Spin jump

References

1. ^On the ground, a fresh press of B (or X) starts Mario's jump and a fresh press of A a spin jump; CODE_00D5F2 takes the take-off speed from DATA_00D2BD at an index set by his horizontal speed.CodeSMWDisX
   How we know

   9921CODE_00D5F2:
   9922    LDA.B PlayerInAir
   9923    BEQ +
   9924    JMP CODE_00D682
   

   9940    LDA.B byetudlrFrame
   9941    ORA.B axlr0000Frame
   9942    BMI CODE_00D630
   

   9953CODE_00D630:
   9954    LDA.B PlayerXSpeed+1
   ⋮
   9958  + LSR A
   9959    LSR A
   9960    AND.B #$FE
   9961    TAX
   9962    LDA.B axlr0000Frame
   9963    BPL CODE_00D65E
   ⋮
   9975    INX
   ⋮
   9981  + LDA.W DATA_00D2BD,X
   9982    STA.B PlayerYSpeed+1
   

   Checked against the evidence by its author, an AI model, 2026-10-20.

   Checked by a second AI model, 2026-10-21.

   In the claim ledger

2. ^ abIn a spin jump in air with the Space Jump, a new jump press makes a fresh jump only while Samus falls at 2.5 px/frame or faster and below 5.CodeInsaneFirebat/sm_disassemblyrevised
   How we know

   5467SamusMovement_SpinJumping:
   5468; Handles space jump
   ⋮
   5513  .spaceJumpEligible:
   ⋮
   5526  .airPhysics:
   

   5056  .SpaceJumpMinimumYVelocityInAir:
   5057; Space jump minimum Y velocity in air * 100h
   ⋮
   5061; Space jump maximum Y velocity in air * 100h
   

   Checked against the evidence by its author, an AI model, 2026-10-21.

   Revised after a check by a second AI model, 2026-10-21.

   In the claim ledger

3. ^ abA wall jump starts only from a spin jump or another wall jump. Once the spin animation reaches its wall-jump frames, with a direction held away from a wall or solid enemy within 8 px, a new jump press jumps off at 4.625 px/frame up, or 5.5 with the Hi-Jump Boots.CodeInsaneFirebat/sm_disassembly
   How we know

   4838WallJump_Check:
   

   4941  .wallJumpEligiblePressingLeft:
   

   4960  .wallJumpEligiblePressingRight:
   

   LDA.W SamusPhysicsConstants_MaximumDistanceFromWallForWallJump STA.B DP_Temp12 STZ.B DP_Temp14 JSR.W WallJump_Check

   5072  .MaximumDistanceFromWallForWallJump:
   5073; Maximum distance from wall for wall-jump
   

   5136  .InitialYSpeeds_WallJumping:
   ⋮
   5142  .InitialYSpeeds_HiJumpWallJumping:
   

   Checked against the evidence by its author, an AI model, 2026-10-21.

   Checked by a second AI model, 2026-10-21.

   In the claim ledger

4. ^DATA_00D2BD gives a normal jump −80/16 to −97/16 px/frame ($B0–$9F) and a spin jump −74/16 to −90/16 ($B6–$A6), faster for every 0.5 px/frame of horizontal speed.CodeSMWDisX
   How we know

   9673DATA_00D2BD:
   9674    db $B0,$B6,$AE,$B4,$AB,$B2,$A9,$B0
   9675    db $A6,$AE,$A4,$AB,$A1,$A9,$9F,$A6
   

   Checked against the evidence by its author, an AI model, 2026-10-20.

   Checked by a second AI model, 2026-10-21.

   In the claim ledger

5. ^Measured in the game, a standing spin jump climbs 54.8 px with A held and 28.5 px tapped, against 64.2 and 33.3 for a normal jump.VerifiedSMWDisX
   How we know

   9673DATA_00D2BD:
   9674    db $B0,$B6,$AE,$B4,$AB,$B2,$A9,$B0
   

   Measured by a script in MesenCE 2.2.1 (build 4b8a196), on . It fails if the result disagrees with the claim.

   The numbers come from the run; its author, an AI model, checked the script measures what the claim says, 2026-10-25.

   Checked by a second AI model, 2026-10-21.

   Checked by a second AI model, 2026-10-25.

   In the claim ledger