diff --git a/.gitignore b/.gitignore
index 82cc879..419b327 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,8 +1,9 @@
-/bin/
 /obj/
 /dep/
 /res/
 /tools/**
 /src/res/sources/*.z80
 /src/res/sources/*.inc
-DMGTRIS.sav
+/bin/*.map
+/bin/*.sym
+/bin/*.sav
diff --git a/.vscode/launch.json b/.vscode/launch.json
index 38a3f7a..f009285 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -9,7 +9,6 @@
             "request": "launch",
             "name": "Launch in Emulicious",
             "program": "${workspaceFolder}\\bin\\DMGTRIS.gbc",
-            "emuliciousPath": "K:\\TGM\\dmgtris\\tools",
             "port": 58870,
             "stopOnEntry": false,
             "preLaunchTask": "buildrom"
diff --git a/DMGTRIS.GBC b/DMGTRIS.GBC
deleted file mode 100644
index acee397..0000000
Binary files a/DMGTRIS.GBC and /dev/null differ
diff --git a/Makefile b/Makefile
index 5f17674..22155ef 100644
--- a/Makefile
+++ b/Makefile
@@ -43,7 +43,7 @@ INCDIRS  = src/ src/include/
 WARNINGS = all extra
 ASFLAGS  = -p 0xFF $(addprefix -i,$(INCDIRS)) $(addprefix -W,$(WARNINGS))
 LDFLAGS  = -p 0xFF
-FIXFLAGS = -p 0xFF -l 0x33 -r 0x02 -v -i $(GAMEID) -k $(LICENSEE) -t $(TITLE) -n $(VERSION) -m $(MAPPER)
+FIXFLAGS = -p 0xFF -l 0x33 -r 0x04 -v -i $(GAMEID) -k $(LICENSEE) -t $(TITLE) -n $(VERSION) -m $(MAPPER)
 
 # The list of "root" ASM files that RGBASM will be invoked on
 SRCS = $(wildcard src/*.asm)
@@ -52,11 +52,7 @@ SRCS = $(wildcard src/*.asm)
 # Use this to override the above
 include project.mk
 
-################################################
-#                                              #
-#                    TARGETS                   #
-#                                              #
-################################################
+
 
 # `all` (Default target): build the ROM
 all: $(ROM)
@@ -77,52 +73,12 @@ rebuild:
 	$(MAKE) all
 .PHONY: rebuild
 
-################################################
-#                                              #
-#                RESOURCE FILES                #
-#                                              #
-################################################
 
-# By default, asset recipes convert files in `res/` into other files in `res/`
-# This line causes assets not found in `res/` to be also looked for in `src/res/`
-# "Source" assets can thus be safely stored there without `make clean` removing them
-VPATH := src
-
-res/%.1bpp: res/%.png
-	@$(MKDIR_P) $(@D)
-	$(RGBGFX) -d 1 -o $@ $<
-
-# Define how to compress files using the PackBits16 codec
-# Compressor script requires Python 3
-res/%.pb16: res/% src/tools/pb16.py
-	@$(MKDIR_P) $(@D)
-	$(PY) src/tools/pb16.py $< res/$*.pb16
-
-res/%.pb16.size: res/%
-	@$(MKDIR_P) $(@D)
-	$(call filesize,$<,16) > res/$*.pb16.size
-
-# Define how to compress files using the PackBits8 codec
-# Compressor script requires Python 3
-res/%.pb8: res/% src/tools/pb8.py
-	@$(MKDIR_P) $(@D)
-	$(PY) src/tools/pb8.py $< res/$*.pb8
-
-res/%.pb8.size: res/%
-	@$(MKDIR_P) $(@D)
-	$(call filesize,$<,8) > res/$*.pb8.size
-
-###############################################
-#                                             #
-#                 COMPILATION                 #
-#                                             #
-###############################################
 
