Routines
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AD17: Flash Attribute Alternative
Return attribute INK:RED, PAPER:BLACK (BRIGHT) or INK:RED, PAPER:WHITE (BRIGHT) according to bit 04 of GameTimer.
Output
A Attribute value
FlashAttributeAlternative AD17 LD A,($5E42) Fetch GameTimer.
AD1A AND %00010000 Keep only bit 4.
AD1C JR Z,FlashAttribute_Loop Jump to FlashAttribute_Loop if that bit is reset.
AD1E LD A,$38 A=38.
AD20 JR FlashAttribute_Loop Jump to FlashAttribute_Loop.
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