         case GB_MODEL_DMG_B:
+        case GB_MODEL_MGB:
         case GB_MODEL_SGB_NTSC: /* Unverified */
         case GB_MODEL_SGB_PAL: /* Unverified */
         case GB_MODEL_SGB_NTSC_NO_SFC: /* Unverified */
@@ -1528,7 +1542,17 @@ static void reset_ram(GB_gameboy_t *gb)
         case GB_MODEL_AGB:
             /* Initialized by CGB-A and newer, 0s in CGB-0*/
             break;
-            
+        case GB_MODEL_MGB: {
+            for (unsigned i = 0; i < GB_IO_WAV_END - GB_IO_WAV_START; i++) {
+                if (i & 1) {
+                    gb->io_registers[GB_IO_WAV_START + i] = GB_random() & GB_random();
+                }
+                else {
+                    gb->io_registers[GB_IO_WAV_START + i] = GB_random() | GB_random();
+                }
+            }
+            break;
+        }
         case GB_MODEL_DMG_B:
         case GB_MODEL_SGB_NTSC: /* Unverified*/
         case GB_MODEL_SGB_PAL: /* Unverified */
@@ -1572,6 +1596,9 @@ static void request_boot_rom(GB_gameboy_t *gb)
             case GB_MODEL_DMG_B:
                 type = GB_BOOT_ROM_DMG;
                 break;
+            case GB_MODEL_MGB:
+                type = GB_BOOT_ROM_MGB;
+                break;
             case GB_MODEL_SGB_NTSC:
             case GB_MODEL_SGB_PAL:
             case GB_MODEL_SGB_NTSC_NO_SFC:
diff --git a/Core/gb.h b/Core/gb.h
index ea4fe7d..0a1b358 100644
--- a/Core/gb.h
+++ b/Core/gb.h
@@ -127,7 +127,7 @@ typedef enum {
     GB_MODEL_SGB_NTSC_NO_SFC = GB_MODEL_SGB | GB_MODEL_NO_SFC_BIT,
     GB_MODEL_SGB_NO_SFC = GB_MODEL_SGB_NTSC_NO_SFC,
     GB_MODEL_SGB_PAL_NO_SFC = GB_MODEL_SGB | GB_MODEL_NO_SFC_BIT | GB_MODEL_PAL_BIT,
-    // GB_MODEL_MGB = 0x100,
+    GB_MODEL_MGB = 0x100,
     GB_MODEL_SGB2 = 0x101,
     GB_MODEL_SGB2_NO_SFC = GB_MODEL_SGB2 | GB_MODEL_NO_SFC_BIT,
     // GB_MODEL_CGB_0 = 0x200,
diff --git a/Core/graphics/mgb_border.inc b/Core/graphics/mgb_border.inc
new file mode 100644
index 0000000..f19ed8a
--- /dev/null
+++ b/Core/graphics/mgb_border.inc
@@ -0,0 +1,477 @@
+static const uint16_t palette[] = {
+    0x0000, 0x0000, 0x0011, 0x001A, 0x39CE, 0x6B5A, 0x739C, 0x5265,
+    0x3DC5, 0x2924, 0x18A4, 0x20E6, 0x2D49, 0x1484, 0x5694, 0x20EC, 
+};
+
+       
+static const uint16_t tilemap[] = {
+    0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F,
+    0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F,
+    0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F,
+    0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F,
+    0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F,
+    0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F,
+    0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F,
+    0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F,
+    0x000F, 0x0010, 0x0011, 0x0012, 0x0012, 0x0012, 0x0012, 0x0012,
+    0x0012, 0x0012, 0x0012, 0x0012, 0x0012, 0x0012, 0x0012, 0x0012,
+    0x0012, 0x0012, 0x0012, 0x0012, 0x0012, 0x0012, 0x0012, 0x0012,
+    0x0012, 0x0012, 0x0012, 0x0012, 0x0012, 0x4011, 0x4010, 0x000F,
+    0x000F, 0x0013, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014,
+    0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014,
+    0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014,
+    0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x4013, 0x000F,
+    0x000F, 0x0015, 0x0014, 0x0014, 0x0014, 0x0016, 0x0017, 0x0017,
+    0x0017, 0x0017, 0x0017, 0x0017, 0x0017, 0x0017, 0x0017, 0x0017,
+    0x0017, 0x0017, 0x0017, 0x0017, 0x0017, 0x0017, 0x0017, 0x0017,
+    0x0017, 0x0017, 0x4016, 0x0014, 0x0014, 0x0014, 0x4015, 0x000F,
