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Ys IV: The Dawn of Ys

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Title Screen

Ys IV: The Dawn of Ys

Publisher: Hudson Soft
Platform: TurboGrafx-CD
Released in JP: December 22, 1993

DebugIcon.png This game has debugging material.
SoundtestIcon.png This game has a hidden sound test.
LevelSelectIcon.png This game has a hidden level select.

Debug Mode

To enable debug mode, the byte at 21-bit address $D1CBA needs to be constantly replaced or substituted with the value of $01. This can be achieved in Mednafen by following these keyboard instructions:

  • ALT + C
  • Command: 2 (Cheat Search...)
  • Command: 1 (Add Cheat)
  • Name: Debug Mode
  • Type: S
  • Address: $D1CBA
  • Value: $01
  • Enable: Y
  • Add cheat confirmation: Y

To use the debug mode on a real system, or an emulator without cheat functionality, patch track 2 and track 32 at offset $218AB (assuming 2048-bytes-per-sector rip), replacing $9C with $8D.

Debug Area

Ys IV TGCD Debug Area.png

Choose "Beginning" at the title screen to start in a special debug area, with various NPCs you can talk to to activate various debugging features.

Debug Menu

Ys IV TGCD Debug Menu.png

To activate the debug menu in-game, hold I while pressing II.

  • STAT: Set debugging flags.
  • EXP: Add 100 exp.
  • GOLD: Directly set gold quantity.
  • HP/MP: Manipulate current HP and MP.
  • GOODS: Select and add items to the inventory.
  • MUSIC: Play CD-DA music and ADPCM voice acting.
  • FLAG: Set game state flag(?).
  • F-MAP: View game state flags(?).