Routines
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CB71: Move a screen address down a character row
Used by the routines at PICK_UP_THING, DRAW_PANEL_FRAME, PRINT_BLOCK_COLUMN, PRINT_BLOCK and PRINT_LIFE_ICON.
32 on, and into the next third of the screen (8 pages on) when that carries out of L.
Input
HL the screen address
NEXT_CHAR_ROW CB71 LD A,L
CB72 ADD A,$20
CB74 LD L,A
CB75 RET NC
CB76 LD A,H
CB77 ADD A,$08
CB79 LD H,A
CB7A RET
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