+    0x000F, 0x0015, 0x0014, 0x0014, 0x0014, 0x0018, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x4018, 0x0014, 0x0014, 0x0014, 0x4015, 0x000F,
+    0x000F, 0x0015, 0x0014, 0x0014, 0x0014, 0x0018, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x4018, 0x0014, 0x0014, 0x0014, 0x4015, 0x000F,
+    0x000F, 0x0015, 0x0014, 0x0014, 0x0014, 0x0018, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x4018, 0x0014, 0x0014, 0x0014, 0x4015, 0x000F,
+    0x000F, 0x0015, 0x0014, 0x0014, 0x0014, 0x0018, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x4018, 0x0014, 0x0014, 0x0014, 0x4015, 0x000F,
+    0x000F, 0x0015, 0x0014, 0x0014, 0x0014, 0x0018, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x4018, 0x0014, 0x0014, 0x0014, 0x4015, 0x000F,
+    0x000F, 0x0015, 0x0019, 0x001A, 0x4019, 0x0018, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x4018, 0x0014, 0x0014, 0x0014, 0x4015, 0x000F,
+    0x000F, 0x0015, 0x8019, 0x001B, 0xC019, 0x0018, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x4018, 0x0014, 0x0014, 0x0014, 0x4015, 0x000F,
+    0x000F, 0x0015, 0x0014, 0x0014, 0x0014, 0x0018, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x4018, 0x0014, 0x0014, 0x0014, 0x4015, 0x000F,
+    0x000F, 0x0015, 0x0014, 0x0014, 0x0014, 0x0018, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x4018, 0x0014, 0x0014, 0x0014, 0x4015, 0x000F,
+    0x000F, 0x0015, 0x0014, 0x0014, 0x0014, 0x0018, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x4018, 0x0014, 0x0014, 0x0014, 0x4015, 0x000F,
+    0x000F, 0x0015, 0x0014, 0x0014, 0x0014, 0x0018, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x4018, 0x0014, 0x0014, 0x0014, 0x4015, 0x000F,
+    0x000F, 0x0015, 0x0014, 0x0014, 0x0014, 0x0018, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x4018, 0x0014, 0x0014, 0x0014, 0x4015, 0x000F,
+    0x000F, 0x0015, 0x0014, 0x0014, 0x0014, 0x0018, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x4018, 0x0014, 0x0014, 0x0014, 0x4015, 0x000F,
+    0x000F, 0x0015, 0x0014, 0x0014, 0x0014, 0x0018, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x4018, 0x0014, 0x0014, 0x0014, 0x4015, 0x000F,
+    0x000F, 0x0015, 0x0014, 0x0014, 0x0014, 0x0018, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x4018, 0x0014, 0x0014, 0x0014, 0x4015, 0x000F,
+    0x000F, 0x0015, 0x0014, 0x0014, 0x0014, 0x0018, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x4018, 0x0014, 0x0014, 0x0014, 0x4015, 0x000F,
+    0x000F, 0x0015, 0x0014, 0x0014, 0x0014, 0x0018, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x4018, 0x0014, 0x0014, 0x0014, 0x4015, 0x000F,
+    0x000F, 0x0015, 0x0014, 0x0014, 0x0014, 0x0018, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x4018, 0x0014, 0x0014, 0x0014, 0x4015, 0x000F,
+    0x000F, 0x0015, 0x0014, 0x0014, 0x0014, 0x001C, 0x001D, 0x001D,
+    0x001D, 0x001D, 0x001D, 0x001D, 0x001D, 0x001D, 0x001D, 0x001D,
+    0x001D, 0x001D, 0x001D, 0x001D, 0x001D, 0x001D, 0x001D, 0x001D,
+    0x001D, 0x001D, 0x401C, 0x0014, 0x0014, 0x0014, 0x001E, 0x000F,
+    0x000F, 0x0015, 0x0014, 0x001F, 0x0020, 0x0021, 0x0022, 0x0023,
+    0x0024, 0x0025, 0x0026, 0x0027, 0x0028, 0x0029, 0x002A, 0x002B,
+    0x002C, 0x002D, 0x002E, 0x002F, 0x0014, 0x0014, 0x0014, 0x0014,
+    0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0030, 0x0031, 0x000F,
+    0x000F, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, 0x0038,
+    0x0039, 0x003A, 0x003B, 0x003C, 0x003D, 0x003E, 0x003F, 0x0040,
+    0x0041, 0x0042, 0x0043, 0x0044, 0x0014, 0x0014, 0x0014, 0x0014,
+    0x0014, 0x0014, 0x0014, 0x0014, 0x0045, 0x0046, 0x000F, 0x000F,
+    0x000F, 0x0047, 0x0048, 0x0049, 0x0049, 0x0049, 0x0049, 0x0049,
+    0x0049, 0x0049, 0x0049, 0x0049, 0x0049, 0x0049, 0x0049, 0x0049,