 # How to build a ROM
 $(BINDIR)/%.$(ROMEXT) $(BINDIR)/%.sym $(BINDIR)/%.map: $(patsubst src/%.asm,$(OBJDIR)/%.o,$(SRCS))
 	@$(MKDIR_P) $(@D)
-	$(RGBASM) $(ASFLAGS) -o $(OBJDIR)/build_date.o src/res/build_date.asm
-	$(RGBLINK) $(LDFLAGS) -m $(BINDIR)/$*.map -n $(BINDIR)/$*.sym -o $(BINDIR)/$*.$(ROMEXT) $^ $(OBJDIR)/build_date.o \
+	$(RGBLINK) $(LDFLAGS) -m $(BINDIR)/$*.map -n $(BINDIR)/$*.sym -o $(BINDIR)/$*.$(ROMEXT) $^ \
 	&& $(RGBFIX) -v $(FIXFLAGS) $(BINDIR)/$*.$(ROMEXT)
 
 # `.mk` files are auto-generated dependency lists of the "root" ASM files, to save a lot of hassle.
diff --git a/README.md b/README.md
index 5cbd270..3a480ab 100644
--- a/README.md
+++ b/README.md
@@ -70,7 +70,7 @@ ScoreIncrement points are then awarded.
 
 
 ## Playing
-You can build the game yourself, or use the binary [here](https://git.villadelfia.org/villadelfia/dmgtris/raw/branch/master/DMGTRIS.GBC) or [here](https://github.com/Villadelfia/DMGTRIS/raw/master/DMGTRIS.GBC).
+You can build the game yourself, or use the binary [here](https://git.villadelfia.org/villadelfia/dmgtris/raw/branch/master/bin/DMGTRIS.GBC) or [here](https://github.com/Villadelfia/DMGTRIS/raw/master/bin/DMGTRIS.GBC).
 
 The game should run in any accurate emulator. For Windows or Linux using Wine [bgb](https://bgb.bircd.org/) is generally regarded as the best option. For macOS [SameBoy](https://sameboy.github.io/) comes recommended.
 
diff --git a/bin/DMGTRIS.GBC b/bin/DMGTRIS.GBC
new file mode 100644
index 0000000..309339f
Binary files /dev/null and b/bin/DMGTRIS.GBC differ
diff --git a/project.mk b/project.mk
index a106ecc..ddf59e6 100644
--- a/project.mk
+++ b/project.mk
@@ -15,16 +15,12 @@ ROMNAME := DMGTRIS
 ROMEXT  := GBC
 
 # Mapper
-MAPPER := 0x03
+MAPPER := 0x1B
 
 # Extra assembler flags
 # Do not insert nop after halt
 ASFLAGS += -h
 
-# Extra linker flags
-# Tiny Rom
-LDFLAGS += -t
-
 # Extra fix flags
 # Set as gbc compatible
 FIXFLAGS += -c
diff --git a/src/bankid.asm b/src/bankid.asm
new file mode 100644
index 0000000..71ba494
--- /dev/null
+++ b/src/bankid.asm
@@ -0,0 +1,32 @@
+; DMGTRIS
+; Copyright (C) 2023 - Randy Thiemann <randy.thiemann@gmail.com>
+
+; This program is free software: you can redistribute it and/or modify
+; it under the terms of the GNU General Public License as published by
+; the Free Software Foundation, either version 3 of the License, or
+; (at your option) any later version.
+
+; This program is distributed in the hope that it will be useful,
+; but WITHOUT ANY WARRANTY; without even the implied warranty of
+; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+; GNU General Public License for more details.
+
+; You should have received a copy of the GNU General Public License
+; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+
+IF !DEF(BANKID_ASM)
+DEF BANKID_ASM EQU 1
+
+
+SECTION "Bank ID 0", ROM0[$0]
+    db $00
+
+SECTION "Bank ID 1", ROMX[$4000], BANK[1]
+    db $01
+
+SECTION "Bank ID 2", ROMX[$4000], BANK[2]
+    db $02
+
+
+ENDC
diff --git a/src/constants.asm b/src/constants.asm
index 44116b0..e219018 100644
--- a/src/constants.asm
+++ b/src/constants.asm
@@ -65,7 +65,7 @@ CHARMAP "|", 126
 CHARMAP "#", 125
 
