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28 lines
482 B
28 lines
482 B
SECTION "functions", ROM0[$2000] |
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; Wait for vblank without using interrupts. |
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waitVBlank: |
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push af |
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.waitVBlankLoop: |
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ldh a, [$ff44] |
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cp $90 |
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jr nz, .waitVBlankLoop |
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pop af |
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ret |
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; Writes a value across 16 bytes, starting at HL. Intended to fill a single tile. |
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; Parameters: |
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; B - The value to set the bytes to. |
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; Modifies: |
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; HL - End result: HL + 16 |
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fillTile: |
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push af |
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push de |
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ld d, 16 |
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ld a, b |
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.fillTileLoop: |
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ld [hli], a |
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dec d |
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jr nz, .fillTileLoop |
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pop de |
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pop af |
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ret
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