fix Spy vs Spy white end screen

res/ATTRACT/ANGRYBIRDS

@@ -0,0 +1,7 @@
+#
+# Attract mode for ANGRYBIRDS
+# This file is automatically generated
+#
+
+
+[eof]

res/ATTRACT/APPLZ

@@ -0,0 +1,9 @@
+#
+# Attract mode for APPLZ
+# This file is automatically generated
+#
+
+APPLZ2=A
+APPLZ=A
+
+[eof]

res/CREDITS

@@ -3,7 +3,7 @@
 
                     ~
 
- revision 5.0.1 / serial number 20231113
+  revision 5.1 / serial number 20240216
 
                     ~
 

res/GAMEHELP/ANGRYBIRDS

@@ -0,0 +1,25 @@
+      Shoot the birds at the pigs
+
+                  A
+
+           move M    N move
+
+                Y or Z
+
+          button 0 to launch
+
+
+Q* * * * * * * * * * * * * * * * * *quit
+
+B * * * * * * * * * * * * * * cycle bird
+
+T * * * * * * * * * * * * * *view target
+
+S * * * * * * * * * * * * * * * * *sound
+
+R * * * * * * * * * * * * * replay level
+
+L * * * * * * * * * * * * * * * level up
+
+J * * * * * * * * * * * * * * level down
+[eof]

res/GAMEHELP/APPLZ

@@ -0,0 +1,23 @@
+
+          Hit blocks to remove
+
+     Hit apples to accumulate more
+
+
+
+            joystick to move
+
+            button 0 to fire
+
+
+           move  <   >  move
+
+             Space to fire
+
+
+K / J* * * * * * * * keyboard / joystick
+
+S* * * * * * * * * * * * * * * * * sound
+
+D* * * * * * * * * * * * * * *difficulty
+[eof]

res/GAMES.CONF

@@ -36,7 +36,7 @@
 00011,ALIEN.TYPHOON=Alien Typhoon
 11110,ALIENS=Aliens
 10061,ANGEL.1=Angel-1
-01000,ANGRYBIRDS=Angry Birds
+01100,ANGRYBIRDS=Angry Birds
 00001,ANKH=Ankh
 00010,APE.ESCAPE=Ape Escape
 00010,AC=Apple Cider Spider
@@ -58,7 +58,7 @@
 10011,AS=Asteroid Blaster
 10041,ASCEND=Ascend
 10011,AXIS.ASSASSIN=Axis Assassin
-00000,AZTEC=Aztec
+00030,AZTEC=Aztec
 10010,BQ=BC's Quest for Tires
 11110,BAD.DUDES=Bad Dudes
 10001,BALLBLAZER=Ballblazer

res/SS/AB1.CONF

@@ -11,5 +11,6 @@ BK
 BUTCHERBOB.86
 ALF
 AQUATRON
+APPLZ
 
 [eof]

res/SS/ACTIONAB3.CONF

@@ -8,6 +8,7 @@ ALIEN.MUNCHIES
 B13=B1
 BB
 BOOTSKELL2=BOOTSKELL
+APPLZ
 ALIEN.AMBUSH
 BR2=BR
 BW

res/SS/ACTIONAB6.CONF

@@ -8,6 +8,7 @@ AXIS.ASSASSIN2=AXIS.ASSASSIN
 B16=B1
 BEZOFF
 AA
+APPLZ2=APPLZ
 BANDITS
 BATTLOT
 BLACK.MAGIC3=BLACK.MAGIC

res/SS/INDIE.CONF

@@ -11,5 +11,6 @@ BERZAP
 CS
 GADGETZ
 BOOTSKELL
+APPLZ
 
 [eof]

res/history.md

@@ -1,5 +1,22 @@
 # Total Replay changelog
 
+## Revision 5.1 / serial number 20240216
+
+### Games added in v5.1
+
+- Angry Birds
+- Applz
+
+### Enhancements & bug fixes in v5.1
+
+- Upgrade Aztec to retail version
+- Fix crash in Serpentine ([issue 559](https://github.com/a2-4am/4cade/issues/559), thanks audetto)
+- Fix reset issues in Battle Cruiser
+- Fix Mockingboard issues in Berzap, Crime Wave, Mapple
+- Fix compatibility issues in Deathsword ([issue 556](https://github.com/a2-4am/4cade/issues/556), thanks JDW1)
+- Fix compatibility issues in Flapple Bird
+- Fix text display issues during boot
+
 ## Revision 5.0.1 / serial number 20231113
 