 
-SECTION "Static Data", ROM0
+SECTION "Static Data", ROMX, BANK[1]
 sLeady::     db "  READY?  "
 sGo::        db "    GO    "
 sPause::
diff --git a/src/include/globals.asm b/src/include/globals.asm
index 39eb04b..c4f0e80 100644
--- a/src/include/globals.asm
+++ b/src/include/globals.asm
@@ -93,6 +93,10 @@ MACRO lb
     ld \1, (LOW(\2) << 8) | LOW(\3)
 ENDM
 
+DEF SAVE_MAGIC_0        EQU "D"
+DEF SAVE_MAGIC_1        EQU "M"
+DEF SAVE_MAGIC_2        EQU "G"
+DEF SAVE_MAGIC_3        EQU "3"
 
 DEF PALETTE_REGULAR     EQU %11100100
 DEF PALETTE_INVERTED    EQU %00011011
@@ -211,5 +215,7 @@ DEF FIELD_TOP_LEFT      EQU $9800+1
 DEF EASTER_0            EQU $9845
 DEF EASTER_1            EQU $9865
 
+DEF rBANKID             EQU $4000
+
 
 ENDC
diff --git a/src/main.asm b/src/main.asm
index f83d15f..acf9f8c 100644
--- a/src/main.asm
+++ b/src/main.asm
@@ -45,17 +45,6 @@ wInitialH:: ds 1
 wInitialL:: ds 1
 
 
-SECTION "Persistent Globals", SRAM
-rMagic:: ds 4
-rSwapABState:: ds 1
-rRNGModeState:: ds 1
-rRotModeState:: ds 1
-rDropModeState:: ds 1
-rSpeedCurveState:: ds 1
-rAlways20GState:: ds 1
-rSelectedStartLevel:: ds 2
-
-
 SECTION "Stack", WRAM0
 wStack::
     ds STACK_SIZE + 1
@@ -95,6 +84,13 @@ Main::
     ldh [rKEY1], a
     stop
 .notgbc
+    ; Initialize the mapper.
+    ld a, CART_SRAM_ENABLE
+    ld [rRAMG], a
+    xor a, a
+    ld [rRAMB], a
+    ld a, BANK("Static Data")
+    ld [rROMB0], a
 
     ; We use a single set of tiles for the entire game, so we copy it at the start.
     ld de, Tiles
@@ -107,91 +103,8 @@ Main::
     call SetNumberSpritePositions
     call CopyOAMHandler
 