+    0x0049, 0x0049, 0x0049, 0x0049, 0x0049, 0x0049, 0x0049, 0x0049,
+    0x0049, 0x0049, 0x004A, 0x004B, 0x004C, 0x000F, 0x000F, 0x000F,
+    0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F,
+    0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F,
+    0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F,
+    0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F, 0x000F,
+};
+
+
+
+const uint8_t tiles[] = {
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0xFF, 0x00, 0x3D,
+    0x42, 0x7F, 0x81, 0xFF, 0x01, 0xFD, 0x01,
+    0xFD, 0x01, 0xFF, 0x03, 0xFF, 0x03, 0xFF,
+    0xFF, 0xBC, 0x7F, 0xFD, 0xFE, 0xFD, 0xFE,
+    0xFD, 0xFE, 0xFD, 0xFE, 0xFF, 0xFC, 0xFF,
+    0xFC, 0xFF, 0x00, 0xBF, 0x41, 0xFE, 0xC0,
+    0xBF, 0xC1, 0xFF, 0x81, 0x7D, 0x03, 0x7F,
+    0x01, 0x7F, 0x01, 0xFF, 0xFF, 0x3E, 0xFF,
+    0xBE, 0x7F, 0xBF, 0x7E, 0xFF, 0x7E, 0x7D,
+    0xFE, 0x7D, 0xFE, 0x7D, 0xFE, 0xFF, 0x00,
+    0xFF, 0x00, 0xBF, 0x83, 0xBF, 0x87, 0xFC,
+    0x8D, 0xED, 0x8E, 0xDB, 0xF8, 0xBF, 0xD8,
+    0xFF, 0xFF, 0x3E, 0xFF, 0xBB, 0x7C, 0xB7,
+    0x78, 0xAC, 0x73, 0xAD, 0x73, 0x9B, 0x67,
+    0x9B, 0x67, 0xFF, 0x00, 0xB7, 0x08, 0xFF,
+    0xF8, 0x3F, 0x38, 0xFF, 0x08, 0xFE, 0x01,
+    0x87, 0x00, 0xFB, 0x78, 0xFF, 0xFF, 0x07,
+    0xFF, 0xFB, 0x07, 0x3B, 0xC7, 0xE7, 0xFF,
+    0xFE, 0xFF, 0x82, 0xFF, 0xFA, 0x87, 0xFF,
+    0x00, 0xFE, 0x81, 0x5F, 0x40, 0xDE, 0xC0,
+    0xFE, 0xC0, 0xE0, 0xDE, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0x1E, 0xFF, 0x5E, 0xBF,
+    0xDE, 0x3F, 0xDE, 0x3F, 0xC0, 0x3F, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xCF, 0x30,
+    0xDF, 0xEF, 0xFF, 0xCF, 0xFF, 0xC1, 0xBD,
+    0x81, 0xBD, 0x81, 0xFF, 0x83, 0xFF, 0xFF,
+    0x00, 0xFF, 0xCF, 0x30, 0xEF, 0x30, 0xFD,
+    0x3E, 0xBD, 0x7E, 0xBD, 0x7E, 0xBF, 0x7C,
+    0xFF, 0x00, 0xFF, 0x08, 0xF7, 0xF0, 0xFF,
+    0xF0, 0xBF, 0xC0, 0xFF, 0x80, 0x7F, 0x00,
+    0x7F, 0x00, 0xFF, 0xFF, 0x07, 0xFF, 0xF7,
+    0x0F, 0xF7, 0x0F, 0xBF, 0x7F, 0xFF, 0x7F,
+    0x7F, 0xFF, 0x7F, 0xFF, 0xFB, 0x07, 0xFF,
+    0x03, 0xFF, 0x03, 0xFB, 0x03, 0xFB, 0x03,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFB,
+    0xFC, 0xFB, 0xFC, 0xFB, 0xFC, 0xFB, 0xFC,
+    0xFB, 0xFC, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFD, 0x01, 0xFD, 0x81, 0xFF, 0x0B,
+    0xF7, 0xF3, 0xFB, 0xF7, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x00, 0x7D, 0xFE, 0x7D, 0xFE,
+    0x07, 0xFC, 0xF7, 0x0C, 0xF3, 0x0C, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x98,
+    0x7B, 0x38, 0x7C, 0x1D, 0xFF, 0x0F, 0xFB,
+    0x0B, 0xFD, 0x03, 0xFF, 0x00, 0xFF, 0x00,
+    0xDB, 0x67, 0x5B, 0xE7, 0x7C, 0xE3, 0x6F,
+    0xF0, 0x73, 0xFC, 0xFC, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0x9E, 0x18, 0xFE, 0x3C, 0x5A,
+    0xDC, 0xFF, 0xF9, 0xED, 0xE3, 0xBF, 0xC0,
+    0xFF, 0x00, 0xFF, 0x00, 0x9A, 0xE7, 0xDA,
+    0xE7, 0x1A, 0xE7, 0xFF, 0x06, 0xE5, 0x1E,
+    0x3F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC3,
+    0xFD, 0xBF, 0x81, 0xBF, 0x81, 0xBD, 0x81,
+    0xFD, 0x81, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
+    0x00, 0xC1, 0x3E, 0xBD, 0x7E, 0xBD, 0x7E,
+    0xBD, 0x7E, 0xBD, 0x7E, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0x83, 0xBB, 0xC7,
+    0xFF, 0x83, 0xFF, 0x83, 0x7B, 0x03, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xBF, 0x7C,
+    0xBB, 0x7C, 0xFB, 0x7C, 0xFB, 0x7C, 0x7B,
+    0xFC, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x80, 0x7F,
+    0x80, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0x7F, 0xFF, 0x7F, 0xFF, 0x7F,
+    0xFF, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x00, 0xFE, 0x00, 0xF9, 0x00,
+    0xF7, 0x00, 0xEE, 0x00, 0xDD, 0x04, 0xDF,
