Improve scoring, add dark mode, allow intro animation to be skipped.

README.md

@@ -87,7 +87,7 @@ Lines = Lines cleared.
 
 Level = The level before the lines were cleared.
 
-Soft = Amount of frames the down button was held during this piece + 10 if the piece was sonic or hard dropped.
+Soft = Amount of frames the down button was held during this piece + double the rows the piece was sonic or hard dropped.
 
 Combo = Old combo + (2 x Lines) - 2
 

src/dmgfx.asm

@@ -1,90 +0,0 @@
-; 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(DMGFX_ASM)
-DEF DMGFX_ASM EQU 1
-
-
-INCLUDE "globals.asm"
-
-
-SECTION "DMG Intro Effect", ROM0
-    ; Does a small effect on boot with the nintendo logo.
-DoDMGEffect::
-    ld a, [wInitialA]
-    cp a, $11
-    ret z
-
-    ; Yeet the logo
-    ld c, 10
-.loop0
-    wait_vblank
-    ldh a, [rSCY]
-    dec a
-    ldh [rSCY], a
-    wait_vblank_end
-    dec c
-    jr nz, .loop0
-
-    ld c, 45
-.loop1
-    wait_vblank
-    ldh a, [rSCY]
-    inc a
-    inc a
-    ldh [rSCY], a
-    wait_vblank_end
-    dec c
-    jr nz, .loop1
-
-    ; Fade
-    wait_vblank
-    ld a, PALETTE_MONO_2
-    ldh [rBGP], a
-
-    ld c, 20
-.loop2
-    wait_vblank
-    wait_vblank_end
-    dec c
-    jr nz, .loop2
-
-    wait_vblank
-    ld a, PALETTE_MONO_1
-    ldh [rBGP], a
-
-    ld c, 20
-.loop3
-    wait_vblank
-    wait_vblank_end
-    dec c
-    jr nz, .loop3
-
-    wait_vblank
-    ld a, PALETTE_MONO_0
-    ldh [rBGP], a
-
-    ld c, 20
-.loop4
-    wait_vblank
-    wait_vblank_end
-    dec c
-    jr nz, .loop4
-    ret
-
-
-ENDC

src/field.asm

@@ -1559,6 +1559,11 @@ FieldProcess::
     ldh a, [hCurrentPieceY]
     add a, b
     ldh [hCurrentPieceY], a
+    ldh a, [hAwardDownBonus]
+    cp a, $FF
+    jr nz, .postgrav
+    ld a, b
+    ldh [hAwardDownBonus], a
     jr .postgrav
 
     ; No. Smaller distance.
@@ -1568,6 +1573,11 @@ FieldProcess::
     ldh a, [hCurrentPieceY]
     add a, b
     ldh [hCurrentPieceY], a
+    ldh a, [hAwardDownBonus]
+    cp a, $FF
+    jr nz, .postgrav
+    ld a, b
+    ldh [hAwardDownBonus], a
 
 
     ; **************************************************************
@@ -2067,16 +2077,12 @@ FieldDelay::
     ; Add soft drop points.
     ldh a, [hDownFrames]
     ld c, a
-    xor a, a
-    ld b, a
-
-    ; Lock bonus?
     ldh a, [hAwardDownBonus]
-    cp a, $FF
-    jr nz, .premultiplier
-    ld a, 10
+    add a, a
     add a, c
     ld c, a
+    xor a, a
+    ld b, a
 
     ; Final total pre-multipliers.
 .premultiplier
@@ -3807,6 +3813,11 @@ BigFieldProcess::
     ldh a, [hCurrentPieceY]
     add a, b
     ldh [hCurrentPieceY], a
+    ldh a, [hAwardDownBonus]
+    cp a, $FF
+    jr nz, .postgrav
+    ld a, b
+    ldh [hAwardDownBonus], a
     jr .postgrav
 
     ; No. Smaller distance.
@@ -3816,6 +3827,11 @@ BigFieldProcess::
     ldh a, [hCurrentPieceY]
     add a, b
     ldh [hCurrentPieceY], a
+    ldh a, [hAwardDownBonus]
+    cp a, $FF
+    jr nz, .postgrav
+    ld a, b
+    ldh [hAwardDownBonus], a
 