-    ; Enable RAM. (Not actually needed since we don't ACTUALLY use an MBC, but without this emulators shit the bed.)
-    ld hl, rRAMG
-    ld a, CART_SRAM_ENABLE
-    ld [hl], a
-
-    ; Check for save data.
-    ld a, [rMagic]
-    cp a, "D"
-    jr nz, .nosavedata
-    ld a, [rMagic+1]
-    cp a, "M"
-    jr nz, .nosavedata
-    ld a, [rMagic+2]
-    cp a, "G"
-    jr nz, .nosavedata
-    ld a, [rMagic+3]
-    cp a, "2"
-    jr nz, .nosavedata
-
-.savedata
-    ld a, [rSwapABState]
-    ld [wSwapABState], a
-    ld a, [rRNGModeState]
-    ld [wRNGModeState], a
-    ld a, [rRotModeState]
-    ld [wRotModeState], a
-    ld a, [rDropModeState]
-    ld [wDropModeState], a
-    ld a, [rSpeedCurveState]
-    ld [wSpeedCurveState], a
-    ld a, [rAlways20GState]
-    ld [wAlways20GState], a
-    ld a, [rSelectedStartLevel]
-    ldh [hStartSpeed], a
-    ld a, [rSelectedStartLevel+1]
-    ldh [hStartSpeed+1], a
-    jr .otherinit
-
-.nosavedata
-    ld a, "D"
-    ld [rMagic], a
-    ld a, "M"
-    ld [rMagic+1], a
-    ld a, "G"
-    ld [rMagic+2], a
-    ld a, "2"
-    ld [rMagic+3], a
-
-    ld a, BUTTON_MODE_NORM
-    ld [rSwapABState], a
-    ld [wSwapABState], a
-
-    ld a, RNG_MODE_TGM3
-    ld [rRNGModeState], a
-    ld [wRNGModeState], a
-
-    ld a, RNG_MODE_TGM3
-    ld [rRNGModeState], a
-    ld [wRNGModeState], a
-
-    ld a, ROT_MODE_ARSTI
-    ld [rRotModeState], a
-    ld [wRotModeState], a
-
-    ld a, DROP_MODE_SONIC
-    ld [rDropModeState], a
-    ld [wDropModeState], a
-
-    ld a, SCURVE_DMGT
-    ld [rSpeedCurveState], a
-    ld [wSpeedCurveState], a
-
-    ld a, HIG_MODE_OFF
-    ld [rAlways20GState], a
-    ld [wAlways20GState], a
-
-    ld hl, sSpeedCurve
-    ld a, l
-    ldh [hStartSpeed], a
-    ld [rSelectedStartLevel], a
-    ld a, h
-    ldh [hStartSpeed+1], a
-    ld [rSelectedStartLevel+1], a
-
-.otherinit
+    ; Other initialization.
+    call RestoreSRAM
     call TimeInit
     call IntrInit
     call InputInit
diff --git a/src/res/gameplay_map.inc b/src/res/gameplay_map.inc
index a299213..885f03a 100644
--- a/src/res/gameplay_map.inc
+++ b/src/res/gameplay_map.inc
@@ -19,7 +19,7 @@ IF !DEF(GAMEPLAY_MAP_INC)
 DEF GAMEPLAY_MAP_INC EQU 1
 
 
-SECTION "Gameplay Tilemap", ROM0
+SECTION "Gameplay Tilemap", ROMX, BANK[1]
 GameplayTilemap::
     DB $02,$01,$01,$01,$01,$01,$01,$01,$01,$01
     DB $01,$03,$09,$01,$01,$01,$01,$01,$01,$09
diff --git a/src/res/tiles.inc b/src/res/tiles.inc
index 3c58ceb..cacb0f7 100644
--- a/src/res/tiles.inc
+++ b/src/res/tiles.inc
@@ -18,7 +18,7 @@
 IF !DEF(TILES_INC)
 DEF TILES_INC EQU 1
 
-SECTION "Tile data", ROM0
+SECTION "Tile data", ROMX, BANK[1]
 Tiles::
     DB $FF,$FF,$FF,$FF,$FF,$FF,$FF,$FF
     DB $FF,$FF,$FF,$FF,$FF,$FF,$FF,$FF
diff --git a/src/res/title_map.inc b/src/res/title_map.inc
index f190f69..c2d9a81 100644
--- a/src/res/title_map.inc
+++ b/src/res/title_map.inc
@@ -19,7 +19,7 @@ IF !DEF(TITLE_MAP_INC)
 DEF TITLE_MAP_INC EQU 1
 
 
-SECTION "Title Screen Tilemap", ROM0
+SECTION "Title Screen Tilemap", ROMX, BANK[1]
 TitleScreenTilemap::
     DB $C3,$5B,$4C,$59,$4F,$5A,$5D,$4C,$01,$59
     DB $5A,$61,$4C,$01,$FA,$FB,$FC,$FD,$FE,$FF
diff --git a/src/sfx.asm b/src/sfx.asm
index b65f009..4da20dd 100644
--- a/src/sfx.asm
+++ b/src/sfx.asm
@@ -61,7 +61,7 @@ DEF REG_WAVE_PATTERN_E EQU $3E
 DEF REG_WAVE_PATTERN_F EQU $3F
 