 - Fix display issue after quitting DGR games ([PR 549](https://github.com/a2-4am/4cade/pull/549), thanks Tom G.)
@@ -60,7 +77,6 @@
 - Defender (Joe Holt)
 - Demonic Decks
 - Depth Charge
-- Dive Bomber
 - Dragonfire
 - Early Bird
 - Escape
@@ -158,7 +174,6 @@
 - Star Maze
 - Starball
 - Starmines
-- Super Huey
 - Super Puckman
 - Super Taxman 2
 - Sword of Sheol
@@ -200,7 +215,6 @@
 - Battle Chess
 - Bop'n Wrestle
 - California Games
-- Dive Bomber
 - Fight Night
 - Flight Simulator II
 - Formula 1 Racer
@@ -220,7 +234,6 @@
 - Street Sports Soccer
 - Summer Games
 - Summer Games II
-- Super Huey
 - Tag Team Wrestling
 - Test Drive
 - The Dam Busters
@@ -529,3 +542,209 @@
 ## Revision 1 / serial number 190720
 
 - Initial release
+
+### Games included in v1.0
+
+- Agent U.S.A.
+- Airheart
+- Alcazar
+- Alien Ambush
+- Alien Downpour
+- Alien Rain
+- Alien Typhoon
+- Alien Munchies
+- Ankh
+- Apple Cider Spider
+- Apple Panic
+- Aquatron
+- Argos
+- Arkanoid
+- Axis Assassin
+- Bad Dudes
+- Ballblazer
+- Batman
+- Battlezone
+- BC's Quest For Tires
+- Beer Run
+- Bellhop
+- Berzap
+- Bill Budge's Trilogy
+- Black Magic
+- Blister Ball
+- BlockChain
+- Bolo
+- Bouncing Kamungas
+- Brainteaser Boulevard
+- Bruce Lee
+- Bubble Bobble
+- BurgerTime
+- Buzzard Bait
+- Cannonball Blitz
+- Canyon Climber
+- Captain Goodnight
+- Castle Wolfenstein
+- Ceiling Zero
+- Centipede
+- Championship Lode Runner
+- Choplifter
+- Commando
+- Conan
+- Crazy Mazey
+- Crime Wave
+- Crisis Mountain
+- Crossfire
+- Cubit
+- Cyber Strike
+- Cyclod
+- D-Generation
+- David's Midnight Magic
+- Death Sword
+- Defender
+- Dig Dug
+- Dino Eggs
+- Donkey Kong
+- Drelbs
+- Drol
+- Dung Beetles
+- Eggs-It
+- Epoch
+- Falcons
+- Flight Simulator I
+- Flip Out
+- Firebird
+- Formula 1 Racer
+- Frogger
+- Frogger II
+- Galaxian
+- Galaxy Gates
+- Gamma Goblins
+- Genetic Drift
+- Gold Rush
+- Gorgon
+- Gremlins
+- Gumball
+- Hadron
+- H.E.R.O
+- Hard Hat Mack
+- Head On
+- Heavy Barrel
+- High Rise
+- Horizon V
+- Hungry Boy
+- Ikari Warriors
+- Impossible Mission
+- International Gran Prix
+- Joust
+- Juggler
+- Jumpman
+- Jungle Hunt
+- Kamikaze
+- Karateka
+- Kid Niki
+- Labyrinth
+- Lady Tut
+- Lancaster
+- Laser Bounce
+- Lazer Silk
+- Lode Runner
+- Lost Tomb
+- Mad Bomber
+- Marble Madness
+- Mario Bros
+- Miner 2049er
+- Montezuma's Revenge
+- Moon Patrol
+- Mr. Cool
+- Mr. Do
+- Mr. Robot
+- Ms. Pacman
+- Nibbler
+- Night Mission Pinball
+- Night Stalker
+- Nightmare Gallery
+- NORAD
+- O'Riley's Mine
+- Orbitron
+- Outpost
+- Pac-Man
+- Paperboy
+- Pest Patrol
+- Phantoms Five
+- Phaser Fire
+- Photar
+- Picnic Paranoia
+- Pie-Man
+- Pipe Dream
+- Pit Stop II
+- Pitfall II
+- Plasmania
+- Platoon
+- Pollywog
+- Pooyan
+- Prince of Persia
+- Puckman
+- Qix
+- Quadrant 6112
+- Radwarrior
+- Rampage
+- Raster Blaster
+- Red Alert
+- Renegade
+- Repton
+- Rescue Raiders
+- Ribbit
+- Roadblock
+- Robocop
+- Robotron 2084
+- Russki Duck
+- Sabotage
+- Sammy Lightfoot
+- Serpentine
+- Shamus
+- Shuffleboard
+- Snack Attack
+- Snake Byte
+- Sneakers
+- Snoggle
+- Space Eggs
+- Space Quarks
+- Space Raiders
+- Spare Change
+- Speedway Classic
+- Spider Raid
+- Spiderbot
+- Spy Hunter
+- Spy's Demise
+- Starblaster
+- Stargate
+- Star Blazer
+- Stellar 7
+- Succession
+- Suicide!
+- Swashbuckler
+- Tag Team Wrestling
+- Tapper
+- Tetris
+- Tetris (DHGR)
+- The Bilestoad
+- The Games: Summer Edition
+- The Games: Winter Edition
+- The Goonies
+- Thexder
+- Thexder (DHGR)
+- Thief
+- Threshold
+- Thunder Bombs
+- Tomahawk
+- Track & Field
+- Tubeway ][
+- Tunnel Terror
+- Twerps
+- Up'n Down
+- Victory Road
+- Vindicator
+- Warp Destroyer
+- Wavy Navy
+- Xevious
+- Zaxxon
+- Zenith