 
     ; **************************************************************
@@ -4317,16 +4333,12 @@ BigFieldDelay::
     ; Add soft drop points.
     ldh a, [hDownFrames]
     ld c, a
-    xor a, a
-    ld b, a
-
-    ; Lock bonus?
     ldh a, [hAwardDownBonus]
-    cp a, $FF
-    jr nz, .premultiplier
-    ld a, 10
+    add a, a
     add a, c
     ld c, a
+    xor a, a
+    ld b, a
 
     ; Final total pre-multipliers.
 .premultiplier

src/gbc.asm

@@ -73,6 +73,8 @@ INCLUDE "globals.asm"
     DEF_RGB555_FROM24 BLACK_F, $20, $20, $20
     DEF_RGB555_FROM24 GOLD_0,  $36, $2C, $05
     DEF_RGB555_FROM24 GOLD_1,  $99, $73, $16
+    DEF_RGB555_FROM24 WHITE_F, $FF, $FF, $FF
+
 
     ; Title Palettes.
     DEF_RGB555_FROM24 TITLE_PAL0_0, 0, 0, 0
@@ -101,7 +103,6 @@ INCLUDE "globals.asm"
     DEF_RGB555_FROM24 TITLE_PAL4_3, 155, 173, 183
 
 
-
 SECTION "GBC Shadow Tilemap", WRAM0, ALIGN[8]
 wShadowTilemap:: ds 32*32
 
@@ -214,7 +215,19 @@ GBCGameplayInit::
     WRITEPAL_A 5, YELLOW_3_C, YELLOW_2_C, YELLOW_1_C, YELLOW_0_C
     WRITEPAL_A 6, CYAN_3_C,   CYAN_2_C,   CYAN_1_C,   CYAN_0_C
     WRITEPAL_A 7, WHITE_C,    GRAY_1_C,   GRAY_0_C,   BLACK_C
+    ld a, [wBGMode]
+    cp a, BG_MODE_DARK
+    jp nz, .postpalettes
+    WRITEPAL_B 0, BLACK_C,    RED_2_C,    RED_1_C,    RED_0_C
+    WRITEPAL_B 1, BLACK_C,  GREEN_2_C,  GREEN_1_C,  GREEN_0_C
+    WRITEPAL_B 2, BLACK_C, PURPLE_2_C, PURPLE_1_C, PURPLE_0_C
+    WRITEPAL_B 3, BLACK_C,   BLUE_2_C,   BLUE_1_C,   BLUE_0_C
+    WRITEPAL_B 4, BLACK_C, ORANGE_2_C, ORANGE_1_C, ORANGE_0_C
+    WRITEPAL_B 5, BLACK_C, YELLOW_2_C, YELLOW_1_C, YELLOW_0_C
+    WRITEPAL_B 6, BLACK_C,   CYAN_2_C,   CYAN_1_C,   CYAN_0_C
+    WRITEPAL_A 7, BLACK_C,    GRAY_0_C,   GRAY_1_C,   WHITE_C
     jp .postpalettes
+
 .agb
     WRITEPAL_A 0, RED_3_A,    RED_2_A,    RED_1_A,    RED_0_A
     WRITEPAL_A 1, GREEN_3_A,  GREEN_2_A,  GREEN_1_A,  GREEN_0_A
@@ -224,8 +237,36 @@ GBCGameplayInit::
     WRITEPAL_A 5, YELLOW_3_A, YELLOW_2_A, YELLOW_1_A, YELLOW_0_A
     WRITEPAL_A 6, CYAN_3_A,   CYAN_2_A,   CYAN_1_A,   CYAN_0_A
     WRITEPAL_A 7, WHITE_A,    GRAY_1_A,   GRAY_0_A,   BLACK_A
+    ld a, [wBGMode]
+    cp a, BG_MODE_DARK
+    jp nz, .postpalettes
+    WRITEPAL_B 0, BLACK_A,    RED_2_A,    RED_1_A,    RED_0_A
+    WRITEPAL_B 1, BLACK_A,  GREEN_2_A,  GREEN_1_A,  GREEN_0_A
+    WRITEPAL_B 2, BLACK_A, PURPLE_2_A, PURPLE_1_A, PURPLE_0_A
+    WRITEPAL_B 3, BLACK_A,   BLUE_2_A,   BLUE_1_A,   BLUE_0_A
+    WRITEPAL_B 4, BLACK_A, ORANGE_2_A, ORANGE_1_A, ORANGE_0_A
+    WRITEPAL_B 5, BLACK_A, YELLOW_2_A, YELLOW_1_A, YELLOW_0_A
+    WRITEPAL_B 6, BLACK_A,   CYAN_2_A,   CYAN_1_A,   CYAN_0_A
+    WRITEPAL_A 7, BLACK_A,   GRAY_1_A,   GRAY_0_A,    WHITE_A
 .postpalettes
 