 
-SECTION "SFX Data", ROM0
+SECTION "SFX Data", ROMX, BANK[2]
 sSFXPieceI::
     db REG_NR12_CH1_VOLEV, $00, REG_NR14_CH1_FRQHI, $80, REG_NR22_CH2_VOLEV, $00, REG_NR24_CH2_FRQHI, $80
     db REG_NR32_CH3_VOLUM, $00, REG_NR34_CH3_FRQHI, $80, REG_NR42_CH4_VOLEV, $00, REG_NR44_CH4_CNTRL, $80
@@ -2431,6 +2431,12 @@ SFXKill::
 
     ; This play routine must be called every frame.
 SFXPlay::
+    ; Bank to SFX bank.
+    ld a, [rBANKID]
+    ld e, a
+    ld a, BANK("SFX Data")
+    ld [rROMB0], a
+
     ; Load the playhead position into HL.
     ldh a, [hPlayhead]
     ld l, a
@@ -2439,7 +2445,10 @@ SFXPlay::
 
     ; Nothing to do if it's a null ptr.
     or a, l
-    ret z
+    jr nz, .getRegister
+    ld a, e
+    ld [rROMB0], a
+    ret
 
     ; Otherwise, get the register to write to.
 .getRegister
@@ -2449,6 +2458,8 @@ SFXPlay::
     ; If it's $FE, then we're done. Check if there's more for us in the queue.
     cp a, $FE
     jr nz, :+
+    ld a, e
+    ld [rROMB0], a
     call SFXProcessQueue
     ret
 
@@ -2473,6 +2484,8 @@ SFXPlay::
     ldh [hPlayhead], a
     ld a, h
     ldh [hPlayhead+1], a
+    ld a, e
+    ld [rROMB0], a
     ret
 
