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Routines |
| Prev: A17D | Up: Map | Next: A19C |
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Used by the routines at DrawInventoryItem and DisplayPlayerLives.
Clears the pixels in the area under a sprite, which is two bytes wide and 14 rows high, working up from the position of an entity.
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| ClearSprite | A185 | LD L,(IX+$03) | L=the entity X position, and H=the entity Y position. | |||||
| A188 | LD H,(IX+$04) | |||||||
| A18B | CALL ScreenAddress | Call ScreenAddress to get the screen address of the position. | ||||||
| A18E | LD B,$14 | B=14 (the number of rows). | ||||||
| ClearSprite_Row | A190 | LD (HL),$00 | Clear the first byte of the row. | |||||
| A192 | INC L | Move to the next byte. | ||||||
| A193 | LD (HL),$00 | Clear the second byte of the row. | ||||||
| A195 | DEC L | Move back to the first byte. | ||||||
| A196 | CALL ScreenPosition1PixelAbove | Call ScreenPosition1PixelAbove to move up one pixel row. | ||||||
| A199 | DJNZ ClearSprite_Row | Decrease the row counter by one and loop back to ClearSprite_Row until it is zero. | ||||||
| A19B | RET | Return. | ||||||
| Prev: A17D | Up: Map | Next: A19C |