+    0x04, 0xBF, 0x08, 0xFF, 0x00, 0xFF, 0x01,
+    0xFF, 0x07, 0xFF, 0x0F, 0xFF, 0x1F, 0xFB,
+    0x3F, 0xFB, 0x3F, 0xF7, 0x7F, 0x80, 0x00,
+    0x7F, 0x00, 0xFF, 0x00, 0x80, 0x00, 0x7F,
+    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0xFF,
+    0x00, 0x00, 0x00, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xBF,
+    0x08, 0xFF, 0x10, 0xFF, 0x10, 0xFF, 0x10,
+    0xFF, 0x10, 0xFF, 0x10, 0xFF, 0x10, 0xFF,
+    0x10, 0xF7, 0x7F, 0xEF, 0x7F, 0xEF, 0x7F,
+    0xEF, 0x7F, 0xEF, 0x7F, 0xEF, 0x7F, 0xEF,
+    0x7F, 0xEF, 0x7F, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0x10, 0xFF, 0x10, 0xFF, 0x10, 0xFF,
+    0x10, 0xFF, 0x10, 0xFF, 0x10, 0xFF, 0x10,
+    0xFF, 0x10, 0xEF, 0x7F, 0xEF, 0x7F, 0xEF,
+    0x7F, 0xEF, 0x7F, 0xEF, 0x7F, 0xEF, 0x7F,
+    0xEF, 0x7F, 0xEF, 0x7F, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE,
+    0xFE, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
+    0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
+    0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
+    0xFE, 0xFE, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x01,
+    0xFF, 0x01, 0xFF, 0x01, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xC3, 0x7E,
+    0xBD, 0xFF, 0x66, 0xFF, 0x7E, 0xFF, 0x7E,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xC3, 0xFF, 0x81, 0xC3, 0x18, 0x81, 0x00,
+    0x00, 0x00, 0x00, 0x7E, 0xFF, 0x3C, 0xFF,
+    0x00, 0x7E, 0x81, 0xBD, 0xC3, 0x42, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x81, 0x00, 0xC3, 0x81, 0xFF,
+    0xC3, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0x01, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0x08, 0xFD, 0x12, 0xFD, 0x12,
+    0xFD, 0x12, 0xFD, 0x12, 0xFB, 0x24, 0xFB,
+    0x24, 0xFB, 0x24, 0xF7, 0xFE, 0xEF, 0xFC,
+    0xEF, 0xFC, 0xEF, 0xFC, 0xEF, 0xFC, 0xDF,
+    0xF8, 0xDF, 0xF8, 0xDF, 0xF8, 0xFF, 0x00,
+    0xF0, 0x1E, 0xC0, 0x3F, 0x8D, 0x72, 0x0E,
+    0xF3, 0x8F, 0xF0, 0x01, 0xFC, 0xA0, 0x1E,
+    0xFF, 0xFF, 0xEF, 0xFF, 0xFF, 0xE0, 0xFF,
+    0xC0, 0x7C, 0x9F, 0x7F, 0x9F, 0x7F, 0x87,
+    0xFF, 0xC0, 0xFF, 0x00, 0xFC, 0x00, 0x78,
+    0x87, 0x78, 0x87, 0xF0, 0x07, 0xF8, 0x07,
+    0xE2, 0x0F, 0xE2, 0x1C, 0xFF, 0xFF, 0xFF,
+    0xFE, 0xFB, 0xFC, 0x7F, 0xFC, 0xFF, 0xF8,
+    0xFF, 0xF2, 0xFD, 0xF3, 0xFF, 0xE6, 0xFF,
+    0x00, 0x7C, 0x02, 0xFC, 0x01, 0x3C, 0xC3,
+    0x3C, 0x83, 0x3E, 0xC1, 0x3C, 0xC3, 0x18,
+    0xC7, 0xFF, 0xFF, 0xFD, 0xFE, 0xFF, 0x7C,
+    0xBF, 0x7E, 0xFF, 0x3E, 0xFF, 0x7C, 0xFF,
+    0x3C, 0xFB, 0x3C, 0xFF, 0x00, 0x1E, 0x01,
+    0x1E, 0xE1, 0x1E, 0xE3, 0x1C, 0xF3, 0x0C,
+    0xE7, 0x08, 0xF7, 0x19, 0x6F, 0xFF, 0xFF,
+    0xFE, 0x3F, 0xFF, 0x3F, 0xFD, 0x1E, 0xEF,
+    0x1E, 0xFB, 0x8C, 0xFF, 0xDD, 0xF6, 0x49,
+    0xFF, 0x00, 0x18, 0x14, 0x08, 0xE3, 0x08,
+    0xE3, 0x18, 0xF7, 0x1D, 0xE2, 0x18, 0xE7,
+    0xB8, 0x47, 0xFF, 0xFF, 0xEB, 0x1C, 0xFF,
+    0x0C, 0xFF, 0x18, 0xEF, 0x1C, 0xFF, 0x98,
+    0xFF, 0x98, 0xFF, 0x18, 0xFF, 0x00, 0x06,
+    0x05, 0x02, 0xF8, 0x02, 0xF9, 0xFE, 0x01,
+    0xFF, 0x00, 0x06, 0xF9, 0x04, 0xF3, 0xFF,
+    0xFF, 0xFA, 0x07, 0xFF, 0x02, 0xFF, 0x07,
+    0xFF, 0xFF, 0xFF, 0xFE, 0xFF, 0x0E, 0xFD,
+    0x06, 0xFF, 0x00, 0x03, 0x00, 0x01, 0xFF,
+    0x30, 0xCF, 0x70, 0x8F, 0x30, 0xC6, 0x21,
+    0xDC, 0x01, 0xFE, 0xFF, 0xFF, 0xFF, 0x0F,
+    0xFE, 0x01, 0xFF, 0x01, 0xF7, 0x39, 0xFF,
+    0x79, 0xFF, 0x01, 0xFF, 0x03, 0xFF, 0x00,
+    0xF8, 0x01, 0xF0, 0x1F, 0xE1, 0x3E, 0x83,
+    0x78, 0x87, 0x30, 0xCF, 0x30, 0x8F, 0x70,
+    0xFF, 0xFF, 0xFF, 0xFD, 0xEF, 0xF8, 0xDF,
+    0xE0, 0xBF, 0xC3, 0xFF, 0x87, 0xFF, 0x8F,
+    0xFF, 0x9F, 0xFF, 0x00, 0x3C, 0xA0, 0x0C,
+    0xE1, 0x07, 0xF0, 0x86, 0x38, 0xC7, 0x3C,
+    0xC3, 0x18, 0xC7, 0x3C, 0xFF, 0xFF, 0xDF,