+
+
+    ldh a, [hBState]
+    and a, a
+    jp z, .skip
+    WRITEPAL_B 0, BLACK_C,    RED_2_C,    RED_1_C,    RED_0_C
+    WRITEPAL_B 1, BLACK_C,  GREEN_2_C,  GREEN_1_C,  GREEN_0_C
+    WRITEPAL_B 2, BLACK_C, PURPLE_2_C, PURPLE_1_C, PURPLE_0_C
+    WRITEPAL_B 3, BLACK_C,   BLUE_2_C,   BLUE_1_C,   BLUE_0_C
+    WRITEPAL_B 4, BLACK_C, ORANGE_2_C, ORANGE_1_C, ORANGE_0_C
+    WRITEPAL_B 5, BLACK_C, YELLOW_2_C, YELLOW_1_C, YELLOW_0_C
+    WRITEPAL_B 6, BLACK_C,   CYAN_2_C,   CYAN_1_C,   CYAN_0_C
+    WRITEPAL_B 7, BLACK_C,    GRAY_0_C,   GRAY_1_C,   WHITE_C
+.skip
+
+
+
     ; Copy the tilemap to shadow.
     ld de, $9800
     ld hl, wShadowTilemap
@@ -528,6 +569,9 @@ GBCGameplayProcess::
     ret
 
 .black
+    ld a, [wBGMode]
+    cp a, BG_MODE_DARK
+    jr z, .white
     ld a, OCPSF_AUTOINC | (7*8)+(3*2)
     ldh [rOCPS], a
     ld bc, BLACK_F_C
@@ -538,6 +582,17 @@ GBCGameplayProcess::
     ldh [rOCPD], a
     ret
 
+.white
+    ld a, OCPSF_AUTOINC | (7*8)+(3*2)
+    ldh [rOCPS], a
+    ld bc, WHITE_F_C
+    wait_vram
+    ld a, c
+    ldh [rOCPD], a
+    ld a, b
+    ldh [rOCPD], a
+    ret
+
 
 GBCBigGameplayProcess::
     ld a, [wInitialA]

src/include/globals.asm

@@ -166,6 +166,7 @@ DEF BANK_MUSIC_3        EQU 9
 ; Some useful palettes.
 DEF PALETTE_REGULAR     EQU %11100100
 DEF PALETTE_INVERTED    EQU %00011011
+DEF PALETTE_INVERTED_L  EQU %01101111
 DEF PALETTE_MONO_0      EQU %11111111
 DEF PALETTE_MONO_1      EQU %10101010
 DEF PALETTE_MONO_2      EQU %01010101
@@ -346,6 +347,10 @@ DEF FILTER_MODE_UDLR    EQU 3
 DEF FILTER_MODE_NONE    EQU 4
 DEF FILTER_MODE_COUNT   EQU 5
 
+DEF BG_MODE_LITE        EQU 0
+DEF BG_MODE_DARK        EQU 1
+DEF BG_MODE_COUNT       EQU 2
+
 ; VRAM Offsets for gameplay tiles
 DEF FIELD_RNG           EQU $9852
 DEF FIELD_ROT           EQU $9892
@@ -490,18 +495,19 @@ DEF TITLE_SETTINGS_TETRY       EQU $99C0
 DEF TITLE_SETTINGS_SEL_BACK    EQU 6
 
