This document maps different ROM and RAM values that are useful for the hack.
$0450: Facing. 1 if left, 0 if right.
$046C: state variable A | 0: standing/walking | 1: jumping | 2: attacking & subweapon | 3: crouching | 4: stairs | 5: knockback | 6: walk to stair | 7: falling | 8: dead | 9: stunned
$434: attack variable | 00: not attacking | 01: attacking (ground) | 02: attacking (crouch) | 03: attacking (air)
$0584: state variable B | 0: standing | 1: walking right | 2: walking left | 4: crouching | 40: attacking | 80: air, vertical | 81: air, right | 82: air, left
$0049: simon's horizontal speed (?) $0052: simon's horizontal speed (?) | FF: right | 00: stopped | 01: left $0051: $FF iff simon-hspeed is $FF.
$96A1: hit invulnerability timer
$04DC: vertical speed (magnitude). | start of jump: 90 | crest: A4->A2 | end: 8F $514: vertical direction | 0: up | 1: down $0488: an increasing counter related to simon's animation. Value at crest: 16
$054c: Stun timer. This must not be negative when simon begins jumping or the game will freak out.
$0017: "Game Mode" (see "Game-mode-specific step code" below) $00F5: buttons pressed this frame $00F7: held down buttons (includes buttons pressed this frame) $0042: time remaining in seconds (last two digits).
06:944A: simon step event turn around 01937C: Jump Table
step dispatch: 07:c1A1 (ROM 01c1b1) jump-to-table subroutine: 07:CA1E (ROM 01ca2e) jump table: 07:C1B1 (ROM 01C1C0) | contents: DCB7 23B8 59B8 D2B8 11B9 EFC1 8FC2 DDC2 33C3 98C4 98C4 9386 A6C5 F8C7 EE86 4B8B FEFA A908 8525
Jumps off of "Game mode" value in $18 $18 values | 0: first frame of game | 1: title screen | 2: title screen demo gameplay | 5: normal gameplay; pre-demo loading (~17 frames) | 6: dead; reload level (and post-demo 1, due to death) | 7: game over