+    0xBE, 0xFF, 0x0C, 0xFF, 0x06, 0xFF, 0x87,
+    0xFB, 0xE7, 0xFF, 0xC7, 0xFB, 0xE7, 0xFF,
+    0x00, 0x7C, 0x40, 0x78, 0x83, 0x39, 0xEE,
+    0x19, 0xE7, 0x81, 0x7C, 0x03, 0x78, 0xC7,
+    0x38, 0xFF, 0xFF, 0xBF, 0x7E, 0xFF, 0x38,
+    0xD7, 0x38, 0xFE, 0x31, 0xFF, 0x13, 0xFF,
+    0x83, 0xFF, 0x8F, 0xFF, 0x00, 0x3C, 0x43,
+    0x7C, 0x83, 0xFC, 0x03, 0xFC, 0x03, 0xFC,
+    0x03, 0xFD, 0x02, 0xFC, 0x03, 0xFF, 0xFF,
+    0xBF, 0x7C, 0xFF, 0xFC, 0xFF, 0xFC, 0xFF,
+    0xFC, 0xFF, 0xFC, 0xFF, 0xFC, 0xFF, 0xFD,
+    0xFF, 0x00, 0x00, 0xFF, 0x00, 0xFF, 0x04,
+    0xA3, 0xFD, 0xB6, 0x8C, 0x3A, 0x8B, 0x7C,
+    0x99, 0x62, 0xFF, 0xFF, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0xF8, 0x4B, 0xFC, 0xF7, 0xCC,
+    0xF3, 0xCD, 0xFF, 0xCB, 0xFF, 0x00, 0x00,
+    0xFF, 0x00, 0xFF, 0x90, 0x3F, 0xD8, 0x46,
+    0x09, 0xF6, 0x0D, 0xF1, 0x12, 0xF4, 0xFF,
+    0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xCF, 0x78,
+    0xBF, 0xD9, 0x7F, 0x9F, 0xFE, 0x9B, 0xEF,
+    0x9B, 0xFF, 0x00, 0x00, 0xFC, 0x02, 0xFC,
+    0x46, 0x59, 0x13, 0xAC, 0x82, 0x68, 0x07,
+    0xFC, 0x14, 0xE8, 0xFF, 0xFF, 0xFF, 0x03,
+    0xFF, 0x02, 0xBF, 0x73, 0x5F, 0xB6, 0xFF,
+    0x23, 0xFB, 0x07, 0xFF, 0x26, 0xFF, 0x00,
+    0x00, 0xFF, 0x00, 0xFF, 0x03, 0x9F, 0x21,
+    0x55, 0x48, 0xB7, 0x8F, 0x60, 0x80, 0x6F,
+    0xFF, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFC,
+    0x27, 0xBA, 0xCD, 0x7F, 0x9D, 0xFF, 0x8F,
+    0xF7, 0xD8, 0xFF, 0x00, 0x00, 0xFF, 0x0C,
+    0xF3, 0x18, 0xF3, 0xD8, 0x2F, 0x90, 0x67,
+    0xB0, 0x4F, 0x10, 0xEF, 0xFF, 0xFF, 0xFF,
+    0x08, 0xFF, 0x18, 0xEF, 0xBC, 0xF7, 0xBC,
+    0xFF, 0xD0, 0xFF, 0xD8, 0xFF, 0x30, 0xFF,
+    0x00, 0x7F, 0x80, 0x7F, 0x80, 0x7F, 0x80,
+    0x7F, 0x80, 0x7F, 0x80, 0x7F, 0x80, 0x7F,
+    0x80, 0xFF, 0xFF, 0xFF, 0x7F, 0xFF, 0x7F,
+    0xFF, 0x7F, 0xFF, 0x7F, 0xFF, 0x7F, 0xFF,
+    0x7F, 0xFF, 0x7F, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x01, 0xFF,
+    0x02, 0xFF, 0x04, 0xFF, 0x08, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE,
+    0xFF, 0xFD, 0xFF, 0xFB, 0xFF, 0xF7, 0xFF,
+    0xF7, 0x48, 0xF7, 0x48, 0xEF, 0x90, 0xEF,
+    0x90, 0xDF, 0x20, 0xBF, 0x40, 0xBF, 0x40,
+    0x7F, 0x80, 0xBF, 0xF0, 0xBF, 0xF0, 0x7F,
+    0xE0, 0x7F, 0xE0, 0xFF, 0xC0, 0xFF, 0x80,
+    0xFF, 0x80, 0xFF, 0x00, 0xFF, 0x10, 0xFF,
+    0x10, 0xFF, 0x10, 0xFF, 0x10, 0xFF, 0x10,
+    0xFF, 0x10, 0xFF, 0x10, 0xBF, 0x48, 0xEF,
+    0x7F, 0xEF, 0x7F, 0xEF, 0x7F, 0xEF, 0x7F,
+    0xEF, 0x7F, 0xEF, 0x7F, 0xEF, 0x7F, 0xF7,
+    0x3F, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
+    0xFE, 0x00, 0xFE, 0x01, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xE0, 0x0F,
+    0xF8, 0x07, 0x00, 0x57, 0x01, 0xFF, 0x05,
+    0xF8, 0x87, 0x48, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0xF8, 0xFF, 0xFC, 0xEF, 0x99, 0xFE,
+    0x01, 0xFF, 0x83, 0xB7, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xC0, 0x3F, 0x80, 0x7F, 0x80,
+    0x7F, 0x0F, 0x70, 0x8F, 0x70, 0xFF, 0x00,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0xE7, 0xBF,
+    0xC0, 0xFF, 0xCF, 0xFF, 0x9F, 0xEF, 0x1F,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x18,
+    0xE3, 0x18, 0xE3, 0x98, 0x77, 0x08, 0x67,
+    0x1D, 0xE2, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x3C, 0xFF, 0x18, 0xEF, 0x1C,
+    0xFF, 0x0C, 0x7F, 0x88, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0x01, 0x3E, 0xC2, 0xFF,
+    0xC2, 0x3C, 0xE2, 0x18, 0xC6, 0x39, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x8B,
+    0x3C, 0xC3, 0xFF, 0xC7, 0xFF, 0xC6, 0xFF,
+    0xEF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0x18, 0xEF, 0x10, 0xE6, 0x10, 0xC6, 0x30,
