faster this, cheat at that

src/prelaunch/bcs.quest.a

@@ -0,0 +1,27 @@
+;license:MIT
+;(c) 2019 by qkumba
+
+!cpu 6502
+!to "build/PRELAUNCH/BCS.QUEST",plain
+*=$106
+
+    !source "src/prelaunch/common.a"
+
+         +ENABLE_ACCEL
+         lda   #<cheat
+         sta   $3e09
+         lda   #>cheat
+         sta   $3e0a
+         jmp   $800      ; decompress
+
+cheat
+         jsr   $200
+         +GET_MACHINE_STATUS
+         and   #CHEATS_ENABLED
+         beq   +
+         lda   #$ad
+         sta   $1eeb      ; patch - don't increase lives
+         sta   $7a4e      ; patch - don't decrease lives
++
+         +DISABLE_ACCEL
+         rts

src/prelaunch/berzap.a

@@ -0,0 +1,39 @@
+;license:MIT
+;(c) 2019 by qkumba
+
+!cpu 6502
+!to "build/PRELAUNCH/BERZAP",plain
+*=$106
+
+    !source "src/prelaunch/common.a"
+
+         +ENABLE_ACCEL
+         lda   #<cheat1
+         sta   $871
+         lda   #>cheat1
+         sta   $872
+         jmp   $800       ; decompress
+
+cheat1
+         lda   #$4c
+         sta   $b20b
+         lda   #<cheat2
+         sta   $b20c
+         lda   #>cheat2
+         sta   $b20d
+         jmp   $b000
+
+cheat2
+         +DISABLE_ACCEL
+         lda   $b2cf
+         cmp   #$2b
+         bne   +
+         +GET_MACHINE_STATUS
+         and   #CHEATS_ENABLED
+         beq   +
+         lda   #$ad
+         sta   $3d94      ; patch - don't decrease lives
+         sta   $6573      ; patch - don't increase lives
+         sta   $76ba      ; patch - don't increase lives
++
+         jmp   ($b2ce)

src/prelaunch/burgertime.a

@@ -7,9 +7,17 @@
 
     !source "src/prelaunch/common.a"
 
+         +ENABLE_ACCEL
          lda   #$60
+         sta   $3ec9
          sta   $3f03
          jsr   $3e97
+         +DISABLE_ACCEL
+         lda   #$b1
+         sta   $646b
+         jsr   $6400
+         +ENABLE_ACCEL
+         jsr   $811
          +GET_MACHINE_STATUS
          and   #CHEATS_ENABLED
          beq   +
@@ -19,4 +27,5 @@
          sta   $94d1
          sta   $9768
 +
+         +DISABLE_ACCEL
          jmp   $a300

src/prelaunch/joust.a

@@ -7,9 +7,15 @@
 
     !source "src/prelaunch/common.a"
 
+         +ENABLE_ACCEL
          lda   #$60
+         sta   $82f
          sta   $85e
          jsr   $800       ; decompress and show title/options screens
+         +DISABLE_ACCEL
+         jsr   $7000
+         +ENABLE_ACCEL
+         jsr   $832
          +GET_MACHINE_STATUS
          and   #CHEATS_ENABLED
          beq   +
@@ -17,4 +23,5 @@
          sta   $2bc9
          sta   $2b6b
 +
+         +DISABLE_ACCEL
          jmp   $3e00