add cheat for Genetic Drift

res/history.md

@@ -9,7 +9,7 @@
 
  - Added help screen (press ? in search or browse mode to show)
  - Added global cheat mode (press Ctrl-C in search or browse mode to toggle)
- - Added 43 game cheats
+ - Added 44 game cheats
  - Fixed corrupted graphics in Asteroid Blaster
  - Fixed corrupted graphics in Sneakers game, demo, and screenshots, and now we are entirely done with this I promise
  - Added missing levels in Out Of This World

src/prelaunch/genetic.drift.a

@@ -0,0 +1,18 @@
+;license:MIT
+;(c) 2019 by 4am
+
+!cpu 6502
+!to "build/PRELAUNCH/GENETIC.DRIFT",plain
+*=$106
+
+         !source "src/prelaunch/common.a"
+
+         lda   #<patch
+         sta   $0859
+         lda   #>patch
+         sta   $085A
+         jmp   $0800      ; decompress and show title and decompress again
+patch
+         lda   #$A5
+         sta   $5846      ; patch - don't decrease lives
+         jmp   $57D7