src/4cade.init.a

@@ -164,6 +164,12 @@
          +READ_ROM_WRITE_RAM2
          jsr   init                  ; initialize and relocate ProRWTS2 to $D400 in RAM bank 2
                                      ; ProRWTS2 disk-data live at $D000-D3FF
+         sei                         ; we're about to overwrite ProDOS's IRQ handler
+         lda   #<NOIRQ
+         sta   $3FE
+         lda   #>NOIRQ               ; in case another routine re-enables them
+         sta   $3FF
+         cli
          ldx   #$00                  ; relocate program code to top of language card
                                      ; since we end at $0000 now, adjust low offset to avoid destroying zpage
 @FM      lda   FirstMover - (RELBASE & $FF),x
@@ -281,6 +287,8 @@ FoundMockingboardCallback
          ora   #$B0
          jmp   ROM_COUT
 
+NOIRQ    rti
+
          !src  "src/4cade.branding.a"
          !src  "src/4cade.version.a"
 

src/4cade.version.a

@@ -1,5 +1,5 @@
 ;license:MIT
-;(c) 2023 by 4am
+;(c) 2023-2024 by 4am
 ;
 
 !ifndef RELEASE {
@@ -11,5 +11,5 @@ LoadingBuild
 } else {
 LoadingVersion
          !byte 12
-         !text "      v5.0.1"
+         !text "        v5.1"
 }

src/index/artwork.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15454763
+         !be24  15465541
          !le16     5112

src/index/attract.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15400096
+         !be24  15410820
          !le16     5695

src/index/cache00.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15333016
+         !be24  15343740
          !le16     4043

src/index/cache01.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15347263
+         !be24  15357987
          !le16     4508

src/index/cache10.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15365423
+         !be24  15376147
          !le16     5840

src/index/cache11.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15386272
+         !be24  15396996
          !le16     6466

src/index/coverfade.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15459875
+         !be24  15470653
          !le16      410

src/index/credits.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15460629
-         !le16      450
+         !be24  15471407
+         !le16      449

src/index/decrunch.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15461079
+         !be24  15471856
          !le16      303

src/index/demo.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  12303683
+         !be24  12314407
          !le16     1652

src/index/dfx.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15408431
+         !be24  15419155
          !le16     1640

src/index/dgr.fizzle.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15460361
+         !be24  15471139
          !le16       67

src/index/dgr.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15454704
+         !be24  15465482
          !le16       59

