ROM map
| Address | Length | Type | Description | Arguments/Return value |
|---|---|---|---|---|
| $80:8002 | 0xAC | Code | Initialize various SNES hardware registers | None |
| $80:80AE | 0xBE | Code | Main entry point of the game. Clears RAM and does various other initialization | None |
| $80:816C | 0x0D | Code | VBLANK interrupt handler | None |
| $80:8179 | 0x80 | Code | Default (and only) VBLANK handler | None |
| $80:81F9 | 0x10 | Data | The direction for each d-pad input | direction x2[0x10] |
| $80:8209 | 0x01 | Code | Various interrupt handlers. Does nothing. | None |
| $80:820A | 0x3C | Code | Deletes all entities (except the current entity) and VBLANK and VBLANK end listeners | None |
| $80:8246 | 0x02 | Code | Unused infinite loop | None |
| $80:8248 | 0x16 | Code | Creates an entity for a player | Y+A = [pointer32] Entity pointer Returns A = [unit16] Entity ID |
| $80:825E | 0x80 | Code | Creates an entity | Y+A = [pointer32] Entity pointer Returns A = [uint16] Entity ID |
| $80:82DE | 0x30 | Data | Direct page address for each entity | pointer16[0x18] |
| $80:830E | 0x30 | Data | Starting stack address for each entity | pointer16[0x18] |
| $80:833E | 0x15 | Code | Entities return here when completed. Deletes the current entity and resumes the entity loop. | None |
| $80:8353 | 0x45 | Code | Pauses the current entity for the given number of frames | A = [uint16] Number of frames |
| $80:8398 | 0x16 | Code | Decrements the number of frames left to wait on each entity | None |
| $80:83AE | 0x27 | Code | Creates a VBLANK listener | Y+A = [pointer32] Listener subroutine Returns X = [uint16] Listener ID |
| $80:83D5 | 0x0B | Code | Deletes the given VBLANK listener | A = [uint16] Listener ID |
| $80:83E0 | 0x38 | Code | Runs all the current VBLANK listeners | None |
| $80:8418 | 0x25 | Code | Creates a VBLANK end listener | Y+A = [pointer32] Listener subroutine Returns X = [uint16] Listener ID |
| $80:843D | 0x38 | Code | Runs all the current VBLANK end listeners | None |
| $80:8475 | 0x0B | Code | Sets the sprite collision handler for the current entity | Y+A = [pointer32] Handler subroutine |
| $80:8480 | 0x31 | Code | Runs the sprite collision handler for the given entity | X = [uint16] Entity ID Y = [sprite type] Type of sprite collided with |
| $80:84B1 | 0x65 | Code | Main game loop | None |
| $80:8516 | 0xB9 | Code | Plays the current level | None |
| $80:891A | 0x19 | Code | Fades the screen in from black | None |
| $80:8933 | 0x14 | Code | Fades the screen out to black | None |
| $80:9C52 | 0x20 | Code | Fades the screen in from black asynchronously | None |
| $80:9C72 | 0x1A | Code | Fades the screen out to black asynchronously | None |
| $80:9D39 | 0x22 | Code | Gets a random value in the range 0-255 | Returns A = [uint16] Random value |
| $80:9D6A | 0x3C | Code | Gets the player that is using the given character | A = [character x2] Character Returns X = [uint16 x2] Player |
| $80:BE0C | 0x2F | Code | Creates a sprite | Returns A/Y = [pointer16] Sprite pointer |
| $81:8191 | 0x11 | Code | Marks the given one-shot entity as no longer needing to be spawned | A = [uint16] One-shot entity index |
| $80:BE41 | 0x3C | Code | Deletes the given sprite | A = [pointer16] Sprite pointer |
| $81:8000 | 0x24 | Code | Creates a sprite for a monster | |
| $80:CC3B | 0x11 | Code | Plays the given sound effect | A = [uint16] Sound effect ID |
| $80:AE97 | 0x95 | Code | Gets whether the background is solid to monsters at the given position | X = [int16] X position Y = [int16] Y position Returns C = [boolean] Whether it's solid |
| $80:BF67 | 0x61 | Code | Gets whether the given position is touching a sprite that is solid to monsters | A = [pointer16] current sprite X = [int16] X position Y = [int16] Y position Returns C = [boolean] Whether it's solid |
| $80:B2A5 | 0x5D | Code | Finds the closest player within the given distance on a single axis | A = [uint16] Maximum single-axis distance X = [int16] X position Y = [int16] Y position Returns A = [uint16] direction to player Returns X = [uint16] single-axis distance to player Returns Y = [pointer16] player sprite |
| $80:C7D9 | 0x40 | Code | Awards points to the given character | N = [boolean] give to Julie A = [uint16 bcd] number of points |
| $81:83A3 | 0x23 | Code | Show monster death animation and play sound | A = [pointer16] Animation X = [uint16] Do nothing if not equal to 0xF5F5 Y = [uint16] Sprite tile data bank |
| $81:83C6 | 0x3E | Code | Call from a monster's sprite collision handler to cause it to be bubbled | Returns C = [boolean] Collision handler return value |
| $81:847E | 0x58 | Code | Call from a monster's sprite collision handler to cause it to be frozen | Returns C = [boolean] Collision handler return value |
| $81:8561 | 0x2A | Data | The base damage dealt by each weapon | uint16[21] |
| $81:8506 | 0x3C | Code | Call from a monster's sprite collision handler to show a damage animation | Returns C = [boolean] Collision handler return value |
| $80:B123 | 0x6C | Code | Finds the closest sprite for a monster to target | X = [int16] X position Y = [int16] Y position Returns A = [uint16] distance to target Returns X = [pointer16] target sprite |
| $80:B3F1 | 0x31 | Code | Sets the given sprite's X and/or Y positions to that of the target if they are within 1 pixel | X = [pointer16] Sprite Y = [pointer16] Target sprite |
| $80:B22A | 0x35 | Code | Gets the direction from the given sprite to the given target sprite | X = [pointer16] Sprite Y = [pointer16] Target sprite Returns A = [direction] Direction to target |
| $81:832C | 0x1D | Code | Shows the given animation on the sprite stored in $08 | A = [pointer16] Animation |