Routines
Prev: C898 Up: Map Next: C8CA
C8B2: Fill Attribute Rectangle
Used by the routine at UpdateLogoPiece.
Sets a rectangle of attributes in the attribute buffer.
Input
A Attribute
B Width
C Height
HL Address in the attribute buffer
Work out the distance from one row to the next.
FillAttributeRectangle C8B2 LD E,A Add the flash colour used in the last frame (PreviousFlashColour) to the attribute, and keep it.
C8B3 LD A,($BBFC)
C8B6 OR E
C8B7 EX AF,AF'
C8B8 LD A,$18 Work out how far to move on from the end of one row of the rectangle to the start of the next.
C8BA SUB B
C8BB LD E,A
C8BC LD D,$00
C8BE EX AF,AF'
Fill each row of the rectangle.
FillAttributeRectangle_Row C8BF PUSH BC Keep the width and the height.
FillAttributeRectangle_Loop C8C0 LD (HL),A Set the attributes of one row of the rectangle.
C8C1 INC HL
C8C2 DJNZ FillAttributeRectangle_Loop
C8C4 ADD HL,DE Move on to the start of the next row, and loop back until all of the rows have been set.
C8C5 POP BC
C8C6 DEC C
C8C7 JR NZ,FillAttributeRectangle_Row
C8C9 RET Return.
Prev: C898 Up: Map Next: C8CA