Routines
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26508: Scroll Playarea Attributes Right
Scrolls the playarea attribute buffer right by one column to match the pixel scrolling. This keeps the colours aligned with the screen content when its scrolling horizontally.
ScrollAttributes_Right 26508 LD HL,23038 Set the source address in HL to 23038 (attribute buffer location).
26511 LD DE,23039 And the destination address in DE to 23039 (attribute buffer location).
26514 LD B,16 Set a counter in B to process 16 rows.
ScrollAttributes_Right_RowLoop 26516 LD C,255 C=255.
26518 LDD Copy 31 bytes per row. This shifts the entire row right by 1 position.
26520 LDD
26522 LDD
26524 LDD
26526 LDD
26528 LDD
26530 LDD
26532 LDD
26534 LDD
26536 LDD
26538 LDD
26540 LDD
26542 LDD
26544 LDD
26546 LDD
26548 LDD
26550 LDD
26552 LDD
26554 LDD
26556 LDD
26558 LDD
26560 LDD
26562 LDD
26564 LDD
26566 LDD
26568 LDD
26570 LDD
26572 LDD
26574 LDD
26576 LDD
26578 LDD
26580 DEC HL Skip the last column of the source row.
26581 DEC DE Skip the last column of the destination row.
26582 DJNZ ScrollAttributes_Right_RowLoop Decrease the row counter by one and loop back to ScrollAttributes_Right_RowLoop until all of the rows have been processed.
26584 LD HL,22528 HL=22528 (attribute buffer location).
26587 JP FillNewAttributeColumn Jump to FillNewAttributeColumn.
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