src/index/dhgr.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15453160
+         !be24  15463938
          !le16     1426

src/index/dtitle.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15437394
-         !le16      540
+         !be24  15448130
+         !le16      557

src/index/fx.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15405791
+         !be24  15416515
          !le16     2640

src/index/gamehelp.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15410429
+         !be24  15421153
          !le16     7358

src/index/gr.fizzle.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15460285
+         !be24  15471063
          !le16       76

src/index/gr.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15454586
+         !be24  15465364
          !le16      118

src/index/helptext.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15460428
+         !be24  15471206
          !le16      201

src/index/hgr0.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15437934
-         !le16     4897
+         !be24  15448687
+         !le16     4922

src/index/hgr1.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15442831
+         !be24  15453609
          !le16     1775

src/index/hgr2.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15444606
+         !be24  15455384
          !le16     1181

src/index/hgr3.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15445787
+         !be24  15456565
          !le16     3421

src/index/hgr4.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15449208
+         !be24  15459986
          !le16     3359

src/index/hgr5.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15452567
+         !be24  15463345
          !le16      479

src/index/hgr6.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15453046
+         !be24  15463824
          !le16      114

src/index/joystick.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15461382
+         !be24  15472159
          !le16     2370

src/index/miniattract0.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15423161
-         !le16     4933
+         !be24  15433885
+         !le16     4962

src/index/miniattract1.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15428094
+         !be24  15438847
          !le16     2400

src/index/prelaunch.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15392738
+         !be24  15403462
          !le16     7358

src/index/res.cover.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  4156928
+         !be24  4165632
          !le16     8192

src/index/res.help.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  4173312
+         !be24  4182016
          !le16     8192

src/index/res.title.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  4165120
+         !be24  4173824
          !le16     8192

src/index/search00.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15323749
+         !be24  15334473
          !le16     9267

src/index/search01.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15337059
+         !be24  15347783
          !le16    10204

src/index/search10.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15351771
+         !be24  15362495
          !le16    13652

src/index/search11.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15371263
+         !be24  15381987
          !le16    15009

src/index/sfx.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15410071
+         !be24  15420795
          !le16      358

src/index/slideshow.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15417787
+         !be24  15428511
          !le16     5374

src/index/title.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15430494
-         !le16     6900
+         !be24  15441247
+         !le16     6883

src/index/xsingle.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15319531
+         !be24  15330255
          !le16     4218

src/prelaunch/angrybirds.a

@@ -9,8 +9,8 @@
 
          +ENABLE_ACCEL
          lda   #$60
-         sta   $2636
-         jsr   $24BC      ; decompress
+         sta   $2606
+         jsr   $248C      ; decompress
          +DISABLE_ACCEL
          jmp   $D566
 

src/prelaunch/aztec.a

@@ -1,5 +1,5 @@
 ;license:MIT
-;(c) 2019-2020 by qkumba
+;(c) 2023 by qkumba
 
 !cpu 6502
 !to "build/PRELAUNCH.INDEXED/AZTEC",plain
@@ -9,13 +9,27 @@
 
          +ENABLE_ACCEL
          lda   #$60
-         sta   $A00
-         jsr   $800       ; find and load "DOS"
-         lda   #<callback
-         sta   $B748
-         lda   #>callback
-         sta   $B749
-         jmp   $B700
+         sta   $1F3C
+         jsr   $1E60      ; decompress
+         lda   #$20
+         sta   $6571
+         lda   #<keypress
+         sta   $6572
+         lda   #>keypress
+         sta   $6573
+         +GET_MACHINE_STATUS
+         and   #CHEATS_ENABLED
+         beq   +
+         lda   #$AD
+         sta   $61B5
+         sta   $61BD
+         sta   $61C3
+         sta   $61D0
+         sta   $52D7
+         sta   $144B
++
+         +DISABLE_ACCEL
+         jmp   $1B00
 
 keypress
          lda   $C000
@@ -25,37 +39,6 @@ keypress
          lda   #$8D
          rts
 