 DEF TITLE_PROFILE_OPTION_BASE EQU $9840
-DEF TITLE_PROFILE_OPTIONS     EQU 8
+DEF TITLE_PROFILE_OPTIONS     EQU 9
 DEF TITLE_PROFILE_INDEX       EQU $984F
 DEF TITLE_PROFILE_NAME_0      EQU $986F
 DEF TITLE_PROFILE_NAME_1      EQU $988F
 DEF TITLE_PROFILE_NAME_2      EQU $98AF
 DEF TITLE_PROFILE_BUTTONS     EQU $98CF
 DEF TITLE_PROFILE_FILTER      EQU $98EF
-DEF TITLE_PROFILE_RESET       EQU $990F
-DEF TITLE_PROFILE_BACK        EQU $992F
+DEF TITLE_PROFILE_BG          EQU $990F
+DEF TITLE_PROFILE_RESET       EQU $992F
+DEF TITLE_PROFILE_BACK        EQU $994F
 DEF TITLE_PROFILE_TETRY       EQU $99C0
-DEF TITLE_PROFILE_SEL_RESET   EQU 6
-DEF TITLE_PROFILE_SEL_BACK    EQU 7
+DEF TITLE_PROFILE_SEL_RESET   EQU 7
+DEF TITLE_PROFILE_SEL_BACK    EQU 8
 
 DEF TITLE_RECORDS_MODE        EQU $9848
 DEF TITLE_RECORDS_SCORE_BASE  EQU $98A2

src/include/rgb555.asm

@@ -33,12 +33,12 @@ MACRO DEF_RGB555
     DEF COLOR   EQUS "\1"
 
     ; Uncorrected
-    DEF RED_A   EQU (\2 & $1F)
-    DEF GREEN_A EQU (\3 & $1F)
-    DEF BLUE_A  EQU (\4 & $1F)
+    DEF R_A   EQU (\2 & $1F)
+    DEF G_A EQU (\3 & $1F)
+    DEF B_A  EQU (\4 & $1F)
 
-    DEF {COLOR}   EQU (RED_A << 0) | (GREEN_A << 5) | (BLUE_A << 10)
-    DEF {COLOR}_A EQU (RED_A << 0) | (GREEN_A << 5) | (BLUE_A << 10)
+    DEF {COLOR}   EQU (R_A << 0) | (G_A << 5) | (B_A << 10)
+    DEF {COLOR}_A EQU (R_A << 0) | (G_A << 5) | (B_A << 10)
 
