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24 lines
595 B
Plaintext
24 lines
595 B
Plaintext
; Vera Tile Manipulation Assembly Language Routines for C02
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; Requires External Routines
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; and External Variables TEMP1
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;gettda() - Get Tile Data Address
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;Args: A = Layer (0/1)
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;
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;Destroys: TEMP1,TEMP2
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;Returns: A = Tile Base Bank
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; Y,X = Tile Base Address
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GETTBA: JSR SET
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;gettdo() - Get Tile Data Offset
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;Args: A = Layer (0/1)
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; Y = Tile Offset
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;Destroys: TEMP1,TEMP2
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;Returns: A = Tile Base Bank
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; Y,X = Tile Base Address
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GETTBA: STA TEMP0 ;Save Layer Number
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STY TEMP1 ;Set LSB to Offset
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JSR GETTSZ ;Get Tile Size
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