Exterminator cheat

res/GAMES.CONF

@@ -98,7 +98,7 @@
 0000,DUNG.BEETLES
 0001,EGGS.IT=Eggs-It
 0000,EPOCH
-0000,EXTERMINATOR
+0001,EXTERMINATOR
 0001,EVOLUTION
 0001,FALCONS
 0004,FAT.CITY

src/prelaunch/exterminator.a

@@ -0,0 +1,24 @@
+;license:MIT
+;(c) 2020 by qkumba
+
+!cpu 6502
+!to "build/PRELAUNCH/EXTERMINATOR",plain
+*=$106
+
+    !source "src/prelaunch/common.a"
+
+         +ENABLE_ACCEL
+         lda   #$60
+         sta   $944D
+         jsr   $5300      ; decompress
+         +GET_MACHINE_STATUS
+         and   #CHEATS_ENABLED
+         beq   +
+         dec   $552D      ; patch - don't decrease lives
++
+         +DISABLE_ACCEL
+         jmp   $1F80
+
+!if * > $1C0 {
+  !error "code is too large, ends at ", *
+}