     ; Transfer function.
     DEF GAMMA     EQU 2.0q25

src/intro.asm

@@ -0,0 +1,192 @@
+; 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(INTRO_ASM)
+DEF INTRO_ASM EQU 1
+
+
+INCLUDE "globals.asm"
+
+    DEF_RGB555 FADE_0, 31, 31, 31
+    DEF_RGB555 FADE_1, 30, 30, 30
+    DEF_RGB555 FADE_2, 29, 29, 29
+    DEF_RGB555 FADE_3, 28, 28, 28
+    DEF_RGB555 FADE_4, 27, 27, 27
+    DEF_RGB555 FADE_5, 26, 26, 26
+    DEF_RGB555 FADE_6, 25, 25, 25
+    DEF_RGB555 FADE_7, 24, 24, 24
+    DEF_RGB555 FADE_8, 23, 23, 23
+    DEF_RGB555 FADE_9, 22, 22, 22
+    DEF_RGB555 FADE_10, 21, 21, 21
+    DEF_RGB555 FADE_11, 20, 20, 20
+    DEF_RGB555 FADE_12, 19, 19, 19
+    DEF_RGB555 FADE_13, 18, 18, 18
+    DEF_RGB555 FADE_14, 17, 17, 17
+    DEF_RGB555 FADE_15, 16, 16, 16
+    DEF_RGB555 FADE_16, 15, 15, 15
+    DEF_RGB555 FADE_17, 14, 14, 14
+    DEF_RGB555 FADE_18, 13, 13, 13
+    DEF_RGB555 FADE_19, 12, 12, 12
+    DEF_RGB555 FADE_20, 11, 11, 11
+    DEF_RGB555 FADE_21, 10, 10, 10
+    DEF_RGB555 FADE_22, 9, 9, 9
+    DEF_RGB555 FADE_23, 8, 8, 8
+    DEF_RGB555 FADE_24, 7, 7, 7
+    DEF_RGB555 FADE_25, 6, 6, 6
+    DEF_RGB555 FADE_26, 5, 5, 5
+    DEF_RGB555 FADE_27, 4, 4, 4
+    DEF_RGB555 FADE_28, 3, 3, 3
+    DEF_RGB555 FADE_29, 2, 2, 2
+    DEF_RGB555 FADE_30, 1, 1, 1
+    DEF_RGB555 FADE_31, 0, 0, 0
+
+
+SECTION "Intro Effect Trampoline", ROM0
+DoIntroEffect::
+    ld b, BANK_TITLE
+    rst RSTSwitchBank
+    ld a, [wInitialA]
+    cp a, $11
+    call nz, DoDMGEffect
+    call z,  DoGBCEffect
+    jp RSTRestoreBank
+
+
+SECTION "Intro Effects Banked", ROMX, BANK[BANK_TITLE]
+DoDMGEffect:
+    ; Yeet the logo
+    ld c, 10
+.loop0
+    call GetInput
+    ldh a, [hStartState]
+    ld hl, hAState
+    or a, [hl]
+    ld hl, hBState
+    or a, [hl]
+    ret nz
+    wait_vblank
+    ldh a, [rSCY]
+    dec a
+    ldh [rSCY], a
+    wait_vblank_end
+    dec c
+    jr nz, .loop0
+
+    ld c, 45
+.loop1
+    call GetInput
+    ldh a, [hStartState]
+    ld hl, hAState
+    or a, [hl]
+    ld hl, hBState
+    or a, [hl]
+    ret nz
+    wait_vblank
+    ldh a, [rSCY]
+    inc a
+    inc a
+    ldh [rSCY], a
+    wait_vblank_end
+    dec c
+    jr nz, .loop1
+
+    ; Fade
+    wait_vblank
+    ld a, PALETTE_MONO_2
+    ldh [rBGP], a
+
+    ld c, 20
+.loop2
+    call GetInput
+    ldh a, [hStartState]
+    ld hl, hAState
+    or a, [hl]
+    ld hl, hBState
+    or a, [hl]
+    ret nz
+    wait_vblank
+    wait_vblank_end
+    dec c
+    jr nz, .loop2
+
+    wait_vblank
+    ld a, PALETTE_MONO_1
+    ldh [rBGP], a
+
+    ld c, 20
+.loop3
+    call GetInput
+    ldh a, [hStartState]
+    ld hl, hAState
+    or a, [hl]
+    ld hl, hBState
+    or a, [hl]
+    ret nz
+    wait_vblank
+    wait_vblank_end
+    dec c
+    jr nz, .loop3
+
+    wait_vblank
+    ld a, PALETTE_MONO_0
+    ldh [rBGP], a
+
+    ld c, 20
+.loop4
+    call GetInput
+    ldh a, [hStartState]
+    ld hl, hAState
+    or a, [hl]
+    ld hl, hBState
+    or a, [hl]
+    ret nz
+    wait_vblank
+    wait_vblank_end
+    dec c
+    jr nz, .loop4
+    ret
+
+
+DoGBCEffect:
+    ; Fade the screen to black.
+    FOR I, 31, 0, -1
+        wait_vblank
+        WRITEPAL_B 0, (I << 10 | I << 5 | I), (I << 10 | I << 5 | I), (I << 10 | I << 5 | I), (I << 10 | I << 5 | I)
+        wait_vblank_end
+        wait_vblank
+        wait_vblank_end
+        call GetInput
+        ldh a, [hStartState]
+        ld hl, hAState
+        or a, [hl]
+        ld hl, hBState
+        or a, [hl]
+        ret nz
+    ENDR
+    wait_vblank
+    wait_vblank_end
+    wait_vblank
+    wait_vblank_end
+    wait_vblank
+    wait_vblank_end
+    wait_vblank
+    wait_vblank_end
+    wait_vblank
+    ret
+
+
+ENDC

