john-lay / za-engine

A GB Studio project to test features for Zelda's Adventure

za-engine

A GB Studio project to test features for Zelda's Adventure

Supporting a fork of gb-studio/v2beta https://github.com/john-lay/gb-studio/tree/feature/zeldasAdventureHud

Features

• Display a HUD consisting of a rupee counter and hearts remaining
• Enhance the game with Audio + sound effects
• Zelda maintains horizonal position when navigating east and west (and vertical position for north/south)
• Unique spell animations should work on any screen
• Animate water and lamp tiles
• Implement a save feature
• Implement atk/def logic for Zelda and enemies
• Show all weapons/treasures over 2 inventory screens
• Show collected celestial signs on inventory screen
• Show Zelda's position in an overworld minimap

Debug Controls

As the fork of GB Studio involves modifying in game variables, a feature to modify them has been created. GB Studio Global variables ($00) start some where around 0xCC40. Because the location is defined at compile time, pointers have to be updated if there's significant change to the engine. To allow visual identification in a debugger such as BGB the following script edits these variables:

• select prints the current value of the variables
• start selects the next variable (see below)
• B decrements the selected variable
• A increments the selected variable

The variables list is as follows (and circles back to the start):

1. Old health
2. Health
3. Old Max hearts
4. Max hearts
5. Old rupees
6. Rupees