+    0xEF, 0x30, 0xCF, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0xF7, 0x39, 0xFF, 0x39, 0xFF,
+    0x10, 0xDF, 0x38, 0xFF, 0x38, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0x0C, 0x09, 0xFC,
+    0x01, 0x0C, 0x0B, 0x04, 0xFB, 0x06, 0xF1,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xF7,
+    0x0E, 0xFF, 0xFC, 0xF7, 0x0E, 0xFF, 0x0E,
+    0xFF, 0x04, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0x00, 0xCE, 0x70, 0xCF, 0x70, 0xFE,
+    0x01, 0xFE, 0x0B, 0xF0, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0x69, 0xB7, 0x79,
+    0x8F, 0x79, 0xFF, 0x03, 0xFF, 0x03, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x8F, 0x70,
+    0x87, 0x78, 0x88, 0x72, 0x80, 0x7F, 0xC0,
+    0x3F, 0xFC, 0x05, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x9F, 0xF7, 0x8F, 0xFD, 0xC7, 0xBF,
+    0xC0, 0xDF, 0xF0, 0xFA, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xE7, 0x18, 0x87, 0x38, 0x17,
+    0xE8, 0x1F, 0xF0, 0x3F, 0xC0, 0xFF, 0x00,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0xC7, 0xFF,
+    0x8F, 0xF7, 0x8F, 0xEF, 0x1F, 0xFF, 0x7F,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x87,
+    0x78, 0x8F, 0x70, 0xDF, 0x20, 0x8F, 0x70,
+    0x8F, 0x70, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
+    0x00, 0xF7, 0xCF, 0xFF, 0xCF, 0xFF, 0x8F,
+    0xFF, 0x9F, 0xFF, 0x9F, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFC, 0x02, 0xFD, 0x03,
+    0xFD, 0x02, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0xFC,
+    0xFE, 0xFD, 0xFF, 0xFD, 0xFF, 0xFD, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0x9F, 0x30, 0xA0, 0x9E, 0x00, 0x7F, 0x00,
+    0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0xEF, 0xF9, 0x6F, 0xF8, 0xFF,
+    0x00, 0xFF, 0x80, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0x90, 0xCF, 0xE1,
+    0x1E, 0x40, 0xBF, 0x00, 0xFF, 0xFF, 0x00,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0x7C,
+    0xDB, 0xFF, 0xF3, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0x3D, 0x82, 0x86, 0x79, 0x80, 0x7F,
+    0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0xA6, 0xBF, 0xEC,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x88, 0x27,
+    0xD6, 0xA0, 0x00, 0xFF, 0x00, 0xFF, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
+    0xFE, 0xDF, 0x7F, 0xCE, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0x18, 0x47, 0x10, 0xC7, 0x00,
+    0xFF, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x10, 0xFF,
+    0x18, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F,
+    0x80, 0x7F, 0x80, 0x7F, 0x80, 0x7F, 0x80,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x7F, 0xFF, 0x7F, 0xFF, 0x7F,
+    0xFF, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x01, 0xFF,
+    0x02, 0xFF, 0x0C, 0xFF, 0x10, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE,
+    0xFF, 0xFD, 0xFF, 0xF3, 0xFF, 0xEF, 0xFF,
+    0xFE, 0x11, 0xFD, 0x22, 0xFB, 0x44, 0xF7,
+    0x88, 0xEF, 0x10, 0xDF, 0x20, 0xBF, 0x40,
+    0x7F, 0x80, 0xEF, 0xFE, 0xDF, 0xFC, 0xBF,
+    0xF8, 0x7F, 0xF0, 0xFF, 0xE0, 0xFF, 0xC0,
+    0xFF, 0x80, 0xFF, 0x00, 0xBF, 0x48, 0xDF,
+    0x24, 0xDF, 0x22, 0xEF, 0x11, 0xF7, 0x08,
+    0xF9, 0x06, 0xFE, 0x01, 0xFF, 0x00, 0xF7,
+    0x3F, 0xFB, 0x1F, 0xFD, 0x1F, 0xFE, 0x0F,
+    0xFF, 0x07, 0xFF, 0x01, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x80, 0xFF, 0x7F, 0xFF, 0x00, 0x7F,
+    0x80, 0x80, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0x7F, 0xFF, 0x80, 0xFF, 0xFF,
+    0xFF, 0xFF, 0x7F, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
+    0xFF, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x03, 0xFF, 0xFC, 0xFF, 0x00,