-intercept
-         jsr   $BD5F
-         jsr   $BD09
-         lda   $656B
-         cmp   #$2C
-         clc
-         bne   +
-         lda   #$20
-         sta   $656B
-         lda   #<keypress
-         sta   $656C
-         lda   #>keypress
-         sta   $656D
-+        rts
-
-callback
-         ldx   #0
-         stx   $9E52
-         inx
-         stx   $9E53      ; reset vector patch
-         lda   #$4C
-         sta   $BD06
-         lda   #<intercept
-         sta   $BD07
-         lda   #>intercept
-         sta   $BD08
-         sta   $656B
-
-         +DISABLE_ACCEL
-         jmp   $9D84
-
 !if * > $1C0 {
   !error "code is too large, ends at ", *
 }

src/prelaunch/battle.cruiser.a

@@ -1,5 +1,5 @@
 ;license:MIT
-;(c) 2020, 2022 by qkumba
+;(c) 2020, 2022, 2023 by qkumba
 
 !cpu 6502
 !to "build/PRELAUNCH.INDEXED/BATTLE.CRUISER",plain
@@ -12,31 +12,28 @@
          sta   $2027
          jsr   $2000      ; decompress
 
+         tax
          +GET_MOCKINGBOARD_SPEECH_AND_MACHINE_STATUS
          bvs   +
-         ldy   #0
-         sty   $868
-         sty   $9486
-         ldy   #$60
-         sty   $B000      ; no speech chip, pretend no MB
+         stx   $868
+         stx   $9486
+         ldx   #$60
+         stx   $B000      ; no speech chip, pretend no MB
 +        and   #CHEATS_ENABLED
          beq   +
          lda   #$a5
          sta   $A22       ; patch - don't decrease lives
 +
-         lda   #$4C
-         sta   $8FFF
-         sta   $9010
-         lda   #<callback1
-         sta   $9000
-         lda   #>callback1
-         sta   $9001
-         lda   #<callback2
-         sta   $9011
-         lda   #>callback2
-         sta   $9012
+         iny
+-        lda   call1, y
+         sta   $8FFF, y
+         lda   call2, y
+         sta   $9010, y
+         dey
+         bpl   -
          lda   #$C5
          sta   $902A
+         +NEW_RESET_VECTOR $110
          +DISABLE_ACCEL
          jmp   $845
 
@@ -56,6 +53,9 @@ callback2
          bcs   -
          jmp   $902C
 
+call1    jmp   callback1
+call2    jmp   callback2
+
 !if * > $1C0 {
   !error "code is too large, ends at ", *
 }

src/prelaunch/berzap.mb.a

@@ -98,17 +98,19 @@ setopt
 
          ldy   #0
          sty   $382       ; joystick
-         ldx   #2
-         iny              ; Sound/Speech I
 
+         ldx   #4
+         ldy   #2
          +READ_RAM2_NO_WRITE
          bit   MockingboardStuff
-         bmi   +          ; SC-01
-         ldx   #0
-         dey              ; Sound II
-         bvc   +          ; no speech
-         ldx   #4
-         ldy   #2         ; Mockingboard "C"
+         bvs   +          ; Mockingboard "C"
+         php
+         ldx   #2
+         dey
+         plp
+         bmi   +          ; Sound / Speech (mono, SC-01)
+         dex
+         dey              ; Sound II / A (stereo, no speech)
 +        stx   $380
          sty   $381
          lda   #$0D

src/prelaunch/crime.wave.a

@@ -22,9 +22,7 @@
                           ; reset vector in high score file
                           ; gets loaded directly to $300
          lda   MockingboardStuff
-         asl
          bpl   skipmb
-         lsr
          and   #7
          sta   $A0C9
          lda   #2

src/prelaunch/mapple.a

@@ -44,10 +44,31 @@ skip
          lda   #>callback
          sta   $50BF
 +
+         lda   MockingboardStuff
+         beq   no_mb
+         and   #7
+         ora   #$C0
+         ldx   #0
+mb_page1
+         ldy   $6D00, x
+         cpy   #$C4
+         bne   +
+mb_page2
+         sta   $6D00, x
++        inx
+         bne   mb_page1
+         inc   mb_page1+2
+         inc   mb_page2+2
+         dec   pages
+         bne   mb_page1
+
+no_mb
          jsr   DisableAccelerator
          +READ_ROM_NO_WRITE
          jmp   $4000
 
+pages    !byte 3
+
 !if * > $1C0 {
   !error "code is too large, ends at ", *
 }