src/main.asm

@@ -34,6 +34,7 @@ wRotModeState:: ds 1
 wDropModeState:: ds 1
 wSpeedCurveState:: ds 1
 wAlways20GState:: ds 1
+wBGMode:: ds 1
 wInitialA:: ds 1
 wInitialB:: ds 1
 wInitialC:: ds 1
@@ -78,8 +79,10 @@ Main::
     ; Harvest entropy
     call HarvestEntropy
 
-    ; Let the DMG have some fun with the initial screen.
-    call DoDMGEffect
+    ; Let the console have some fun with the initial screen.
+    call InputInit
+    call BankingInit
+    call DoIntroEffect
 
     ; Turn off LCD during initialization.
     wait_vram
@@ -93,8 +96,8 @@ Main::
 
     ; Other initialization.
     call RestoreSRAM
-    call TimeInit
     call InputInit
+    call TimeInit
     call SFXInit
     call BankingInit
 

src/res/other_data.inc

@@ -1014,8 +1014,8 @@ sTitleTiles::
     DB $00,$00,$01,$00,$00,$00,$00,$00
     DB $80,$80,$C0,$C0,$60,$60,$60,$60
     DB $F0,$F0,$F0,$F0,$E0,$E0,$C0,$C0
-    DB $00,$00,$85,$00,$85,$00,$87,$00
-    DB $81,$00,$D1,$00,$00,$00,$00,$00
+    DB $00,$00,$87,$00,$84,$00,$87,$00
+    DB $81,$00,$D7,$00,$00,$00,$00,$00
     DB $C0,$C0,$F0,$F0,$FC,$FC,$FF,$FF
     DB $FC,$FC,$F0,$F0,$C0,$C0,$00,$00
     DB $C0,$00,$F0,$00,$FC,$00,$FF,$00

src/res/title_data.inc

@@ -70,6 +70,10 @@ sFilterMode::
     db "UDLR"
     db "NONE"
 
+sBGMode::
+    db "LITE"
+    db "DARK"
+
 sTetryRNG::
     db "THIS OPTION WILL"
     db "CHANGE THE WAY  "
@@ -140,13 +144,19 @@ sTetryButtons::
     db "THIS OPTION WILL"
     db "CHANGE WHICH WAY"
     db "THE BUTTONS RO- "
-    db "TATE THE PIECE  "
+    db "TATE THE PIECE! "
 
 sTetryFILTER::
     db "THIS OPTION WILL"
     db "DETERMINE WHICH "
     db "D-PAD BUTTONS   "
-    db "HAVE PRIORITY   "
+    db "HAVE PRIORITY!  "
+
+sTetryBG::
+    db "THIS OPTION WILL"
+    db "CHANGE THE BACK-"
+    db "GROUND COLOR IN-"
+    db "GAME!           "
 
 sTetryReset::
     db "THIS OPTION WILL"
@@ -406,14 +416,14 @@ sTitleScreenProfileMap::
     DB $00,$00,$00,$00,$5D,$01,$0F,$2A,$1B,$0C
     DB $0F,$01,$11,$14,$17,$1F,$10,$1D,$28,$01
     DB $01,$01,$01,$29,$00,$00,$00,$00,$00,$00
-    DB $00,$00,$00,$00,$00,$00,$5D,$01,$1D,$10
-    DB $1E,$10,$1F,$01,$1B,$1D,$1A,$11,$14,$17
-    DB $10,$01,$01,$01,$01,$01,$00,$00,$00,$00
+    DB $00,$00,$00,$00,$00,$00,$5D,$01,$0D,$0C
+    DB $0E,$16,$12,$1D,$1A,$20,$19,$0F,$01,$01
+    DB $28,$01,$01,$01,$01,$29,$00,$00,$00,$00
     DB $00,$00,$00,$00,$00,$00,$00,$00,$5D,$01
-    DB $0D,$0C,$0E,$16,$01,$01,$01,$01,$01,$01
-    DB $01,$01,$01,$01,$01,$01,$01,$01,$00,$00
+    DB $1D,$10,$1E,$10,$1F,$01,$1B,$1D,$1A,$11
+    DB $14,$17,$10,$01,$01,$01,$01,$01,$00,$00
     DB $00,$00,$00,$00,$00,$00,$00,$00,$00,$00
-    DB $01,$01,$01,$01,$01,$01,$01,$01,$01,$01
+    DB $5D,$01,$0D,$0C,$0E,$16,$01,$01,$01,$01
     DB $01,$01,$01,$01,$01,$01,$01,$01,$01,$01
     DB $00,$00,$00,$00,$00,$00,$00,$00,$00,$00
     DB $00,$00,$01,$01,$01,$01,$01,$01,$01,$01