 
diff --git a/src/sram.asm b/src/sram.asm
new file mode 100644
index 0000000..96f32b4
--- /dev/null
+++ b/src/sram.asm
@@ -0,0 +1,160 @@
+; DMGTRIS
+; Copyright (C) 2023 - Randy Thiemann <randy.thiemann@gmail.com>
+
+; This program is free software: you can redistribute it and/or modify
+; it under the terms of the GNU General Public License as published by
+; the Free Software Foundation, either version 3 of the License, or
+; (at your option) any later version.
+
+; This program is distributed in the hope that it will be useful,
+; but WITHOUT ANY WARRANTY; without even the implied warranty of
+; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+; GNU General Public License for more details.
+
+; You should have received a copy of the GNU General Public License
+; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+
+IF !DEF(SRAM_ASM)
+DEF SRAM_ASM EQU 1
+
+
+INCLUDE "globals.asm"
+
+
+SECTION "Persistent Globals", SRAM
+rMagic:: ds 4
+rCheck:: ds 6
+rSwapABState:: ds 1
+rRNGModeState:: ds 1
+rRotModeState:: ds 1
+rDropModeState:: ds 1
+rSpeedCurveState:: ds 1
+rAlways20GState:: ds 1
+rSelectedStartLevel:: ds 2
+
+
+SECTION "SRAM Functions", ROM0
+InitializeSRAM:
+    ; Set the magic id.
+    ld a, SAVE_MAGIC_0
+    ld [rMagic], a
+    ld a, SAVE_MAGIC_1
+    ld [rMagic+1], a
+    ld a, SAVE_MAGIC_2
+    ld [rMagic+2], a
+    ld a, SAVE_MAGIC_3
+    ld [rMagic+3], a
+
+    ; Load defaults.
+    ld a, BUTTON_MODE_NORM
+    ld [rSwapABState], a
+    ld [wSwapABState], a
+
+    ld a, RNG_MODE_TGM3
+    ld [rRNGModeState], a
+    ld [wRNGModeState], a
+
+    ld a, ROT_MODE_ARSTI
+    ld [rRotModeState], a
+    ld [wRotModeState], a
+
+    ld a, DROP_MODE_SONIC
+    ld [rDropModeState], a
+    ld [wDropModeState], a
+
+    ld a, SCURVE_DMGT
+    ld [rSpeedCurveState], a
+    ld [wSpeedCurveState], a
+
+    ld a, HIG_MODE_OFF
+    ld [rAlways20GState], a
+    ld [wAlways20GState], a
+    ; Falls through to the next label!
+
+
+PartiallyInitializeSRAM:
+    ; Save build data.
+    ld a, LOW(__UTC_YEAR__)
+    ld [rCheck], a
+    ld a, __UTC_MONTH__
+    ld [rCheck+1], a
+    ld a, __UTC_DAY__
+    ld [rCheck+2], a
+    ld a, __UTC_HOUR__
+    ld [rCheck+3], a
+    ld a, __UTC_MINUTE__
+    ld [rCheck+4], a
+    ld a, __UTC_SECOND__
+    ld [rCheck+5], a
+
+    ; Set to the default start level.
+    ld hl, sSpeedCurve
+    ld a, l
+    ldh [hStartSpeed], a
+    ld [rSelectedStartLevel], a
+    ld a, h
+    ldh [hStartSpeed+1], a
+    ld [rSelectedStartLevel+1], a
+    ret
+
+
+RestoreSRAM::
+    ; Check if our SRAM is initialized at all.
+    ; If not, we load all the defaults.
+    ld a, [rMagic]
+    cp a, SAVE_MAGIC_0
+    jr nz, InitializeSRAM
+    ld a, [rMagic+1]
+    cp a, SAVE_MAGIC_1
+    jr nz, InitializeSRAM
+    ld a, [rMagic+2]
+    cp a, SAVE_MAGIC_2
+    jp nz, InitializeSRAM
+    ld a, [rMagic+3]
+    cp a, SAVE_MAGIC_3
+    jp nz, InitializeSRAM
+
+    ; If SRAM is initialized, we still need to check if it's for this exact build.
+    ; If not, wipe data that is no longer valid.
+    ld a, [rCheck]
+    cp a, LOW(__UTC_YEAR__)
+    jr nz, PartiallyInitializeSRAM
+    ld a, [rCheck+1]
+    cp a, __UTC_MONTH__
+    jr nz, PartiallyInitializeSRAM
+    ld a, [rCheck+2]
+    cp a, __UTC_DAY__
+    jr nz, PartiallyInitializeSRAM
+    ld a, [rCheck+3]
+    cp a, __UTC_HOUR__
+    jr nz, PartiallyInitializeSRAM
+    ld a, [rCheck+4]
+    cp a, __UTC_MINUTE__
+    jr nz, PartiallyInitializeSRAM
+    ld a, [rCheck+5]
+    cp a, __UTC_SECOND__
+    jr nz, PartiallyInitializeSRAM
+
+    ; SRAM is initialized and for this build, so we can load the data.
+    ld a, [rSwapABState]
+    ld [wSwapABState], a
+    ld a, [rRNGModeState]
+    ld [wRNGModeState], a
+    ld a, [rRotModeState]
+    ld [wRotModeState], a
+    ld a, [rDropModeState]
+    ld [wDropModeState], a
+    ld a, [rSpeedCurveState]
+    ld [wSpeedCurveState], a
+    ld a, [rAlways20GState]
+    ld [wAlways20GState], a
+
+    ld a, [rSelectedStartLevel]
+    ldh [hStartSpeed], a
+    ld a, [rSelectedStartLevel+1]
+    ldh [hStartSpeed+1], a
+    ret
+
+
+ENDC