add cheat for Jumpman

res/history.md

@@ -11,7 +11,7 @@
 
  - 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 54 game cheats
+ - Added 55 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
  - Fixed Axis Assassin demo hanging on IIgs

src/prelaunch/jumpman.a

@@ -0,0 +1,23 @@
+;license:MIT
+;(c) 2019 by 4am
+
+!cpu 6502
+!to "build/PRELAUNCH/JUMPMAN",plain
+*=$106
+
+         !source "src/prelaunch/common.a"
+
+         +ENABLE_ACCEL
+         lda   #$60
+         sta   $406E
+         jsr   $4000      ; decompress
+         +GET_MACHINE_STATUS
+         and   #CHEATS_ENABLED
+         beq   +
+         lda   #$A5
+         sta   $8FF3      ; patch - don't decrease lives
+         sta   $93B1      ; patch - don't decrease lives
+         sta   $A598      ; patch - don't increase lives
++
+         +DISABLE_ACCEL
+         jmp   $8000