+    0xFC, 0x03, 0x03, 0xFC, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFC, 0xFF, 0x03, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFC, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x03, 0xFF, 0x1C, 0xFF, 0xE0,
+    0xFC, 0x03, 0xE3, 0x1C, 0x1F, 0xE0, 0xFF,
+    0x00, 0xFF, 0xFF, 0xFC, 0xFF, 0xE3, 0xFF,
+    0x1F, 0xFF, 0xFF, 0xFC, 0xFF, 0xE0, 0xFF,
+    0x00, 0xFF, 0x00, 0xFC, 0xE3, 0xF3, 0x0C,
+    0xEF, 0x10, 0x1F, 0xE0, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0x00, 0x1F, 0xFC,
+    0xFF, 0xF0, 0xFF, 0xE0, 0xFF, 0x00, 0xFF,
+    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
+};
diff --git a/Core/memory.c b/Core/memory.c
index 1720356..297656c 100644
--- a/Core/memory.c
+++ b/Core/memory.c
@@ -206,7 +206,11 @@ void GB_trigger_oam_bug_read(GB_gameboy_t *gb, uint16_t address)
             }
             else if ((gb->accessed_oam_row & 0x18) == 0x00) {
                 /* Everything in this specific case is *extremely* revision and instance specific. */
-                if (gb->accessed_oam_row == 0x40) {
+                if (gb->model == GB_MODEL_MGB) {
+                    /* TODO: This is rather simplified, research further */
+                    oam_bug_tertiary_read_corruption(gb, bitwise_glitch_tertiary_read_3);
+                }
+                else if (gb->accessed_oam_row == 0x40) {
                      oam_bug_quaternary_read_corruption(gb,
                                                         ((gb->model & ~GB_MODEL_NO_SFC_BIT) == GB_MODEL_SGB2)?
                                                         bitwise_glitch_quaternary_read_sgb2:
@@ -240,6 +244,9 @@ void GB_trigger_oam_bug_read(GB_gameboy_t *gb, uint16_t address)
             if (gb->accessed_oam_row == 0x80) {
                 memcpy(gb->oam, gb->oam + gb->accessed_oam_row, 8);
             }
+            else if (gb->model == GB_MODEL_MGB && gb->accessed_oam_row == 0x40) {
+                memcpy(gb->oam, gb->oam + gb->accessed_oam_row, 8);
+            }
         }
     }
 }
@@ -507,6 +514,7 @@ static uint8_t read_high_memory(GB_gameboy_t *gb, uint16_t addr)
                 return gb->extra_oam[addr - 0xfea0];
                 
             case GB_MODEL_DMG_B:
+            case GB_MODEL_MGB:
             case GB_MODEL_SGB_NTSC:
             case GB_MODEL_SGB_PAL:
             case GB_MODEL_SGB_NTSC_NO_SFC:
@@ -1015,6 +1023,7 @@ static void write_high_memory(GB_gameboy_t *gb, uint16_t addr, uint8_t value)
                     gb->extra_oam[addr - 0xfea0] = value;
                     break;
                 case GB_MODEL_DMG_B:
+                case GB_MODEL_MGB:
                 case GB_MODEL_SGB_NTSC:
                 case GB_MODEL_SGB_PAL:
                 case GB_MODEL_SGB_NTSC_NO_SFC:
diff --git a/Core/save_state.c b/Core/save_state.c
index 6e7ca9d..cdbde2b 100644
--- a/Core/save_state.c
+++ b/Core/save_state.c
@@ -580,6 +580,7 @@ static int save_state_internal(GB_gameboy_t *gb, virtual_file_t *file, bool appe
     switch (gb->model) {
 
         case GB_MODEL_DMG_B: bess_core.full_model = BE32('GDB '); break;
+        case GB_MODEL_MGB: bess_core.full_model = BE32('GM  '); break;
             
         case GB_MODEL_SGB_NTSC:
         case GB_MODEL_SGB_NTSC_NO_SFC:
diff --git a/Core/sm83_cpu.c b/Core/sm83_cpu.c
index a918081..92adf46 100644
--- a/Core/sm83_cpu.c
+++ b/Core/sm83_cpu.c
@@ -207,7 +207,7 @@ static void cycle_write(GB_gameboy_t *gb, uint16_t addr, uint8_t value)
             uint8_t old_value = GB_read_memory(gb, addr);
             GB_advance_cycles(gb, gb->pending_cycles - 2);
             
-            if (/* gb->model != GB_MODEL_MGB && */ gb->position_in_line == 0 && (old_value & 2) && !(value & 2)) {
