Fix small bug in returning to big mode from final challenge retry and fully implement TGM1 grades.

src/field.asm

@@ -40,6 +40,7 @@ wDelayState: ds 1
 wLeftSlamTimer: ds 1
 wRightSlamTimer: ds 1
 wMovementLastFrame: ds 1
+wReturnToSmall:: ds 1
 
 
 SECTION "High Field Variables", HRAM
@@ -238,6 +239,8 @@ FromBackupField::
     jp UnsafeMemCopy
 
 GoBig::
+    ld a, $FF
+    ld [wReturnToSmall], a
     ld hl, wWideBlittedField
     ld bc, 10*22
     ld d, TILE_BLANK
@@ -2514,6 +2517,33 @@ BigFieldClear::
     ret
 
 
+GoSmall::
+    xor a, a
+    ldh [hBravo], a
+    ldh [hLineClearCt], a
+    ld [wMovementLastFrame], a
+    ld a, 1
+    ldh [hComboCt], a
+    ld hl, wField
+    ld bc, 10*24
+    ld d, TILE_BLANK
+    call UnsafeMemSet
+    ld hl, wShadowField
+    ld bc, 14*26
+    ld d, $FF
+    call UnsafeMemSet
+    ld hl, wPreShadowField
+    ld bc, 14*2
+    ld d, $FF
+    call UnsafeMemSet
+    ld a, SLAM_ANIMATION_LEN
+    ld [wLeftSlamTimer], a
+    ld [wRightSlamTimer], a
+    ld a, STATE_GAMEPLAY
+    ldh [hGameState], a
+    ret
+
+
     ; Backs up the field.
     ; This backup field is used for pausing the game.
 BigToBackupField::

src/grading.asm

@@ -38,6 +38,9 @@ wSRate:                ds 1
 wDRate:                         ds 1
 wTRate:                         ds 1
 wQRate:                         ds 1
+wTGM1level300RequirementMet:    ds 1
+wTGM1level500RequirementMet:    ds 1
+wTGM1level999RequirementMet:    ds 1
 
 
 SECTION "Grading Data", ROM0
@@ -238,6 +241,9 @@ GradeInit::
     ld [wEffectTimer], a
     ld [wDecayCounter], a
     ld [wGradeGauge], a
+    ld [wTGM1level300RequirementMet], a
+    ld [wTGM1level500RequirementMet], a
+    ld [wTGM1level999RequirementMet], a
 
     ; Most modes begin ungraded.
     ld a, GRADE_NONE
@@ -683,9 +689,14 @@ UpdateGradeTGM1:
     cp a, GRADE_GM
     ret z
 
+    ; Bail if we didn't make the 999 check.
+    ld a, [wTGM1level999RequirementMet]
+    cp a, 0
+    ret nz
+
     ; Skip to GM check if already S9.
     cp a, GRADE_S9
-    jr nc, .maybegm
+    jp nc, .check999
 
 .trygradeup
     ; Otherwise, check if we can increase the grade.
@@ -724,7 +735,7 @@ UpdateGradeTGM1:
     ; Return if C < E. Otherwise increase the grade.
     ld a, c
     cp a, e
-    ret c
+    jr c, .check300
 
 .increasegrade
     ; Add 1 to the grade.
@@ -748,15 +759,118 @@ UpdateGradeTGM1:
     ; Loop and see if we can increment more grades.
     ld a, [wDisplayedGrade]
     cp a, GRADE_S9 ; Don't go past S9.
-    ret z
+    jr nz, .trygradeup
-    jr .trygradeup
 
-.maybegm
+
-    ; Level needs to be 1000 or greater.
+.check300
-    ld a, [hCLevel+CLEVEL_THOUSANDS] ; Level, thousands digit.
+    ; Are we at level 300?
-    cp a, 1
+    ld a, [hCLevel+CLEVEL_HUNDREDS]
+    cp a, 3
     ret c
 
