Mach Rider:RAM map

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Zero Page

Address Entry size # of entries Description Notes
$00 1 byte 5 Current score Decimal digits
$08 2 bytes 1 X-position Signed
$17 1 byte 1 Stage #
$1E 1 byte 1 Game Mode
  • 00 - Fighting Course
  • 01 - Endurance Course
  • 02 - Solo Course
  • 03 - Design
$3F 1 byte 1 Global timer Runs while unpaused
$5C 2 bytes 1 Energy
$5F 1 byte 1 Shot
$60 2 bytes 1 To Go Decimal digits
$62 1 byte 1 To Go (subunits) Hexadecimal
$63 1 byte 1 Lives
$70 1 byte 1 Game Over flag
$71 1 byte 1 Power-up flags
  • 04 - powerful shots
  • 02 - unlimited auto-shots
  • 01 - invulnerable to rocks & barrels
$0780 1 byte 6 # of each car color destroyed
$0786 1 byte 6 # of each car color blocked
$078C 1 byte 1 Middle-of-road barrels destroyed
$078D 1 byte 1 Floating orbs destroyed
$078E 1 byte 1 Side-of-road barrels destroyed
$0794 5 bytes 3 Top Score for each game mode Decimal digits