+            if (gb->model != GB_MODEL_MGB && gb->position_in_line == 0 && (old_value & 2) && !(value & 2)) {
                 old_value &= ~2;
             }
             
diff --git a/Makefile b/Makefile
index 7bfe580..fadc025 100644
--- a/Makefile
+++ b/Makefile
@@ -199,9 +199,9 @@ endif
 
 cocoa: $(BIN)/SameBoy.app
 quicklook: $(BIN)/SameBoy.qlgenerator
-sdl: $(SDL_TARGET) $(BIN)/SDL/dmg_boot.bin $(BIN)/SDL/cgb_boot.bin $(BIN)/SDL/agb_boot.bin $(BIN)/SDL/sgb_boot.bin $(BIN)/SDL/sgb2_boot.bin $(BIN)/SDL/LICENSE $(BIN)/SDL/registers.sym $(BIN)/SDL/background.bmp $(BIN)/SDL/Shaders
-bootroms: $(BIN)/BootROMs/agb_boot.bin $(BIN)/BootROMs/cgb_boot.bin $(BIN)/BootROMs/dmg_boot.bin $(BIN)/BootROMs/sgb_boot.bin $(BIN)/BootROMs/sgb2_boot.bin
-tester: $(TESTER_TARGET) $(BIN)/tester/dmg_boot.bin $(BIN)/tester/cgb_boot.bin $(BIN)/tester/agb_boot.bin $(BIN)/tester/sgb_boot.bin $(BIN)/tester/sgb2_boot.bin
+sdl: $(SDL_TARGET) $(BIN)/SDL/dmg_boot.bin $(BIN)/SDL/mgb_boot.bin  $(BIN)/SDL/cgb_boot.bin $(BIN)/SDL/agb_boot.bin $(BIN)/SDL/sgb_boot.bin $(BIN)/SDL/sgb2_boot.bin $(BIN)/SDL/LICENSE $(BIN)/SDL/registers.sym $(BIN)/SDL/background.bmp $(BIN)/SDL/Shaders
+bootroms: $(BIN)/BootROMs/agb_boot.bin $(BIN)/BootROMs/mgb_boot.bin $(BIN)/BootROMs/cgb_boot.bin $(BIN)/BootROMs/dmg_boot.bin $(BIN)/BootROMs/sgb_boot.bin $(BIN)/BootROMs/sgb2_boot.bin
+tester: $(TESTER_TARGET) $(BIN)/tester/dmg_boot.bin $(BIN)/tester/mgb_boot.bin $(BIN)/tester/cgb_boot.bin $(BIN)/tester/agb_boot.bin $(BIN)/tester/sgb_boot.bin $(BIN)/tester/sgb2_boot.bin
 all: cocoa sdl tester libretro
 
 # Get a list of our source files and their respective object file targets
@@ -279,6 +279,7 @@ $(BIN)/SameBoy.app: $(BIN)/SameBoy.app/Contents/MacOS/SameBoy \
                     Cocoa/Info.plist \
                     Misc/registers.sym \
                     $(BIN)/SameBoy.app/Contents/Resources/dmg_boot.bin \
+                    $(BIN)/SameBoy.app/Contents/Resources/mgb_boot.bin \
                     $(BIN)/SameBoy.app/Contents/Resources/cgb_boot.bin \
                     $(BIN)/SameBoy.app/Contents/Resources/agb_boot.bin \
                     $(BIN)/SameBoy.app/Contents/Resources/sgb_boot.bin \
@@ -417,6 +418,7 @@ $(OBJ)/BootROMs/SameBoyLogo.pb12: $(OBJ)/BootROMs/SameBoyLogo.2bpp $(PB12_COMPRE
 $(PB12_COMPRESS): BootROMs/pb12.c
 	$(NATIVE_CC) -std=c99 -Wall -Werror $< -o $@
 
+$(BIN)/BootROMs/mgb_boot.bin: BootROMs/mgb_boot.asm
 $(BIN)/BootROMs/agb_boot.bin: BootROMs/cgb_boot.asm
 $(BIN)/BootROMs/cgb_boot_fast.bin: BootROMs/cgb_boot.asm
 $(BIN)/BootROMs/sgb2_boot: BootROMs/sgb_boot.asm
diff --git a/SDL/gui.c b/SDL/gui.c
index 6bccd87..d6afe60 100644
--- a/SDL/gui.c
+++ b/SDL/gui.c
@@ -388,7 +388,7 @@ static void cycle_model_backwards(unsigned index)
 
 const char *current_model_string(unsigned index)
 {
-    return (const char *[]){"Game Boy", "Game Boy Color", "Game Boy Advance", "Super Game Boy"}
+    return (const char *[]){"Game Boy", "Game Boy Color", "Game Boy Advance", "Super Game Boy", "Game Boy Pocket"}
         [configuration.model];
 }
 
diff --git a/SDL/gui.h b/SDL/gui.h
index 1764c8b..1fe8a54 100644
--- a/SDL/gui.h
+++ b/SDL/gui.h
@@ -88,6 +88,7 @@ typedef struct {
         MODEL_CGB,
         MODEL_AGB,
         MODEL_SGB,
+        MODEL_MGB,
         MODEL_MAX,
     } model;
     
diff --git a/SDL/main.c b/SDL/main.c
index c0fd186..2e9911e 100644
--- a/SDL/main.c
+++ b/SDL/main.c
@@ -623,6 +623,7 @@ restart:
         [MODEL_DMG] = GB_MODEL_DMG_B,
         [MODEL_CGB] = GB_MODEL_CGB_E,
         [MODEL_AGB] = GB_MODEL_AGB,
+        [MODEL_MGB] = GB_MODEL_MGB,
         [MODEL_SGB] = (GB_model_t [])
         {
             [SGB_NTSC] = GB_MODEL_SGB_NTSC,