src/sram.asm

@@ -35,7 +35,8 @@ rSpeedCurveState\1:: ds 1
 rAlways20GState\1:: ds 1
 rSelectedStartLevel\1:: ds 2
 rFilterMode\1:: ds 1
-rUnused\1:: ds (64-12)
+rBGMode\1:: ds 1
+rUnused\1:: ds (64-13)
 ENDU
 ENDM
 
@@ -55,7 +56,8 @@ rSpeedCurveState:: ds 1
 rAlways20GState:: ds 1
 rSelectedStartLevel:: ds 2
 rFilterMode:: ds 1
-rUnused:: ds (PROFILE_SIZE - 12) ; 12 = sum of the above
+rBGMode:: ds 1
+rUnused:: ds (PROFILE_SIZE - 13) ; 13 = sum of the above
 ENDU
     PROFILE 0
     PROFILE 1
@@ -104,27 +106,78 @@ RestoreSRAM::
     jp nz, InitializeSRAM
 
     ; SRAM is initialized and for this build, so we can load the data.
+    ; We do check for corruption and make sure all the values make sense.
 TrustedLoad:
     ld a, [rSwapABState]
     ld [wSwapABState], a
-    ld a, [rRNGModeState]
+    cp a, BUTTON_MODE_COUNT
+    jr c, :+
+    xor a, a
+    ld [wSwapABState], a
+    ld [rSwapABState], a
+
+:   ld a, [rRNGModeState]
     ld [wRNGModeState], a
-    ld a, [rRotModeState]
+    cp a, RNG_MODE_COUNT
+    jr c, :+
+    xor a, a
+    ld [wRNGModeState], a
+    ld [rRNGModeState], a
+
+:   ld a, [rRotModeState]
     ld [wRotModeState], a
-    ld a, [rDropModeState]
+    cp a, ROT_MODE_COUNT
+    jr c, :+
+    xor a, a
+    ld [wRotModeState], a
+    ld [rRotModeState], a
+
+:   ld a, [rDropModeState]
     ld [wDropModeState], a
-    ld a, [rSpeedCurveState]
+    cp a, DROP_MODE_COUNT
+    jr c, :+
+    xor a, a
+    ld [wDropModeState], a
+    ld [rDropModeState], a
+
+:   ld a, [rSpeedCurveState]
     ld [wSpeedCurveState], a
-    ld a, [rAlways20GState]
+    cp a, SCURVE_COUNT
+    jr c, :+
+    xor a, a
+    ld [wSpeedCurveState], a
+    ld [rSpeedCurveState], a
+
+:   ld a, [rAlways20GState]
     ld [wAlways20GState], a
-    ld a, [rProfileName]
+    cp a, HIG_MODE_COUNT
+    jr c, :+
+    xor a, a
+    ld [wAlways20GState], a
+    ld [rAlways20GState], a
+
+:   ld a, [rFilterMode]
+    ldh [hFilterMode], a
+    cp a, FILTER_MODE_COUNT
+    jr c, :+
+    xor a, a
+    ldh [hFilterMode], a
+    ld [rFilterMode], a
+
+:   ld a, [rBGMode]
+    ld [wBGMode], a
+    cp a, BG_MODE_COUNT
+    jr c, :+
+    xor a, a
+    ld [wBGMode], a
+    ld [rBGMode], a
+
+:   ld a, [rProfileName]
     ld [wProfileName], a
     ld a, [rProfileName+1]
     ld [wProfileName+1], a
     ld a, [rProfileName+2]
     ld [wProfileName+2], a
-    ld a, [rFilterMode]
-    ldh [hFilterMode], a
 