+    ; Have we judged the requirement before?
+    ld a, [wTGM1level300RequirementMet]
+    cp a, 0
+    jr nz, .check500
+
+    ; Rank?
+    ld a, [wDisplayedGrade]
+    cp a, GRADE_1
+    jr c, .fail300
+
+    ; Time?
+    ld b, 4
+    ld c, 15
+    call CheckTorikan
+    cp a, $FF
+    jr nz, .fail300
+
+.success300
+    ld a, $FF
+    ld [wTGM1level300RequirementMet], a
+    jr .check500
+
+.fail300
+    ld a, $01
+    ld [wTGM1level300RequirementMet], a
+    jr .check500
+
+
+.check500
+    ; Are we at level 500?
+    ld a, [hCLevel+CLEVEL_HUNDREDS]
+    cp a, 5
+    ret c
+
+    ; Have we judged the requirement before?
+    ld a, [wTGM1level500RequirementMet]
+    cp a, 0
+    jr nz, .check999
+
+    ; Rank?
+    ld a, [wDisplayedGrade]
+    cp a, GRADE_S4
+    jr c, .fail500
+
+    ; Time?
+    ld b, 7
+    ld c, 30
+    call CheckTorikan
+    cp a, $FF
+    jr nz, .fail500
+
+.success500
+    ld a, $FF
+    ld [wTGM1level500RequirementMet], a
+    jr .check999
+
+.fail500
+    ld a, $01
+    ld [wTGM1level500RequirementMet], a
+    jr .check999
+
+
+.check999
+    ; Level needs to be 999.
+    ld a, [hCLevel+CLEVEL_HUNDREDS]
+    cp a, 9
+    ret nz
+    ld a, [hCLevel+CLEVEL_TENS]
+    cp a, 9
+    ret nz
+    ld a, [hCLevel+CLEVEL_ONES]
+    cp a, 9
+    ret nz
+
+    ; Have we judged the requirement before?
+    ld a, [wTGM1level999RequirementMet]
+    cp a, 0
+    ret nz
+
+    ; Did both other checks succeed?
+    ld a, [wTGM1level300RequirementMet]
+    cp a, $FF
+    jr nz, .fail999
+    ld a, [wTGM1level500RequirementMet]
+    cp a, $FF
+    jr nz, .fail999
+
+    ; Rank? (This is technically slightly wrong but it's nearly impossible to miss the real requirement but make this one, 6000 points.)
+    ld a, [wDisplayedGrade]
+    cp a, GRADE_S9
+    jr c, .fail999
+
+    ; Time?
+    ld b, 13
+    ld c, 30
+    call CheckTorikan
+    cp a, $FF
+    jr nz, .fail999
+
+.success999
+    ld a, $FF
+    ld [wTGM1level999RequirementMet], a
+
     ; Set the grade to GM
     ld a, GRADE_GM
     ld [wDisplayedGrade], a
@@ -773,6 +887,11 @@ UpdateGradeTGM1:
     ; Return
     ret
 
+.fail999
+    ld a, $01
+    ld [wTGM1level999RequirementMet], a
+    ret
+
 
 UpdateGradeDEAT:
     ; If we're disqualified, don't update the grade.

src/state_gameplay.asm

@@ -223,6 +223,8 @@ GamePlayEventLoopHandlerB::
     call SFXKill
     ld a, SFX_READYGO
     call SFXEnqueue
+    xor a, a
+    ld [wReturnToSmall], a
     ldh a, [hModeCounter]
 .firstleadyiterskip
     dec a
@@ -1002,6 +1004,8 @@ GamePlayBigEventLoopHandlerB:
     call SFXKill
     ld a, SFX_READYGO
     call SFXEnqueue
+    xor a, a
+    ld [wReturnToSmall], a
     ldh a, [hModeCounter]
 .firstleadyiterskip
     dec a
@@ -1397,6 +1401,9 @@ GamePlayBigEventLoopHandlerB:
     ldh a, [hAState]
     cp a, 10 ; 10 frame hold
     jr nz, .noretry
+    ld a, [wReturnToSmall]
+    cp a, $FF
+    jr z, .gosmall
     call CheckAndAddHiscore
     call RNGInit
     call ScoreInit
@@ -1412,6 +1419,23 @@ GamePlayBigEventLoopHandlerB:
     ldh [hModeCounter], a
     jp .drawStaticInfo
 
+.gosmall
+    call CheckAndAddHiscore
+    call RNGInit
+    call ScoreInit
+    call LevelInit
+    call GoSmall
+    call GradeInit
+    xor a, a
+    ldh [hHoldSpent], a
+    ld [wInStaffRoll], a
+    ld a, MODE_LEADY
+    ldh [hMode], a
+    ld a, LEADY_TIME
+    ldh [hModeCounter], a
+    jp .drawStaticInfo
+
+
     ; Quit
 .noretry
     ldh a, [hBState]