     ; Restore the start level.
     ld b, BANK_OTHER
@@ -277,6 +330,10 @@ InitializeSRAM:
     ld [rFilterMode], a
     ldh [hFilterMode], a
 
+    ld a, BG_MODE_LITE
+    ld [rBGMode], a
+    ld [wBGMode], a
+
     ; Set to the default start level.
     ld hl, sDMGTSpeedCurve
     ld a, l

src/state_gameplay.asm

@@ -125,11 +125,22 @@ SwitchToGameplayB:
     call ApplyTells
 
     ; Set up the palettes.
+    ld a, [wBGMode]
+    cp a, BG_MODE_DARK
+    jr z, .dark
     ld a, PALETTE_REGULAR
     set_bg_palette
     set_obj0_palette
     ld a, PALETTE_LIGHTER_1
     set_obj1_palette
+    jr .done
+.dark
+    ld a, PALETTE_INVERTED
+    set_bg_palette
+    set_obj0_palette
+    ld a, PALETTE_INVERTED_L
+    set_obj1_palette
+.done
 
     ; Initialize the RNG.
     call RNGInit
@@ -931,11 +942,22 @@ SwitchToGameplayBigB:
     call ApplyTells
 
     ; Set up the palettes.
+    ld a, [wBGMode]
+    cp a, BG_MODE_DARK
+    jr z, .dark
     ld a, PALETTE_REGULAR
     set_bg_palette
     set_obj0_palette
     ld a, PALETTE_LIGHTER_1
     set_obj1_palette
+    jr .done
+.dark
+    ld a, PALETTE_INVERTED
+    set_bg_palette
+    set_obj0_palette
+    ld a, PALETTE_INVERTED_L
+    set_obj1_palette
+.done
 
     ; Initialize the RNG.
     call RNGInit

src/state_title.asm

@@ -733,6 +733,20 @@ TitleVBlankHandlerB:
     ld bc, 4
     call UnsafeMemCopy
 
+.bg
+    ld b, 0
+    ld a, [wBGMode]
+    add a, a
+    add a, a
+    ld c, a
+    ld hl, sBGMode
+    add hl, bc
+    ld d, h
+    ld e, l
+    ld hl, TITLE_PROFILE_BG
+    ld bc, 4
+    call UnsafeMemCopy
+
     ; Tetry!
     ld a, [wSelected]
     ld hl, sTetryProfileNumber
@@ -1251,6 +1265,7 @@ ProfileHandleRight:
     jp .l2
     jp .buttons
     jp .filter
+    jp .bg
     no_jump
     no_jump
 
@@ -1322,6 +1337,19 @@ ProfileHandleRight:
     ld [rFilterMode], a
     ret
 
+.bg
+    ld a, [wBGMode]
+    cp a, BG_MODE_COUNT-1
+    jr z, :+
+    inc a
+    ld [wBGMode], a
+    ld [rBGMode], a
+    ret
+:   xor a, a
+    ld [wBGMode], a
+    ld [rBGMode], a
+    ret
+
 
 ProfileHandleLeft:
     ld a, [wSelected]
@@ -1346,6 +1374,7 @@ ProfileHandleLeft:
     jp .l2
     jp .buttons
     jp .filter
+    jp .bg
     no_jump
     no_jump
 
@@ -1417,6 +1446,19 @@ ProfileHandleLeft:
     ld [rFilterMode], a
     ret
 
+.bg
+    ld a, [wBGMode]
+    or a, a
+    jr z, :+
+    dec a
+    ld [wBGMode], a
+    ld [rBGMode], a
+    ret
+:   ld a, BG_MODE_COUNT-1
+    ld [wBGMode], a
+    ld [rBGMode], a
+    ret
+
 
 ProfileHandleDown:
     ld a, [wSelected]